diff --git a/typescript-sdk/playground/holesky-to-babylon.ts b/typescript-sdk/playground/holesky-to-babylon.ts
new file mode 100644
index 0000000000..07acf6f2f9
--- /dev/null
+++ b/typescript-sdk/playground/holesky-to-babylon.ts
@@ -0,0 +1,104 @@
+import { http } from "viem"
+import { parseArgs } from "node:util"
+import { consola } from "scripts/logger"
+import { bech32AddressToHex, createUnionClient } from "#mod.ts"
+import {
+  getChannelInfo,
+  getQuoteToken,
+  getRecommendedChannels
+} from "#query/offchain/ucs03-channels"
+import { privateKeyToAccount } from "viem/accounts"
+
+// hack to encode bigints to json
+declare global {
+  interface BigInt {
+    toJSON: () => string
+  }
+}
+
+if (!BigInt.prototype.toJSON) {
+  Object.defineProperty(BigInt.prototype, "toJSON", {
+    value: function () {
+      return this.toString()
+    },
+    writable: true,
+    configurable: true
+  })
+}
+// end hack
+
+const cliArgs = parseArgs({
+  args: process.argv.slice(2),
+  options: {
+    "private-key": { type: "string" },
+    "estimate-gas": { type: "boolean", default: false }
+  }
+})
+
+const PRIVATE_KEY = cliArgs.values["private-key"]
+const UBBN_DENOM = "0x2520a4568143de9287ea8089aea59434e072363e" // wrapped ubbn on holesky
+const AMOUNT = 1n
+const RECEIVER = bech32AddressToHex({ address: "bbn14vcpe0yt8xdzaapm8yy6tm26sf45rdgu4u2ka9" })
+const SOURCE_CHAIN_ID = "17000"
+const DESTINATION_CHAIN_ID = "bbn-test-5"
+
+const channels = await getRecommendedChannels()
+
+const channel = getChannelInfo(SOURCE_CHAIN_ID, DESTINATION_CHAIN_ID, channels)
+if (channel === null) {
+  consola.info("no channel found")
+  process.exit(1)
+}
+
+consola.info("channel", channel)
+
+const quoteToken = await getQuoteToken(SOURCE_CHAIN_ID, UBBN_DENOM, channel)
+if (quoteToken.isErr()) {
+  consola.info("could not get quote token")
+  consola.error(quoteToken.error)
+  process.exit(1)
+}
+
+consola.info("quote token", quoteToken.value)
+
+const transferArgs = {
+  baseToken: UBBN_DENOM,
+  baseAmount: AMOUNT,
+  quoteToken: quoteToken.value.quote_token,
+  quoteAmount: AMOUNT,
+  receiver: RECEIVER,
+  sourceChannelId: channel.source_channel_id,
+  ucs03address: `0x${channel.source_port_id}`
+}
+
+consola.info("transfer args", transferArgs)
+
+if (!PRIVATE_KEY) {
+  consola.error("no private key provided")
+  process.exit(1)
+}
+
+const evmClient = createUnionClient({
+  chainId: SOURCE_CHAIN_ID,
+  account: privateKeyToAccount(`0x${PRIVATE_KEY}`),
+  transport: http("https://rpc.17000.holesky.chain.kitchen")
+})
+
+const approveResponse = await evmClient.approveErc20(transferArgs)
+
+if (approveResponse.isErr()) {
+  consola.error(approveResponse.error)
+  process.exit(1)
+}
+
+consola.info("approval tx hash", approveResponse.value)
+
+const transfer = await evmClient.transferAsset(transferArgs)
+
+if (transfer.isErr()) {
+  consola.info("transfer submission failed")
+  consola.error(transfer.error)
+  process.exit(1)
+}
+
+consola.info("transfer tx hash", transfer.value)