Dvm builders doc

docs/builders/_category_.json

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+{
+  "label": "Builders",
+  "position": 5
+}

docs/builders/get-started/_category_.json

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+{
+  "label": "Get Started",
+  "position": 1
+}

docs/builders/get-started/darwinia-crab.md

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+---
+title: Connect to Crab
+sidebar_position: 3
+description: How to connect to crab network.
+---
+
+# Connect to Crab
+
+## Introduction
+
+Darwinia Crab Network (Crab) is a canary network with real economic value for Darwinia, and its positioning is similar to Polkadot's Kusama Network.
+
+Crab has two endpoints available for users to connect to: one for HTTPS and one for WSS.
+
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
+<Tabs
+  defaultValue="wss"
+  values={[
+    {label: 'WSS Entry', value: 'wss'},
+    {label: 'HTTPS Entry', value: 'https'},
+  ]}>
+
+  <TabItem value="https">
+
+```
+https://crab-rpc.darwinia.network
+```
+
+  </TabItem>
+  <TabItem value="wss">
+
+```
+wss://crab-rpc.darwinia.network
+```
+
+   </TabItem>
+</Tabs>
+
+## Features
+
+- Compatible with EVM, Ethereum contracts, Ethereum contract tools.
+- Support ethereum-substrate bi-directional bridge

docs/builders/get-started/darwinia-dev.md

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+---
+title: Development Node
+sidebar_position: 1
+description: How to setup a Darwinia Development Node.
+---
+
+# Getting Started with a Darwinia Development Node
+
+## Introduction
+
+This guide outlines the steps needed to create a development node for latest features of Darwinia.
+
+A Darwinia development node is your own personal development environment for building and testing applications on Darwinia. For Ethereum developers, it is comparable to Ganache. If you follow to the end of this guide, you will have a Darwinia development node running in your local environment, and will be able to connect it to the default Darwinia Apps GUI.
+
+## Getting Started With The Binary
+
+> If you know what you are doing, you can directly download the precompiled binaries attached to each release on the [Darwinia Release Page](https://github.com/darwinia-network/darwinia-common/releases). These will not work in all systems. For example, the binaries only work with x86-64 Linux with specific versions of dependencies. The safest way to ensure compatibility is to compile the binary in the system where it will be run from.
+
+First, start by cloning the [darwinia-common](https://github.com/darwinia-network/darwinia-common) codebase:
+
+```
+git clone https://github.com/darwinia-network/darwinia-common
+cd darwinia-common
+```
+
+If you already have Rust installed, you can skip the next two steps. Otherwise, install Rust and its prerequisites [via Rust's recommended method](https://www.rust-lang.org/tools/install) by executing:
+
+```
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+```
+
+Next, update your PATH environment variable by running:
+
+```
+source $HOME/.cargo/env
+```
+
+Now, build the development node by running:
+
+```
+cargo build --release
+```
+
+If a _cargo not found error_ shows up in the terminal, manually add Rust to your system path or restart your system:
+```
+source $HOME/.cargo/env
+```
+
+> The initial build will take a while. Depending on your hardware, you should expect approximately 30 minutes for the build process to finish.
+
+Here is what the tail end of the build output should look like:
+
+![End of build output](/images/setting-up-a-node/setting-up-node-3.png)
+
+Then, you will want to run the node in dev mode using the following command:
+
+```
+./target/release/drml --dev --tmp
+```
+
+> For people not familiar with Substrate, the `--dev` flag is a way to run a Substrate-based node in a single node developer configuration for testing purposes. You can learn more about `--dev` in [this Substrate tutorial](https://substrate.dev/docs/en/tutorials/create-your-first-substrate-chain/interact).
+
+You should see an output that looks like the following, showing some blocks has been produced:
+
+![Output shows blocks being produced](/images/setting-up-a-node/setting-up-node-4.png)
+
+For more information on some of the flags and options used in the example, check out [Common Options](#common-options). If you want to see a complete list of all of the flags, options, and subcommands, open the help menu by running:
+
+```
+./target/release/drml --help
+```
+## Connecting To Darwinia Apps
+
+Start by connecting to it with [Darwinia Apps Explorer](https://apps.darwinia.network/?rpc%3Dwss%253A%252F%252Fpangolin-rpc.darwinia.network#/explorer). This will automatically connects to Pangolin TestNet.
+
+![Polkadot JS Apps](/images/setting-up-a-node/setting-up-node-5.png)
+
+Click on the top left corner to open the menu to configure the networks, and then navigate down to open the Development sub-menu. In there, you will want to toggle the "Local Node" option, which points to `ws://127.0.0.1:9944`. Next, select the "Save & Reload" button, and the site should connect to your Darwinia development node.
+
+![Select Local Node](/images/setting-up-a-node/setting-up-node-6.png)
+
+With Darwinia Apps connected, you will see the the development node has began producing blocks.
+
+![Select Local Node](/images/setting-up-a-node/setting-up-node-7.png)
+
+## Common Options
+
+Flags do not take an argument. To use a flag, add it to the end of a command. For example:
+
+```
+./target/release/drml --dev --tmp
+```
+
+- `--dev`: Specifies the development chain
+- `--no-telemetry`: Disable connecting to the Substrate telemetry server. For global chains, telemetry is on by default. Telemetry is unavailable if you are running a development (`--dev`) node.
+- `--tmp`: Runs a temporary node in which all of the configuration will be deleted at the end of the process
+- `--rpc-external`: Listen to all RPC interfaces
+- `--ws-external`: Listen to all Websocket interfaces
+
+For a complete list of flags and options, spin up your Darwinia development node with `--help` added to the end of the command.
+## Pre-funded Development Accounts
+
+Your Darwinia development node comes with some pre-funded substrate accounts for development. There are two test accounts are derived from Substrate's canonical development mnemonic:
+
+```
+bottom drive obey lake curtain smoke basket hold race lonely fit walk
+```
+
+- Alice:
+    - Public Address: `2sy7imEZs1Y9GgYrR5Vqkb8EZTmpv2BKr5QNRzB9gkzdAEU2`
+    - Private Key: `0xe5be9a5092b81bca64be81d212e7f2f9eba183bb7a90954f7b76361f6edb5c0a`
+
+- Bob
+    - Public Address: `2rPxSh4RjHYF7g4Lz9Xu1FDGTckwTUmzMFG3Nd3Ucn5PPKJr`
+    - Private Key: `0x398f0c28f98885e046333d4a41c19cee4c37368a9832c6502f6cfd182e2aef89`
+
+Also, included with the development node is a prefunded evm account used for testing purposes:
+
+- Public Address: `0x6be02d1d3665660d22ff9624b7be0551ee1ac91b`
+- Private Key: `0x99b3c12287537e38c90a9219d4cb074a89a16e9cdb20bf85728ebd97c343e342`

docs/builders/get-started/darwinia-pangolin.md

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+---
+title: Connect to Pangolin
+sidebar_position: 2
+description: How to connect to Pangolin network
+---
+
+# Connect to Pangolin
+
+## Introduction
+
+The Darwinia official TestNet, named Pangolin, is the easiest way to get started with a Darwinia network environment. Follow this tutorial to connect to the Pangolin network.
+
+The Pangolin Network has two endpoints available for users to connect to: one for HTTPS and one for WSS.
+
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
+<Tabs
+  defaultValue="wss"
+  values={[
+    {label: 'WSS Entry', value: 'wss'},
+    {label: 'HTTPS Entry', value: 'https'},
+  ]}>
+
+  <TabItem value="https">
+
+```
+https://pangolin-rpc.darwinia.network
+```
+
+  </TabItem>
+  <TabItem value="wss">
+
+```
+wss://pangolin-rpc.darwinia.network
+```
+
+   </TabItem>
+</Tabs>
+
+## Features
+
+- Testing the latest technology products.
+- Compatible with EVM, Ethereum contracts, Ethereum contract tools.
+- Support substrate-substrate bi-directional bridge
+- Support ethereum-substrate bi-directional bridge.
+- Have some unstable features, may be reset.
+
+## Get Tokens
+
+To start building on Pangolin, you can get DEV tokens(PRING) from our [Pangolin Faucet Official](https://t.me/darwiniafaucet_official), in our Tg Group. For specific amounts, you can always reach out directly to us via our community channels.
+
+### Pangolin Faucet Official
+
+- Visit [Pangolin Apps Portal](https://apps.darwinia.network/#/account) and select the **Pangolin Test Network** in the network list in the upper left corner.
+
+![01](/images/started/connect-pangolin/pangolin-01.png)
+
+- Create an account on Pangolin Test Network. For detailed tutorials on creating an account, please refer to [here](https://docs.crab.network/crab-tut-create-account)!
+- Click the avatar and you can copy your Pangolin address.
+
+![02](/images/started/connect-pangolin/pangolin-02.png)
+
+- Join the Telegram group named "[Darwinia Faucet Official](https://t.me/darwiniafaucet_official)".
+- Send `/faucet`+ Pangolin address.
+
+![03](/images/started/connect-pangolin/pangolin-03.png)
+
+- You can open the link of the darwinia_bot to check the transaction on Subscan.
+
+![04](/images/started/connect-pangolin/pangolin-04.png)
+
+![05](/images/started/connect-pangolin/pangolin-05.png)
+
+- When the transaction is successful, a certain number of test tokens will appear in your pangolin address.
+
+![06](/images/started/connect-pangolin/pangolin-06.png)
+
+- Each telegram account can get 100 PRINGs every seven days.
+
+### Manual Procedure
+
+For token requests of more than the limited account allowed by our Tg group, contact a moderator directly via our [Element](https://app.element.io/?pk_vid=6961ca0f7c45f8bf16052310122d2437#/room/#darwinia:matrix.org). We are happy to provide the tokens needed to test your applications.

docs/builders/integrations/_category_.json

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+{
+  "label": "Interaction",
+  "position": 4
+}

docs/builders/integrations/bridges/_category_.json

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+{
+  "label": "Bridges",
+  "position": 1
+}

docs/pangolin-bridge-ropsten.md → docs/builders/integrations/bridges/pangolin-ropsten.md

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 ---
 id: pangolin-bridge-ropsten
 title: Ropsten Bridge
+sidebar_position: 1
 sidebar_label: Ropsten Bridge
 ---
 
 ## Pangolin > Ropsten
 
 ### Relay Contract
 
-1. Relayer sends `Authority Set` change 
+1. Relayer sends `Authority Set` change
 2. Relayer listens to the `Authority Set` changed event
 
 ```
 address: 0xD35Bb6F1bc1C84b53E0995c1830454AB7C4147f1
   topic: 0x91d6d149c7e5354d1c671fe15a5a3332c47a38e15e8ac0339b24af3c1090690f
 ```
-	
+
 ### TokenIssuing Contract
 
 User claims RING & KTON
@@ -34,4 +35,4 @@ address: 0x98fAE9274562FE131e2CF5771ebFB0bB232aFd25
 ```
 address: 0x49262b932e439271d05634c32978294c7ea15d0c
   topic: 0xc9dcda609937876978d7e0aa29857cb187aea06ad9e843fd23fd32108da73f10
-```
+```

docs/builders/integrations/indexers/_category_.json

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+{
+  "label": "Indexers",
+  "position": 1
+}