Integrate using viem

SatLayer’s smart contracts are built for EVM compatibility, allowing them to integrate with the existing EVM developer ecosystem. This means that standard EVM frameworks, libraries, and tools—such as Ethers.js and Viem—can be used without modification, enabling developers to leverage familiar workflows and infrastructure.

To integrate EVM contracts through Viem :

viem


npm i viem

Also, add @satlayer/contracts, which provides ABI for SatLayer EVM contracts to the project.

SLAYContracts


npm i @satlayer/contracts

Create wallet clients

In this example, we set up a wallet client using a private key:

privateKeyBasedWalletClient.js


import { createWalletClient, http, publicActions } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { mainnet } from 'viem/chains'
 
const privateKey = "0x..." // replace with your private key.
const account = privateKeyToAccount(privateKey)
 
const client = createWalletClient({
  account,
  chain: mainnet,
  transport: http()
}).extend(publicActions)

Or create a client by providing mnemonics

mnemonicBasedWalletClient.js


import { mnemonicToAccount } from 'viem/accounts';
import { mainnet } from 'viem/chains';
import { createWalletClient, http, publicActions } from 'viem'
 
// Replace with your 12-word or 24-word mnemonic phrase
const mnemonic = "your mnemonic sequence here";
 
// Derive the account from the mnemonic
const account = mnemonicToAccount(mnemonic);
 
 
const client = createWalletClient({
  account,
  chain: mainnet,
  transport: http()
}).extend(publicActions)

Interacting with contracts

Executing a transaction is also fairly straightforward. The following snippet will demonstrate interacting with the SLAYRegistry contract to register yourself (or more accurately, your EOA) as an operator:

execute.js


import { createWalletClient, http, publicActions } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { abi } from '@satlayer/contracts/out/SLAYRegistryV2.sol/SLAYRegistryV2.json'
 
const privateKey = "0x..." // replace with your private key
const account = privateKeyToAccount(privateKey)
 
const client = createWalletClient({
  account,
  chain: mainnet,
  transport: http()
}).extend(publicActions)
 
 
const contractAddress = "0x.."; // replace the content inside double quotes with live/testnet SLAYRegistryV2 contract address.
 
const transactionHash = await client.writeContract({
  address: contractAddress,
  abi: abi,
  functionName: 'registerAsOperator',
  args: ['www.exampleOperator.com', 'An example operator'],
  account: account
});

In an actual production software, sensitive information like private keys and mnemonic sequence should not be hardcoded.

For a more in-depth guide to creating software using Viem, please refer to the Viem official documentation .