typescript-sdk

Union Labs TypeScript SDK

Union Labs TypeScript SDK providing utilities for cross-chain transfers and more.

npm install @unionlabs/client

Development

Publishing

Publish to npm registry:

npm publish --access='public' --no-git-tags

Publish to JSR:

bun ./scripts/publish.ts

Usage

Initiate a client

import { privateKeyToAccount } from "viem/accounts"
import { createUnionClient, http } from "@unionlabs/client"

const client = createUnionClient({
  chainId: "80084",
  transport: http("https://bartio.rpc.berachain.com"),
  account: privateKeyToAccount(`0x${process.env.PRIVATE_KEY}`),
})

Examples

Transfer strd from Stride Testnet on Cosmos (stride-internal-1) chain to Sepolia on EVM (1111551111) chain.

import { DirectSecp256k1Wallet } from "@cosmjs/proto-signing"
import { createUnionClient, hexToBytes, http } from "@unionlabs/client"

const PRIVATE_KEY = process.env["PRIVATE_KEY"]
if (!PRIVATE_KEY) throw new Error("Private key not found")

const cosmosAccount = await DirectSecp256k1Wallet.fromKey(
  Uint8Array.from(hexToBytes(PRIVATE_KEY)),
  "stride"
)

const client = createUnionClient({
  account: cosmosAccount,
  chainId: "stride-internal-1",
  transport: http("stride.testnet-1.stridenet.co")
})

const transfer = await client.transferAsset({
  amount: 1n,
  autoApprove: true,
  denomAddress: "strd",
  destinationChainId: "11155111",
  receiver: "0x8478B37E983F520dBCB5d7D3aAD8276B82631aBd"
})

if (transfer.isErr()) {
  console.error(transfer.error)
  process.exit(1)
}

console.info(transfer.value)