​

Features

• esm or commonjs
• first class support for coinbase smart wallet and paymasters
• ens name resolution
• small bundle size and minimal dependencies
• gas estimation and calldata generation for every transaction

​

Installation

yarn add @tx-kit/sdk viem 

​

Import

The SDK is built for both esm and commonjs environments

import * from '@tx-kit/sdk'

const sdk = require('@tx-kit/sdk')

​

Transmissions Client

The SDK provides a client that can be used to interact with the transmissions protocol. The client is initialized with a configuration object and provides 2 sub-clients for uplink and downlink interactions. The uplink client is used to write data to the protocol, while the downlink client is used to read data from the protocol subgraph.

​

Usage

const { uplinkClient, downlinkClient } = new TransmissionsClient({
    chainId: number,
    publicClient?: PublicClient<Transport, Chain>,
    walletClient?: WalletClient<Transport, Chain, Account>,
    apiConfig?: ApiConfig,
    paymasterConfig?: PaymasterConfig
})

​

Returns

{
    uplinkClient: UplinkClient, // write client
    downlinkClient: DownlinkClient // read client
}

​

Parameters

​

chainId

• type: 8453 | 84532

The chain id of the target chain

const txClient = new TransmissionsClient({
    chainId: 8453
    ...
})

​

publicClient (optional)

• type: PublicClient<Transport, Chain>

The public client to use for public data requests. Some methods require a public client to be provided.

import { createPublicClient, http } from 'viem'

const publicClient: createPublicClient({
    chain: base,
    transport: http()
})

const txClient = new TransmissionsClient({
    publicClient
    ...
})

​

walletClient (optional)

• type: WalletClient<Transport, Chain, Account>

The wallet client to use for modifying blockchain state. Most uplink methods require a wallet client to be provided.

import { createWalletClient, http } from 'viem'

const walletClient: createWalletClient({
    chain: base,
    transport: http(),
    account: Account // from local private key or browser wallet
})

const txClient = new TransmissionsClient({
    walletClient
    ...
})

​

apiConfig (optional)

• type: ApiConfig

type ApiConfig = {
    serverUrl?: string
}

The api configuration object for the downlink client. This object contains the server url for the subgraph. The default value is the base mainnet subgraph url.

const txClient = new TransmissionsClient({
    apiConfig: {
        serverUrl: BASE_SEPOLIA_SUBGRAPH_URL
    }
    ...
})

​

paymasterConfig (optional)

• type: PaymasterConfig

type PaymasterConfig = {
    paymasterUrl?: string
}

The paymaster configuration object for the wallet client. This object contains the paymaster url for a paymaster proxy. The default value is undefined. See the paymasters section of the coinbase smart wallet docs.

const txClient = new TransmissionsClient({
    paymasterConfig: {
        paymasterUrl: 'https://example_server/paymaster_proxy'
    }
    ...
})