npm install @cowprotocol/sdk-viem-adapter viem

import { createPublicClient, http } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { mainnet } from 'viem/chains'
import { ViemAdapter } from '@cowprotocol/sdk-viem-adapter'
import { setGlobalAdapter } from '@cowprotocol/cow-sdk'

// Create a public client (provider)
const publicClient = createPublicClient({
  chain: mainnet,
  transport: http('https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY'),
})

// Create an account from private key
const account = privateKeyToAccount('0x...')

// Create the adapter
const adapter = new ViemAdapter({
  provider: publicClient,
  signer: account,
})

// Set as global adapter
setGlobalAdapter(adapter)

import { createWalletClient, custom } from 'viem'
import { ViemAdapter } from '@cowprotocol/sdk-viem-adapter'

const walletClient = createWalletClient({
  chain: mainnet,
  transport: custom(window.ethereum),
})

const adapter = new ViemAdapter({
  provider: publicClient,
  walletClient,
})

npm install @cowprotocol/sdk-ethers-v6-adapter ethers@^6

import { JsonRpcProvider, Wallet } from 'ethers'
import { EthersV6Adapter } from '@cowprotocol/sdk-ethers-v6-adapter'
import { setGlobalAdapter } from '@cowprotocol/cow-sdk'

// Create provider
const provider = new JsonRpcProvider('https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY')

// Create wallet
const wallet = new Wallet('0x...', provider)

// Create adapter
const adapter = new EthersV6Adapter({
  provider,
  signer: wallet,
})

setGlobalAdapter(adapter)

const adapter = new EthersV6Adapter({
  provider: 'https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY',
  signer: wallet,
})

import { BrowserProvider } from 'ethers'

const provider = new BrowserProvider(window.ethereum)
const signer = await provider.getSigner()

const adapter = new EthersV6Adapter({
  provider,
  signer,
})

npm install @cowprotocol/sdk-ethers-v5-adapter ethers@^5

import { ethers } from 'ethers'
import { EthersV5Adapter } from '@cowprotocol/sdk-ethers-v5-adapter'
import { setGlobalAdapter } from '@cowprotocol/cow-sdk'

// Create provider
const provider = new ethers.providers.JsonRpcProvider(
  'https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY'
)

// Create wallet
const wallet = new ethers.Wallet('0x...', provider)

// Create adapter
const adapter = new EthersV5Adapter({
  provider,
  signer: wallet,
})

setGlobalAdapter(adapter)

const provider = new ethers.providers.Web3Provider(window.ethereum)
const signer = provider.getSigner()

const adapter = new EthersV5Adapter({
  provider,
  signer,
})

// Get network chain ID
await adapter.getChainId()

// Get contract bytecode
await adapter.getCode(address)

// Get transaction receipt
await adapter.getTransactionReceipt(hash)

// Read contract data
await adapter.readContract({
  address: contractAddress,
  abi: contractAbi,
  functionName: 'balanceOf',
  args: [userAddress],
})

// Get contract instance
const contract = adapter.getContract(address, abi)

// Access the signer
const signer = adapter.signer

// Get signer address
const address = await signer.getAddress()

// Sign typed data (EIP-712)
const signature = await signer.signTypedData(
  domain,
  types,
  message
)

// Send transaction
const tx = await signer.sendTransaction({
  to: recipientAddress,
  value: amount,
})

// Create adapter without signer
const adapter = new ViemAdapter({ provider: publicClient })
setGlobalAdapter(adapter)

// Later, set the signer
const account = privateKeyToAccount('0x...')
adapter.setSigner(account)