diff --git a/src/factories/NFTFactory.ts b/src/factories/NFTFactory.ts
index 79d036ac6..20100d128 100644
--- a/src/factories/NFTFactory.ts
+++ b/src/factories/NFTFactory.ts
@@ -9,7 +9,9 @@ import {
   generateDtName,
   getFreCreationParams,
   getErcCreationParams,
-  getPoolCreationParams
+  getPoolCreationParams,
+  configHelperNetworks,
+  setContractDefaults
 } from '../utils'
 import {
   FreCreationParams,
@@ -17,6 +19,7 @@ import {
   PoolCreationParams,
   DispenserCreationParams
 } from '../interfaces'
+import { Config } from '../models/index.js'
 import { ProviderFees } from '../@types/index.js'
 
 interface Template {
@@ -47,7 +50,7 @@ export class NftFactory {
   public factory721Address: string
   public factory721Abi: AbiItem | AbiItem[]
   public web3: Web3
-  public startBlock: number
+  public config: Config
   public factory721: Contract
 
   /**
@@ -60,15 +63,15 @@ export class NftFactory {
     factory721Address: string,
     web3: Web3,
     factory721Abi?: AbiItem | AbiItem[],
-    startBlock?: number
+    config?: Config
   ) {
     this.factory721Address = factory721Address
     this.factory721Abi = factory721Abi || (defaultFactory721Abi.abi as AbiItem[])
     this.web3 = web3
-    this.startBlock = startBlock || 0
-    this.factory721 = new this.web3.eth.Contract(
-      this.factory721Abi,
-      this.factory721Address
+    this.config = config || configHelperNetworks[0]
+    this.factory721 = setContractDefaults(
+      new this.web3.eth.Contract(this.factory721Abi, this.factory721Address),
+      this.config
     )
   }
 
@@ -135,7 +138,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     let tokenAddress = null
@@ -277,7 +280,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -333,7 +336,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -390,7 +393,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -444,7 +447,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -503,7 +506,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -563,7 +566,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -618,7 +621,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -674,7 +677,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -739,7 +742,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -807,7 +810,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -873,7 +876,7 @@ export class NftFactory {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
diff --git a/src/models/Config.ts b/src/models/Config.ts
index faf4d559f..7b6c12bbb 100644
--- a/src/models/Config.ts
+++ b/src/models/Config.ts
@@ -170,6 +170,30 @@ export class Config {
    * @type {string}
    */
   oceanTokenSymbol: string
+
+  /**
+   * Specify the transaction Block Timeout
+   * @type {number}
+   */
+  transactionBlockTimeout: number
+
+  /**
+   * Specify the transaction Confirmation Blocks
+   * @type {number}
+   */
+  transactionConfirmationBlocks: number
+
+  /**
+   * Specify the transaction Polling Blocks Timeout
+   * @type {number}
+   */
+  transactionPollingTimeout: number
+
+  /**
+   * Specify the multiplier for the gas fee
+   * @type {number}
+   */
+  gasFeeMultiplier: number
 }
 
 export default Config
diff --git a/src/pools/Router.ts b/src/pools/Router.ts
index 37f4108d7..a365d6e43 100644
--- a/src/pools/Router.ts
+++ b/src/pools/Router.ts
@@ -3,8 +3,9 @@ import Web3 from 'web3'
 import { TransactionReceipt } from 'web3-core'
 import { AbiItem } from 'web3-utils'
 import defaultRouter from '../artifacts/pools/FactoryRouter.sol/FactoryRouter.json'
-import { getFairGasPrice } from '../utils'
+import { getFairGasPrice, setContractDefaults, configHelperNetworks } from '../utils'
 import { Operation } from '../interfaces/RouterInterface'
+import { Config } from '../models/index.js'
 
 /**
  * Provides an interface for FactoryRouter contract
@@ -14,7 +15,7 @@ export class Router {
   public routerAddress: string
   public RouterAbi: AbiItem | AbiItem[]
   public web3: Web3
-  public startBlock: number
+  public config: Config
   public router: Contract
 
   /**
@@ -27,13 +28,16 @@ export class Router {
     routerAddress: string,
     web3: Web3,
     RouterAbi?: AbiItem | AbiItem[],
-    startBlock?: number
+    config?: Config
   ) {
     this.routerAddress = routerAddress
     this.RouterAbi = RouterAbi || (defaultRouter.abi as AbiItem[])
     this.web3 = web3
-    this.startBlock = startBlock || 0
-    this.router = new this.web3.eth.Contract(this.RouterAbi, this.routerAddress)
+    this.config = config || configHelperNetworks[0]
+    this.router = setContractDefaults(
+      new this.web3.eth.Contract(this.RouterAbi, this.routerAddress),
+      this.config
+    )
   }
 
   /**
@@ -71,7 +75,7 @@ export class Router {
     const trxReceipt = await this.router.methods.buyDTBatch(operations).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -165,7 +169,7 @@ export class Router {
     const trxReceipt = await this.router.methods.addOceanToken(tokenAddress).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -217,7 +221,7 @@ export class Router {
     const trxReceipt = await this.router.methods.removeOceanToken(tokenAddress).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -262,7 +266,7 @@ export class Router {
     const trxReceipt = await this.router.methods.addSSContract(tokenAddress).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -310,7 +314,7 @@ export class Router {
     const trxReceipt = await this.router.methods.removeSSContract(tokenAddress).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -359,7 +363,7 @@ export class Router {
     const trxReceipt = await this.router.methods.addFixedRateContract(tokenAddress).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -410,7 +414,7 @@ export class Router {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -459,7 +463,7 @@ export class Router {
     const trxReceipt = await this.router.methods.addDispenserContract(tokenAddress).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -510,7 +514,7 @@ export class Router {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -571,7 +575,7 @@ export class Router {
     const trxReceipt = await this.router.methods.updateOPFFee(newFee, newFee).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -620,7 +624,7 @@ export class Router {
     const trxReceipt = await this.router.methods.addPoolTemplate(templateAddress).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -670,7 +674,7 @@ export class Router {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
diff --git a/src/pools/balancer/Pool.ts b/src/pools/balancer/Pool.ts
index 0e1499d73..c5950060d 100644
--- a/src/pools/balancer/Pool.ts
+++ b/src/pools/balancer/Pool.ts
@@ -2,7 +2,13 @@ import Web3 from 'web3'
 import { AbiItem } from 'web3-utils/types'
 import { TransactionReceipt } from 'web3-core'
 import { Contract } from 'web3-eth-contract'
-import { Logger, getFairGasPrice, LoggerInstance } from '../../utils'
+import {
+  Logger,
+  getFairGasPrice,
+  LoggerInstance,
+  configHelperNetworks,
+  setContractDefaults
+} from '../../utils'
 import BigNumber from 'bignumber.js'
 import PoolTemplate from '../../artifacts/pools/balancer/BPool.sol/BPool.json'
 import defaultErc20Abi from '../../artifacts/templates/ERC20Template.sol/ERC20Template.json'
@@ -13,24 +19,31 @@ import {
   AmountsInMaxFee,
   AmountsOutMaxFee
 } from '../../interfaces'
+import { Config } from '../../models'
 const MaxUint256 =
   '115792089237316195423570985008687907853269984665640564039457584007913129639934'
 
 /**
  * Provides an interface to Ocean friendly fork from Balancer BPool
  */
-// TODO: Add decimals handling
 export class Pool {
   public poolAbi: AbiItem | AbiItem[]
   public web3: Web3
   public GASLIMIT_DEFAULT = 1000000
   private logger: Logger
-
-  constructor(web3: Web3, logger: Logger, poolAbi: AbiItem | AbiItem[] = null) {
+  private config: Config
+
+  constructor(
+    web3: Web3,
+    logger: Logger,
+    poolAbi: AbiItem | AbiItem[] = null,
+    config?: Config
+  ) {
     if (poolAbi) this.poolAbi = poolAbi
     else this.poolAbi = PoolTemplate.abi as AbiItem[]
     this.web3 = web3
     this.logger = logger
+    this.config = config || configHelperNetworks[0]
   }
 
   /**
@@ -52,7 +65,10 @@ export class Pool {
   ): Promise<number> {
     const tokenContract =
       contractInstance ||
-      new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], tokenAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], tokenAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -79,7 +95,10 @@ export class Pool {
     spender: string
   ): Promise<string> {
     const tokenAbi = defaultErc20Abi.abi as AbiItem[]
-    const datatoken = new this.web3.eth.Contract(tokenAbi, tokenAddress)
+    const datatoken = setContractDefaults(
+      new this.web3.eth.Contract(tokenAbi, tokenAddress),
+      this.config
+    )
     const trxReceipt = await datatoken.methods.allowance(owner, spender).call()
 
     return await this.unitsToAmount(tokenAddress, trxReceipt)
@@ -125,7 +144,10 @@ export class Pool {
         type: 'function'
       }
     ] as AbiItem[]
-    const token = new this.web3.eth.Contract(minABI, tokenAddress)
+    const token = setContractDefaults(
+      new this.web3.eth.Contract(minABI, tokenAddress),
+      this.config
+    )
     if (!force) {
       const currentAllowence = await this.allowance(tokenAddress, account, spender)
       if (new Decimal(currentAllowence).greaterThanOrEqualTo(new Decimal(amount))) {
@@ -140,7 +162,7 @@ export class Pool {
       result = await token.methods.approve(spender, amountFormatted).send({
         from: account,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     } catch (e) {
       this.logger.error(`ERRPR: Failed to approve spender to spend tokens : ${e.message}`)
@@ -157,7 +179,10 @@ export class Pool {
   async sharesBalance(account: string, poolAddress: string): Promise<string> {
     let result = null
     try {
-      const token = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+      const token = setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi, poolAddress),
+        this.config
+      )
       const balance = await token.methods.balanceOf(account).call()
       result = this.web3.utils.fromWei(balance)
     } catch (e) {
@@ -184,7 +209,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -209,9 +237,12 @@ export class Pool {
     poolAddress: string,
     fee: string
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress, {
-      from: account
-    })
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress, {
+        from: account
+      }),
+      this.config
+    )
     let result = null
     const estGas = await this.estSetSwapFee(account, poolAddress, fee)
 
@@ -219,7 +250,7 @@ export class Pool {
       result = await pool.methods.setSwapFee(this.web3.utils.toWei(fee)).send({
         from: account,
         gas: estGas,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     } catch (e) {
       this.logger.error(`ERROR: Failed to set pool swap fee: ${e.message}`)
@@ -233,7 +264,10 @@ export class Pool {
    * @return {String}
    */
   async getNumTokens(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.getNumTokens().call()
@@ -249,7 +283,10 @@ export class Pool {
    * @return {String}
    */
   async getPoolSharesTotalSupply(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let amount = null
     try {
       const result = await pool.methods.totalSupply().call()
@@ -266,7 +303,10 @@ export class Pool {
    * @return {String[]}
    */
   async getCurrentTokens(poolAddress: string): Promise<string[]> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.getCurrentTokens().call()
@@ -282,7 +322,10 @@ export class Pool {
    * @return {String[]}
    */
   async getFinalTokens(poolAddress: string): Promise<string[]> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.getFinalTokens().call()
@@ -298,7 +341,10 @@ export class Pool {
    * @return {String}
    */
   async getController(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.getController().call()
@@ -314,7 +360,10 @@ export class Pool {
    * @return {String}
    */
   async getBaseToken(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.getBaseTokenAddress().call()
@@ -330,7 +379,10 @@ export class Pool {
    * @return {String}
    */
   async getDatatoken(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.getDatatokenAddress().call()
@@ -346,7 +398,10 @@ export class Pool {
    * @return {String}
    */
   async getMarketFeeCollector(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods._publishMarketCollector().call()
@@ -362,7 +417,10 @@ export class Pool {
    * @return {String}
    */
   async getOPFCollector(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods._opfCollector().call()
@@ -379,7 +437,10 @@ export class Pool {
    * @return {Boolean}
    */
   async isBound(poolAddress: string, token: string): Promise<boolean> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.isBound(token).call()
@@ -399,7 +460,10 @@ export class Pool {
   async getReserve(poolAddress: string, token: string): Promise<string> {
     let amount = null
     try {
-      const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+      const pool = setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi, poolAddress),
+        this.config
+      )
       const result = await pool.methods.getBalance(token).call()
       amount = await this.unitsToAmount(token, result)
     } catch (e) {
@@ -415,7 +479,10 @@ export class Pool {
    * @return {Boolean}
    */
   async isFinalized(poolAddress: string): Promise<boolean> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     try {
       result = await pool.methods.isFinalized().call()
@@ -431,7 +498,10 @@ export class Pool {
    * @return {String} Swap fee. To get the percentage value, substract by 100. E.g. `0.1` represents a 10% swap fee.
    */
   async getSwapFee(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let fee = null
     try {
       const result = await pool.methods.getSwapFee().call()
@@ -449,7 +519,10 @@ export class Pool {
    * @return {String}
    */
   async getNormalizedWeight(poolAddress: string, token: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let weight = null
     try {
       const result = await pool.methods.getNormalizedWeight(token).call()
@@ -467,7 +540,10 @@ export class Pool {
    * @return {String}
    */
   async getDenormalizedWeight(poolAddress: string, token: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let weight = null
     try {
       const result = await pool.methods.getDenormalizedWeight(token).call()
@@ -484,7 +560,10 @@ export class Pool {
    * @return {String}
    */
   async getTotalDenormalizedWeight(poolAddress: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let weight = null
     try {
       const result = await pool.methods.getTotalDenormalizedWeight().call()
@@ -502,7 +581,10 @@ export class Pool {
    * @return {String}
    */
   async getMarketFees(poolAddress: string, token: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let weight = null
     try {
       const result = await pool.methods.publishMarketFees(token).call()
@@ -518,7 +600,10 @@ export class Pool {
    * @return {CurrentFees}
    */
   async getCurrentMarketFees(poolAddress: string): Promise<CurrentFees> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     try {
       const currentMarketFees = await pool.methods.getCurrentOPFFees().call()
       return currentMarketFees
@@ -532,7 +617,10 @@ export class Pool {
    * @return {CurrentFees}
    */
   async getCurrentOPFFees(poolAddress: string): Promise<CurrentFees> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     try {
       const currentMarketFees = await pool.methods.getCurrentOPFFees().call()
       return currentMarketFees
@@ -548,7 +636,10 @@ export class Pool {
    * @return {String}
    */
   async getCommunityFees(poolAddress: string, token: string): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let weight = null
     try {
       const result = await pool.methods.communityFees(token).call()
@@ -573,7 +664,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -594,7 +688,10 @@ export class Pool {
    * @return {TransactionReceipt}
    */
   async collectOPF(address: string, poolAddress: string): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     const estGas = await this.estCollectOPF(address, poolAddress)
 
@@ -602,7 +699,7 @@ export class Pool {
       result = await pool.methods.collectOPF().send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     } catch (e) {
       this.logger.error(`ERROR: Failed to swap exact amount in : ${e.message}`)
@@ -625,7 +722,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -653,7 +753,10 @@ export class Pool {
     if ((await this.getMarketFeeCollector(poolAddress)) !== address) {
       throw new Error(`Caller is not MarketFeeCollector`)
     }
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     const estGas = await this.estCollectMarketFee(address, poolAddress)
 
@@ -661,7 +764,7 @@ export class Pool {
       result = await pool.methods.collectMarketFee().send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     } catch (e) {
       this.logger.error(`ERROR: Failed to swap exact amount in : ${e.message}`)
@@ -685,7 +788,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -714,7 +820,10 @@ export class Pool {
     if ((await this.getMarketFeeCollector(poolAddress)) !== address) {
       throw new Error(`Caller is not MarketFeeCollector`)
     }
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
     const estGas = await this.estUpdateMarketFeeCollector(
       address,
@@ -726,7 +835,7 @@ export class Pool {
       result = await pool.methods.updateMarketFeeCollector(newCollector).send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     } catch (e) {
       this.logger.error(`ERROR: Failed to swap exact amount in : ${e.message}`)
@@ -736,9 +845,9 @@ export class Pool {
 
   async amountToUnits(token: string, amount: string): Promise<string> {
     try {
-      const tokenContract = new this.web3.eth.Contract(
-        defaultErc20Abi.abi as AbiItem[],
-        token
+      const tokenContract = setContractDefaults(
+        new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], token),
+        this.config
       )
       let decimals = await tokenContract.methods.decimals().call()
       if (decimals === '0') {
@@ -754,9 +863,9 @@ export class Pool {
 
   async unitsToAmount(token: string, amount: string): Promise<string> {
     try {
-      const tokenContract = new this.web3.eth.Contract(
-        defaultErc20Abi.abi as AbiItem[],
-        token
+      const tokenContract = setContractDefaults(
+        new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], token),
+        this.config
       )
       let decimals = await tokenContract.methods.decimals().call()
       if (decimals === '0') {
@@ -788,7 +897,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const maxPrice = amountsInOutMaxFee.maxPrice
       ? this.web3.utils.toWei(amountsInOutMaxFee.maxPrice)
@@ -836,7 +948,10 @@ export class Pool {
     tokenInOutMarket: TokenInOutMarket,
     amountsInOutMaxFee: AmountsInMaxFee
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
 
     amountsInOutMaxFee.tokenAmountIn = await this.amountToUnits(
       tokenInOutMarket.tokenIn,
@@ -879,7 +994,7 @@ export class Pool {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       this.logger.error(`ERROR: Failed to swap exact amount in : ${e.message}`)
@@ -906,7 +1021,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
 
@@ -951,7 +1069,10 @@ export class Pool {
     tokenInOutMarket: TokenInOutMarket,
     amountsInOutMaxFee: AmountsOutMaxFee
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
 
     amountsInOutMaxFee.maxAmountIn = await this.amountToUnits(
@@ -993,7 +1114,7 @@ export class Pool {
         .send({
           from: account,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       this.logger.error(`ERROR: Failed to swap exact amount out: ${e.message}`)
@@ -1019,7 +1140,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1047,7 +1171,10 @@ export class Pool {
     poolAmountOut: string,
     maxAmountsIn: string[]
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     const weiMaxAmountsIn = []
     const tokens = await this.getFinalTokens(poolAddress)
 
@@ -1071,7 +1198,7 @@ export class Pool {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       this.logger.error(`ERROR: Failed to join pool: ${e.message}`)
@@ -1097,7 +1224,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1125,7 +1255,10 @@ export class Pool {
     poolAmountIn: string,
     minAmountsOut: string[]
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     const weiMinAmountsOut = []
     const tokens = await this.getFinalTokens(poolAddress)
 
@@ -1144,7 +1277,11 @@ export class Pool {
     try {
       result = await pool.methods
         .exitPool(this.web3.utils.toWei(poolAmountIn), weiMinAmountsOut)
-        .send({ from: account, gas: estGas, gasPrice: await getFairGasPrice(this.web3) })
+        .send({
+          from: account,
+          gas: estGas,
+          gasPrice: await getFairGasPrice(this.web3, this.config)
+        })
     } catch (e) {
       this.logger.error(`ERROR: Failed to exit pool: ${e.message}`)
     }
@@ -1171,7 +1308,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1201,7 +1341,10 @@ export class Pool {
     tokenAmountIn: string,
     minPoolAmountOut: string
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
 
     const amountInFormatted = await this.amountToUnits(tokenIn, tokenAmountIn)
@@ -1223,7 +1366,7 @@ export class Pool {
         .send({
           from: account,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       this.logger.error(`ERROR: Failed to pay tokens in order to \
@@ -1252,7 +1395,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1282,7 +1428,10 @@ export class Pool {
     poolAmountOut: string,
     maxAmountIn: string
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
 
     const maxAmountInFormatted = await this.amountToUnits(tokenIn, maxAmountIn)
@@ -1304,7 +1453,7 @@ export class Pool {
         .send({
           from: account,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       this.logger.error('ERROR: Failed to join swap pool amount out')
@@ -1332,7 +1481,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1362,7 +1514,10 @@ export class Pool {
     poolAmountIn: string,
     minTokenAmountOut: string
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
 
     const minTokenOutFormatted = await this.amountToUnits(tokenOut, minTokenAmountOut)
@@ -1384,7 +1539,7 @@ export class Pool {
         .send({
           from: account,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       this.logger.error(`ERROR: Failed to pay pool shares into the pool: ${e.message}`)
@@ -1412,7 +1567,10 @@ export class Pool {
   ): Promise<number> {
     const poolContract =
       contractInstance ||
-      new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress)
+      setContractDefaults(
+        new this.web3.eth.Contract(this.poolAbi as AbiItem[], poolAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1442,7 +1600,10 @@ export class Pool {
     tokenAmountOut: string,
     maxPoolAmountIn: string
   ): Promise<TransactionReceipt> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let result = null
 
     const estGas = await this.estExitswapExternAmountOut(
@@ -1463,7 +1624,7 @@ export class Pool {
         .send({
           from: account,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       this.logger.error('ERROR: Failed to exitswapExternAmountOut')
@@ -1485,17 +1646,20 @@ export class Pool {
     tokenOut: string,
     swapMarketFee: string
   ): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let decimalsTokenIn = 18
     let decimalsTokenOut = 18
 
-    const tokenInContract = new this.web3.eth.Contract(
-      defaultErc20Abi.abi as AbiItem[],
-      tokenIn
+    const tokenInContract = setContractDefaults(
+      new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], tokenIn),
+      this.config
     )
-    const tokenOutContract = new this.web3.eth.Contract(
-      defaultErc20Abi.abi as AbiItem[],
-      tokenOut
+    const tokenOutContract = setContractDefaults(
+      new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], tokenOut),
+      this.config
     )
     try {
       decimalsTokenIn = await tokenInContract.methods.decimals().call()
@@ -1539,7 +1703,10 @@ export class Pool {
     tokenAmountOut: string,
     swapMarketFee: string
   ): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
 
     const amountOutFormatted = await this.amountToUnits(tokenOut, tokenAmountOut)
 
@@ -1568,7 +1735,10 @@ export class Pool {
     tokenAmountIn: string,
     swapMarketFee: string
   ): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
 
     const amountInFormatted = await this.amountToUnits(tokenIn, tokenAmountIn)
 
@@ -1596,7 +1766,10 @@ export class Pool {
     tokenIn: string,
     tokenAmountIn: string
   ): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let amount = null
 
     try {
@@ -1616,7 +1789,10 @@ export class Pool {
     tokenIn: string,
     poolAmountOut: string
   ): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let amount = null
     const amountFormatted = await this.amountToUnits(poolAddress, poolAmountOut)
     try {
@@ -1637,7 +1813,10 @@ export class Pool {
     tokenOut: string,
     poolAmountIn: string
   ): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let amount = null
 
     try {
@@ -1659,7 +1838,10 @@ export class Pool {
     tokenOut: string,
     tokenAmountOut: string
   ): Promise<string> {
-    const pool = new this.web3.eth.Contract(this.poolAbi, poolAddress)
+    const pool = setContractDefaults(
+      new this.web3.eth.Contract(this.poolAbi, poolAddress),
+      this.config
+    )
     let amount = null
 
     try {
diff --git a/src/pools/dispenser/Dispenser.ts b/src/pools/dispenser/Dispenser.ts
index 339cde40b..393596176 100644
--- a/src/pools/dispenser/Dispenser.ts
+++ b/src/pools/dispenser/Dispenser.ts
@@ -4,8 +4,14 @@ import { Contract } from 'web3-eth-contract'
 import { TransactionReceipt } from 'web3-eth'
 import Decimal from 'decimal.js'
 import defaultDispenserAbi from '../../artifacts/pools/dispenser/Dispenser.sol/Dispenser.json'
-import { LoggerInstance as logger, getFairGasPrice } from '../../utils/'
+import {
+  LoggerInstance as logger,
+  getFairGasPrice,
+  configHelperNetworks,
+  setContractDefaults
+} from '../../utils/'
 import { Datatoken } from '../../tokens'
+import { Config } from '../../models/index.js'
 
 export interface DispenserToken {
   active: boolean
@@ -21,7 +27,7 @@ export class Dispenser {
   public GASLIMIT_DEFAULT = 1000000
   public web3: Web3 = null
   public dispenserAddress: string
-  public startBlock: number
+  public config: Config
   public dispenserAbi: AbiItem | AbiItem[]
   public dispenserContract: Contract
 
@@ -35,17 +41,16 @@ export class Dispenser {
     web3: Web3,
     dispenserAddress: string = null,
     dispenserAbi: AbiItem | AbiItem[] = null,
-    startBlock?: number
+    config?: Config
   ) {
     this.web3 = web3
     this.dispenserAddress = dispenserAddress
-    if (startBlock) this.startBlock = startBlock
-    else this.startBlock = 0
     this.dispenserAbi = dispenserAbi || (defaultDispenserAbi.abi as AbiItem[])
+    this.config = config || configHelperNetworks[0]
     if (web3)
-      this.dispenserContract = new this.web3.eth.Contract(
-        this.dispenserAbi,
-        this.dispenserAddress
+      this.dispenserContract = setContractDefaults(
+        new this.web3.eth.Contract(this.dispenserAbi, this.dispenserAddress),
+        this.config
       )
   }
 
@@ -140,7 +145,7 @@ export class Dispenser {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -200,7 +205,7 @@ export class Dispenser {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -243,7 +248,7 @@ export class Dispenser {
       const trxReceipt = await this.dispenserContract.methods.deactivate(dtAddress).send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
       return trxReceipt
     } catch (e) {
@@ -299,7 +304,7 @@ export class Dispenser {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -356,7 +361,7 @@ export class Dispenser {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -402,7 +407,7 @@ export class Dispenser {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
diff --git a/src/pools/fixedRate/FixedRateExchange.ts b/src/pools/fixedRate/FixedRateExchange.ts
index e63fd9612..871e584ac 100644
--- a/src/pools/fixedRate/FixedRateExchange.ts
+++ b/src/pools/fixedRate/FixedRateExchange.ts
@@ -5,7 +5,13 @@ import { TransactionReceipt } from 'web3-core'
 import { Contract } from 'web3-eth-contract'
 import { AbiItem } from 'web3-utils/types'
 import Web3 from 'web3'
-import { LoggerInstance, getFairGasPrice } from '../../utils'
+import {
+  LoggerInstance,
+  getFairGasPrice,
+  configHelperNetworks,
+  setContractDefaults
+} from '../../utils'
+import { Config } from '../../models/index.js'
 
 export interface FixedPriceExchange {
   active: boolean
@@ -54,7 +60,7 @@ export class FixedRateExchange {
   public web3: Web3
   public contract: Contract = null
 
-  public startBlock: number
+  public config: Config
   public ssAbi: AbiItem | AbiItem[]
 
   /**
@@ -67,27 +73,25 @@ export class FixedRateExchange {
     fixedRateAddress: string,
     fixedRateExchangeAbi: AbiItem | AbiItem[] = null,
     oceanAddress: string = null,
-    startBlock?: number
+    config?: Config
   ) {
     this.web3 = web3
-
-    if (startBlock) this.startBlock = startBlock
-    else this.startBlock = 0
+    this.config = config || configHelperNetworks[0]
     this.fixedRateExchangeAbi =
       fixedRateExchangeAbi || (defaultFixedRateExchangeAbi.abi as AbiItem[])
     this.oceanAddress = oceanAddress
     this.fixedRateAddress = fixedRateAddress
-    this.contract = new this.web3.eth.Contract(
-      this.fixedRateExchangeAbi,
-      this.fixedRateAddress
+    this.contract = setContractDefaults(
+      new this.web3.eth.Contract(this.fixedRateExchangeAbi, this.fixedRateAddress),
+      this.config
     )
   }
 
   async amountToUnits(token: string, amount: string): Promise<string> {
     let decimals = 18
-    const tokenContract = new this.web3.eth.Contract(
-      defaultErc20Abi.abi as AbiItem[],
-      token
+    const tokenContract = setContractDefaults(
+      new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], token),
+      this.config
     )
 
     try {
@@ -103,9 +107,9 @@ export class FixedRateExchange {
 
   async unitsToAmount(token: string, amount: string): Promise<string> {
     let decimals = 18
-    const tokenContract = new this.web3.eth.Contract(
-      defaultErc20Abi.abi as AbiItem[],
-      token
+    const tokenContract = setContractDefaults(
+      new this.web3.eth.Contract(defaultErc20Abi.abi as AbiItem[], token),
+      this.config
     )
     try {
       decimals = await tokenContract.methods.decimals().call()
@@ -202,7 +206,7 @@ export class FixedRateExchange {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -277,7 +281,7 @@ export class FixedRateExchange {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -346,7 +350,7 @@ export class FixedRateExchange {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -396,7 +400,7 @@ export class FixedRateExchange {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -445,7 +449,7 @@ export class FixedRateExchange {
     const trxReceipt = await this.contract.methods.toggleExchangeState(exchangeId).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
     return trxReceipt
   }
@@ -494,7 +498,7 @@ export class FixedRateExchange {
     const trxReceipt = await this.contract.methods.toggleExchangeState(exchangeId).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -721,7 +725,7 @@ export class FixedRateExchange {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -772,7 +776,7 @@ export class FixedRateExchange {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -820,7 +824,7 @@ export class FixedRateExchange {
     const trxReceipt = await this.contract.methods.collectBT(exchangeId).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
     return trxReceipt
   }
@@ -867,7 +871,7 @@ export class FixedRateExchange {
     const trxReceipt = await this.contract.methods.collectDT(exchangeId).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
     return trxReceipt
   }
@@ -914,7 +918,7 @@ export class FixedRateExchange {
     const trxReceipt = await this.contract.methods.collectMarketFee(exchangeId).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
     return trxReceipt
   }
@@ -961,7 +965,7 @@ export class FixedRateExchange {
     const trxReceipt = await this.contract.methods.collectOceanFee(exchangeId).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
     return trxReceipt
   }
@@ -1058,7 +1062,7 @@ export class FixedRateExchange {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -1112,7 +1116,7 @@ export class FixedRateExchange {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
diff --git a/src/pools/ssContracts/SideStaking.ts b/src/pools/ssContracts/SideStaking.ts
index 62b6705d4..df4415d02 100644
--- a/src/pools/ssContracts/SideStaking.ts
+++ b/src/pools/ssContracts/SideStaking.ts
@@ -2,20 +2,28 @@ import Web3 from 'web3'
 import { AbiItem } from 'web3-utils/types'
 import { TransactionReceipt } from 'web3-core'
 import { Contract } from 'web3-eth-contract'
-import { LoggerInstance, getFairGasPrice } from '../../utils'
+import {
+  LoggerInstance,
+  getFairGasPrice,
+  ConfigHelper,
+  configHelperNetworks
+} from '../../utils'
 import BigNumber from 'bignumber.js'
 import SideStakingTemplate from '../../artifacts/pools/ssContracts/SideStaking.sol/SideStaking.json'
 import defaultErc20Abi from '../../artifacts/templates/ERC20Template.sol/ERC20Template.json'
+import { Config } from '../../models'
 
 export class SideStaking {
   public ssAbi: AbiItem | AbiItem[]
   public web3: Web3
   public GASLIMIT_DEFAULT = 1000000
+  public config: Config
 
-  constructor(web3: Web3, ssAbi: AbiItem | AbiItem[] = null) {
+  constructor(web3: Web3, ssAbi: AbiItem | AbiItem[] = null, config?: Config) {
     if (ssAbi) this.ssAbi = ssAbi
     else this.ssAbi = SideStakingTemplate.abi as AbiItem[]
     this.web3 = web3
+    this.config = config || configHelperNetworks[0]
   }
 
   async amountToUnits(token: string, amount: string): Promise<string> {
@@ -322,7 +330,7 @@ export class SideStaking {
       result = await sideStaking.methods.getVesting(datatokenAddress).send({
         from: account,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     } catch (e) {
       LoggerInstance.error('ERROR: Failed to join swap pool amount out')
@@ -392,7 +400,7 @@ export class SideStaking {
         .send({
           from: account,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
     } catch (e) {
       LoggerInstance.error('ERROR: Failed to join swap pool amount out')
diff --git a/src/tokens/Datatoken.ts b/src/tokens/Datatoken.ts
index 15e68f550..7cb5543f6 100644
--- a/src/tokens/Datatoken.ts
+++ b/src/tokens/Datatoken.ts
@@ -5,9 +5,15 @@ import { Contract } from 'web3-eth-contract'
 import Decimal from 'decimal.js'
 import defaultDatatokensAbi from '../artifacts/templates/ERC20Template.sol/ERC20Template.json'
 import defaultDatatokensEnterpriseAbi from '../artifacts/templates/ERC20TemplateEnterprise.sol/ERC20TemplateEnterprise.json'
-import { LoggerInstance, getFairGasPrice } from '../utils'
+import {
+  LoggerInstance,
+  getFairGasPrice,
+  setContractDefaults,
+  configHelperNetworks
+} from '../utils'
 import { FreOrderParams, FreCreationParams } from '../interfaces'
 import { Nft } from './NFT'
+import { Config } from '../models/index.js'
 import { ProviderFees } from '../@types/Provider.js'
 /**
  * ERC20 ROLES
@@ -37,7 +43,7 @@ export class Datatoken {
   public datatokensAbi: AbiItem | AbiItem[]
   public datatokensEnterpriseAbi: AbiItem | AbiItem[]
   public web3: Web3
-  public startBlock: number
+  public config: Config
   public nft: Nft
 
   /**
@@ -49,13 +55,13 @@ export class Datatoken {
     web3: Web3,
     datatokensAbi?: AbiItem | AbiItem[],
     datatokensEnterpriseAbi?: AbiItem | AbiItem[],
-    startBlock?: number
+    config?: Config
   ) {
     this.web3 = web3
     this.datatokensAbi = datatokensAbi || (defaultDatatokensAbi.abi as AbiItem[])
     this.datatokensEnterpriseAbi =
       datatokensEnterpriseAbi || (defaultDatatokensEnterpriseAbi.abi as AbiItem[])
-    this.startBlock = startBlock || 0
+    this.config = config || configHelperNetworks[0]
     this.nft = new Nft(this.web3)
   }
 
@@ -76,7 +82,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     // Estimate gas cost for mint method
     const gasLimitDefault = this.GASLIMIT_DEFAULT
@@ -105,7 +115,10 @@ export class Datatoken {
     amount: string,
     address: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     const estGas = await this.estGasApprove(
       dtAddress,
@@ -121,7 +134,7 @@ export class Datatoken {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -143,7 +156,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -174,7 +191,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
 
@@ -222,7 +243,10 @@ export class Datatoken {
     address: string,
     fixedRateParams: FreCreationParams
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     if (!(await this.isERC20Deployer(dtAddress, address))) {
       throw new Error(`User is not ERC20 Deployer`)
     }
@@ -261,7 +285,7 @@ export class Datatoken {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -283,7 +307,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     if (!dispenserParams.allowedSwapper)
       dispenserParams.allowedSwapper = '0x0000000000000000000000000000000000000000'
@@ -327,7 +355,10 @@ export class Datatoken {
       throw new Error(`User is not ERC20 Deployer`)
     }
 
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     if (!dispenserParams.allowedSwapper)
       dispenserParams.allowedSwapper = '0x0000000000000000000000000000000000000000'
@@ -356,7 +387,7 @@ export class Datatoken {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
     return trxReceipt
   }
@@ -375,7 +406,10 @@ export class Datatoken {
     amount: string,
     toAddress?: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     if ((await this.getDTPermissions(dtAddress, address)).minter !== true) {
       throw new Error(`Caller is not Minter`)
@@ -397,7 +431,7 @@ export class Datatoken {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } else {
@@ -420,7 +454,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     // Estimate gas cost for addMinter method
     const gasLimitDefault = this.GASLIMIT_DEFAULT
@@ -448,7 +486,10 @@ export class Datatoken {
     address: string,
     minter: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     if ((await this.isERC20Deployer(dtAddress, address)) !== true) {
       throw new Error(`Caller is not ERC20Deployer`)
@@ -460,7 +501,7 @@ export class Datatoken {
     const trxReceipt = await dtContract.methods.addMinter(minter).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -481,7 +522,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     // should check ERC20Deployer role using erc721 level ..
 
@@ -513,7 +558,10 @@ export class Datatoken {
     address: string,
     minter: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     if ((await this.isERC20Deployer(dtAddress, address)) !== true) {
       throw new Error(`Caller is not ERC20Deployer`)
@@ -525,7 +573,7 @@ export class Datatoken {
     const trxReceipt = await dtContract.methods.removeMinter(minter).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -546,7 +594,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     // Estimate gas for addFeeManager method
     const gasLimitDefault = this.GASLIMIT_DEFAULT
@@ -575,7 +627,10 @@ export class Datatoken {
     address: string,
     paymentManager: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     if ((await this.isERC20Deployer(dtAddress, address)) !== true) {
       throw new Error(`Caller is not ERC20Deployer`)
@@ -592,7 +647,7 @@ export class Datatoken {
     const trxReceipt = await dtContract.methods.addPaymentManager(paymentManager).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -613,7 +668,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -640,7 +699,10 @@ export class Datatoken {
     address: string,
     paymentManager: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     if ((await this.isERC20Deployer(dtAddress, address)) !== true) {
       throw new Error(`Caller is not ERC20Deployer`)
@@ -659,7 +721,7 @@ export class Datatoken {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -680,7 +742,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -708,7 +774,10 @@ export class Datatoken {
     address: string,
     paymentCollector: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     if ((await this.getDTPermissions(dtAddress, address)).paymentManager !== true) {
       throw new Error(`Caller is not Fee Manager`)
     }
@@ -726,7 +795,7 @@ export class Datatoken {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -737,7 +806,10 @@ export class Datatoken {
    * @return {Promise<string>}
    */
   public async getPaymentCollector(dtAddress: string): Promise<string> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     const paymentCollector = await dtContract.methods.getPaymentCollector().call()
     return paymentCollector
   }
@@ -777,7 +849,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -805,7 +881,10 @@ export class Datatoken {
     amount: string,
     address: string
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     try {
       const estGas = await this.estGasTransfer(
         dtAddress,
@@ -818,7 +897,7 @@ export class Datatoken {
       const trxReceipt = await dtContract.methods.transfer(toAddress, amount).send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
       return trxReceipt
     } catch (e) {
@@ -845,7 +924,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     // Estimate gas for startOrder method
     const gasLimitDefault = this.GASLIMIT_DEFAULT
@@ -875,8 +958,11 @@ export class Datatoken {
     serviceIndex: number,
     providerFees: ProviderFees
   ): Promise<TransactionReceipt> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
-
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
+    
     try {
       const estGas = await this.estGasStartOrder(
         dtAddress,
@@ -892,7 +978,7 @@ export class Datatoken {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -961,7 +1047,7 @@ export class Datatoken {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -1030,7 +1116,7 @@ export class Datatoken {
         .send({
           from: address,
           gas: estGas + 1,
-          gasPrice: await getFairGasPrice(this.web3)
+          gasPrice: await getFairGasPrice(this.web3, this.config)
         })
       return trxReceipt
     } catch (e) {
@@ -1053,7 +1139,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1084,7 +1174,10 @@ export class Datatoken {
       throw new Error(`User is not ERC20 Deployer`)
     }
 
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     const estGas = await this.estGasSetData(dtAddress, address, value, dtContract)
 
@@ -1092,7 +1185,7 @@ export class Datatoken {
     const trxReceipt = await dtContract.methods.setData(value).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -1110,7 +1203,11 @@ export class Datatoken {
     contractInstance?: Contract
   ): Promise<any> {
     const dtContract =
-      contractInstance || new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1139,7 +1236,10 @@ export class Datatoken {
     if ((await this.nft.getNftOwner(await this.getNFTAddress(dtAddress))) !== address) {
       throw new Error('Caller is NOT Nft Owner')
     }
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
 
     const estGas = await this.estGasCleanPermissions(dtAddress, address, dtContract)
 
@@ -1147,7 +1247,7 @@ export class Datatoken {
     const trxReceipt = await dtContract.methods.cleanPermissions().send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -1159,7 +1259,10 @@ export class Datatoken {
    * @return {Promise<Roles>}
    */
   public async getDTPermissions(dtAddress: string, address: string): Promise<Roles> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     const roles = await dtContract.methods.permissions(address).call()
     return roles
   }
@@ -1169,7 +1272,10 @@ export class Datatoken {
    * @return {Promise<string>}
    */
   public async getCap(dtAddress: string): Promise<string> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     const cap = await dtContract.methods.cap().call()
     return this.web3.utils.fromWei(cap)
   }
@@ -1179,7 +1285,10 @@ export class Datatoken {
    * @return {Promise<number>}
    */
   public async getDecimals(dtAddress: string): Promise<string> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     const decimals = await dtContract.methods.decimals().call()
     return decimals
   }
@@ -1189,7 +1298,10 @@ export class Datatoken {
    * @return {Promise<number>}
    */
   public async getNFTAddress(dtAddress: string): Promise<string> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     const nftAddress = await dtContract.methods.getERC721Address().call()
     return nftAddress
   }
@@ -1200,7 +1312,10 @@ export class Datatoken {
    * @return {Promise<boolean>}
    */
   public async isERC20Deployer(dtAddress: string, address: string): Promise<boolean> {
-    const dtContract = new this.web3.eth.Contract(this.datatokensAbi, dtAddress)
+    const dtContract = setContractDefaults(
+      new this.web3.eth.Contract(this.datatokensAbi, dtAddress),
+      this.config
+    )
     const isERC20Deployer = await dtContract.methods.isERC20Deployer(address).call()
     return isERC20Deployer
   }
diff --git a/src/tokens/NFT.ts b/src/tokens/NFT.ts
index 8fc33c270..beaf3dda4 100644
--- a/src/tokens/NFT.ts
+++ b/src/tokens/NFT.ts
@@ -2,9 +2,16 @@ import Web3 from 'web3'
 import { AbiItem } from 'web3-utils'
 import { TransactionReceipt } from 'web3-eth'
 import defaultNftAbi from '../artifacts/templates/ERC721Template.sol/ERC721Template.json'
-import { LoggerInstance, getFairGasPrice, generateDtName } from '../utils'
+import {
+  LoggerInstance,
+  getFairGasPrice,
+  generateDtName,
+  setContractDefaults,
+  configHelperNetworks
+} from '../utils'
 import { Contract } from 'web3-eth-contract'
 import { MetadataProof } from '../../src/@types'
+import { Config } from '../models/index.js'
 
 /**
  * ERC721 ROLES
@@ -23,11 +30,12 @@ export class Nft {
   public nftAbi: AbiItem | AbiItem[]
   public web3: Web3
   public startBlock: number
+  public config: Config
 
-  constructor(web3: Web3, nftAbi?: AbiItem | AbiItem[], startBlock?: number) {
+  constructor(web3: Web3, nftAbi?: AbiItem | AbiItem[], config?: Config) {
     this.nftAbi = nftAbi || (defaultNftAbi.abi as AbiItem[])
     this.web3 = web3
-    this.startBlock = startBlock || 0
+    this.config = config || configHelperNetworks[0]
   }
 
   /**
@@ -61,7 +69,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
     try {
@@ -119,7 +131,10 @@ export class Nft {
     }
 
     // Create 721contract object
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     const estGas = await this.estGasCreateErc20(
       nftAddress,
@@ -148,7 +163,7 @@ export class Nft {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     let tokenAddress = null
@@ -175,7 +190,11 @@ export class Nft {
     contractInstance?: Contract
   ) {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -197,7 +216,10 @@ export class Nft {
    * @return {Promise<TransactionReceipt>} trxReceipt
    */
   public async addManager(nftAddress: string, address: string, manager: string) {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftOwner(nftAddress)) !== address) {
       throw new Error(`Caller is not NFT Owner`)
@@ -209,7 +231,7 @@ export class Nft {
     const trxReceipt = await nftContract.methods.addManager(manager).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -230,7 +252,11 @@ export class Nft {
     contractInstance?: Contract
   ) {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
     try {
@@ -251,7 +277,10 @@ export class Nft {
    * @return {Promise<TransactionReceipt>} trxReceipt
    */
   public async removeManager(nftAddress: string, address: string, manager: string) {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftOwner(nftAddress)) !== address) {
       throw new Error(`Caller is not NFT Owner`)
@@ -268,7 +297,7 @@ export class Nft {
     const trxReceipt = await nftContract.methods.removeManager(manager).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -289,7 +318,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
     try {
@@ -315,7 +348,10 @@ export class Nft {
     address: string,
     erc20Deployer: string
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftPermissions(nftAddress, address)).manager !== true) {
       throw new Error(`Caller is not Manager`)
@@ -335,7 +371,7 @@ export class Nft {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -356,7 +392,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -383,7 +423,10 @@ export class Nft {
     address: string,
     erc20Deployer: string
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if (
       (await this.getNftPermissions(nftAddress, address)).manager !== true ||
@@ -405,7 +448,7 @@ export class Nft {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -426,7 +469,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -452,7 +499,10 @@ export class Nft {
     address: string,
     metadataUpdater: string
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftPermissions(nftAddress, address)).manager !== true) {
       throw new Error(`Caller is not Manager`)
@@ -469,7 +519,7 @@ export class Nft {
     const trxReceipt = await nftContract.methods.addToMetadataList(metadataUpdater).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -490,7 +540,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -517,7 +571,10 @@ export class Nft {
     address: string,
     metadataUpdater: string
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if (
       (await this.getNftPermissions(nftAddress, address)).manager !== true ||
@@ -540,7 +597,7 @@ export class Nft {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -561,7 +618,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -587,7 +648,10 @@ export class Nft {
     address: string,
     storeUpdater: string
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftPermissions(nftAddress, address)).manager !== true) {
       throw new Error(`Caller is not Manager`)
@@ -604,7 +668,7 @@ export class Nft {
     const trxReceipt = await nftContract.methods.addTo725StoreList(storeUpdater).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -625,7 +689,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -651,7 +719,10 @@ export class Nft {
     address: string,
     storeUpdater: string
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if (
       (await this.getNftPermissions(nftAddress, address)).manager !== true ||
@@ -674,7 +745,7 @@ export class Nft {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -693,7 +764,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -721,7 +796,10 @@ export class Nft {
     nftAddress: string,
     address: string
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftOwner(nftAddress)) !== address) {
       throw new Error(`Caller is not NFT Owner`)
@@ -733,7 +811,7 @@ export class Nft {
     const trxReceipt = await nftContract.methods.cleanPermissions().send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -756,7 +834,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -788,7 +870,10 @@ export class Nft {
     nftReceiver: string,
     tokenId?: number
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftOwner(nftAddress)) !== nftOwner) {
       throw new Error(`Caller is not NFT Owner`)
@@ -810,7 +895,7 @@ export class Nft {
       .send({
         from: nftOwner,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -833,7 +918,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -865,7 +954,10 @@ export class Nft {
     nftReceiver: string,
     tokenId?: number
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if ((await this.getNftOwner(nftAddress)) !== nftOwner) {
       throw new Error(`Caller is not NFT Owner`)
@@ -887,7 +979,7 @@ export class Nft {
       .send({
         from: nftOwner,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -917,7 +1009,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -960,7 +1056,10 @@ export class Nft {
     metadataHash: string,
     metadataProofs?: MetadataProof[]
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
     if (!metadataProofs) metadataProofs = []
     if (!(await this.getNftPermissions(nftAddress, address)).updateMetadata) {
       throw new Error(`Caller is not Metadata updater`)
@@ -990,7 +1089,7 @@ export class Nft {
       .send({
         from: address,
         gas: estGas + 1,
-        gasPrice: await getFairGasPrice(this.web3)
+        gasPrice: await getFairGasPrice(this.web3, this.config)
       })
 
     return trxReceipt
@@ -1011,7 +1110,11 @@ export class Nft {
     contractInstance?: Contract
   ): Promise<any> {
     const nftContract =
-      contractInstance || new this.web3.eth.Contract(this.nftAbi, nftAddress)
+      contractInstance ||
+      setContractDefaults(
+        new this.web3.eth.Contract(this.nftAbi, nftAddress),
+        this.config
+      )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1040,7 +1143,10 @@ export class Nft {
     address: string,
     metadataState: number
   ): Promise<TransactionReceipt> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     if (!(await this.getNftPermissions(nftAddress, address)).updateMetadata) {
       throw new Error(`Caller is not Metadata updater`)
@@ -1052,7 +1158,7 @@ export class Nft {
     const trxReceipt = await nftContract.methods.setMetaDataState(metadataState).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
 
     return trxReceipt
@@ -1069,7 +1175,10 @@ export class Nft {
     address: string,
     data: string
   ): Promise<any> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     const gasLimitDefault = this.GASLIMIT_DEFAULT
     let estGas
@@ -1095,13 +1204,16 @@ export class Nft {
     address: string,
     data: string
   ): Promise<any> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
 
     const estGas = await this.estSetTokenURI(nftAddress, address, data)
     const trxReceipt = await nftContract.methods.setTokenURI('1', data).send({
       from: address,
       gas: estGas + 1,
-      gasPrice: await getFairGasPrice(this.web3)
+      gasPrice: await getFairGasPrice(this.web3, this.config)
     })
     return trxReceipt
   }
@@ -1111,7 +1223,10 @@ export class Nft {
    * @return {Promise<string>} string
    */
   public async getNftOwner(nftAddress: string): Promise<string> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
     const trxReceipt = await nftContract.methods.ownerOf(1).call()
     return trxReceipt
   }
@@ -1122,7 +1237,10 @@ export class Nft {
    * @return {Promise<Roles>}
    */
   public async getNftPermissions(nftAddress: string, address: string): Promise<Roles> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
     const roles = await nftContract.methods.getPermissions(address).call()
     return roles
   }
@@ -1132,7 +1250,10 @@ export class Nft {
    * @return {Promise<Objecta>}
    */
   public async getMetadata(nftAddress: string): Promise<Object> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
     return await nftContract.methods.getMetaData().call()
   }
 
@@ -1142,7 +1263,10 @@ export class Nft {
    * @return {Promise<Roles>}
    */
   public async isErc20Deployer(nftAddress: string, address: string): Promise<boolean> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
     const isERC20Deployer = await nftContract.methods.isERC20Deployer(address).call()
     return isERC20Deployer
   }
@@ -1153,7 +1277,10 @@ export class Nft {
    * @return {Promise<string>} The data stored at the key
    */
   public async getData(nftAddress: string, key: string): Promise<string> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
     const data = await nftContract.methods.getData(key).call()
     return data
   }
@@ -1164,7 +1291,10 @@ export class Nft {
    * @return {Promise<string>} The data stored at the key
    */
   public async getTokenURI(nftAddress: string, id: number): Promise<string> {
-    const nftContract = new this.web3.eth.Contract(this.nftAbi, nftAddress)
+    const nftContract = setContractDefaults(
+      new this.web3.eth.Contract(this.nftAbi, nftAddress),
+      this.config
+    )
     const data = await nftContract.methods.tokenURI(id).call()
     return data
   }
diff --git a/src/utils/ConfigHelper.ts b/src/utils/ConfigHelper.ts
index 98278a6f7..0ef433868 100644
--- a/src/utils/ConfigHelper.ts
+++ b/src/utils/ConfigHelper.ts
@@ -17,7 +17,11 @@ const configHelperNetworksBase: Config = {
   poolTemplateAddress: null,
   fixedRateExchangeAddress: null,
   dispenserAddress: null,
-  startBlock: 0
+  startBlock: 0,
+  transactionBlockTimeout: 50,
+  transactionConfirmationBlocks: 1,
+  transactionPollingTimeout: 750,
+  gasFeeMultiplier: 1
 }
 
 export const configHelperNetworks: Config[] = [
@@ -59,7 +63,11 @@ export const configHelperNetworks: Config[] = [
     providerUri: 'https://provider.mainnet.oceanprotocol.com',
     subgraphUri: 'https://subgraph.mainnet.oceanprotocol.com',
     explorerUri: 'https://etherscan.io',
-    startBlock: 11105459
+    startBlock: 11105459,
+    transactionBlockTimeout: 150,
+    transactionConfirmationBlocks: 5,
+    transactionPollingTimeout: 1750,
+    gasFeeMultiplier: 1.05
   },
   {
     ...configHelperNetworksBase,
@@ -117,7 +125,8 @@ export const configHelperNetworks: Config[] = [
     nodeUri: 'https://bsc-dataseed.binance.org',
     providerUri: 'https://provider.bsc.oceanprotocol.com',
     subgraphUri: 'https://subgraph.bsc.oceanprotocol.com',
-    explorerUri: 'https://bscscan.com/'
+    explorerUri: 'https://bscscan.com/',
+    gasFeeMultiplier: 1.05
   },
   {
     ...configHelperNetworksBase,
@@ -135,7 +144,8 @@ export const configHelperNetworks: Config[] = [
     nodeUri: 'https://rpc.energyweb.org',
     providerUri: 'https://provider.energyweb.oceanprotocol.com',
     subgraphUri: 'https://subgraph.energyweb.oceanprotocol.com',
-    explorerUri: 'https://explorer.energyweb.org'
+    explorerUri: 'https://explorer.energyweb.org',
+    gasFeeMultiplier: 1.05
   },
   {
     ...configHelperNetworksBase,
@@ -144,7 +154,8 @@ export const configHelperNetworks: Config[] = [
     nodeUri: 'https://moonriver.api.onfinality.io/public',
     providerUri: 'https://provider.moonriver.oceanprotocol.com',
     subgraphUri: 'https://subgraph.moonriver.oceanprotocol.com',
-    explorerUri: 'https://blockscout.moonriver.moonbeam.network'
+    explorerUri: 'https://blockscout.moonriver.moonbeam.network',
+    gasFeeMultiplier: 1.05
   }
 ]
 
diff --git a/src/utils/ContractParams.ts b/src/utils/ContractUtils.ts
similarity index 68%
rename from src/utils/ContractParams.ts
rename to src/utils/ContractUtils.ts
index 909d6ef2a..419ddabac 100644
--- a/src/utils/ContractParams.ts
+++ b/src/utils/ContractUtils.ts
@@ -1,6 +1,31 @@
-import { Erc20CreateParams, FreCreationParams, PoolCreationParams } from '../interfaces'
 import Web3 from 'web3'
+import BigNumber from 'bignumber.js'
+import { Contract } from 'web3-eth-contract'
 import { generateDtName } from './DatatokenName'
+import { Erc20CreateParams, FreCreationParams, PoolCreationParams } from '../interfaces'
+import { Config } from '../models'
+
+export function setContractDefaults(contract: Contract, config: Config): Contract {
+  if (config) {
+    if (config.transactionBlockTimeout)
+      contract.transactionBlockTimeout = config.transactionBlockTimeout
+    if (config.transactionConfirmationBlocks)
+      contract.transactionConfirmationBlocks = config.transactionConfirmationBlocks
+    if (config.transactionPollingTimeout)
+      contract.transactionPollingTimeout = config.transactionPollingTimeout
+  }
+  return contract
+}
+
+export async function getFairGasPrice(web3: Web3, config: Config): Promise<string> {
+  const x = new BigNumber(await web3.eth.getGasPrice())
+  if (config && config.gasFeeMultiplier)
+    return x
+      .multipliedBy(config.gasFeeMultiplier)
+      .integerValue(BigNumber.ROUND_DOWN)
+      .toString(10)
+  else return x.toString(10)
+}
 
 export function getErcCreationParams(ercParams: Erc20CreateParams): any {
   let name: string, symbol: string
diff --git a/src/utils/GasUtils.ts b/src/utils/GasUtils.ts
deleted file mode 100644
index 90b907db6..000000000
--- a/src/utils/GasUtils.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import BigNumber from 'bignumber.js'
-import Web3 from 'web3'
-
-export async function getFairGasPrice(web3: Web3): Promise<string> {
-  const x = new BigNumber(await web3.eth.getGasPrice())
-  return x.multipliedBy(1.05).integerValue(BigNumber.ROUND_DOWN).toString(10)
-}
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 53e07b209..ceffbf1d0 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -1,7 +1,6 @@
 export * from './Logger'
-export * from './GasUtils'
 export * from './DatatokenName'
-export * from './ContractParams'
+export * from './ContractUtils'
 export * from './FetchHelper'
 export * from './ConfigHelper'
 export * from './DdoHelpers'