Deploy and Verify

Deploying and verifying smart contracts on Sei with viem, ethers, Foundry, and Hardhat

Deploy and Verify

Sei is EVM-compatible — standard deployment tooling works without modification. This page covers deploying a contract and verifying its source on the Sei block explorer.

For a deeper look at verification options (Remix, Sourcify UI, batch verification), see the Verify Contracts page.

Deploying with viem or ethers

viem

import { createPublicClient, createWalletClient, http } from 'viem';
import { privateKeyToAccount } from 'viem/accounts';
import { sei } from '@sei-js/precompiles/viem';

const account = privateKeyToAccount('0xYourPrivateKey');
const publicClient = createPublicClient({ chain: sei, transport: http() });
const walletClient = createWalletClient({ account, chain: sei, transport: http() });

const hash = await walletClient.deployContract({
  abi: CONTRACT_ABI,
  bytecode: '0x608060...',
  args: [/* constructor args */],
});

const { contractAddress } = await publicClient.waitForTransactionReceipt({ hash });
console.log('Deployed at:', contractAddress);

Deploying with Foundry

Foundry works against Sei with the standard --rpc-url flag.

forge create src/MyContract.sol:MyContract \
  --rpc-url https://evm-rpc.sei-apis.com \
  --private-key $PRIVATE_KEY \
  --constructor-args arg1 arg2

For testnet:

forge create src/MyContract.sol:MyContract \
  --rpc-url https://evm-rpc-testnet.sei-apis.com \
  --private-key $PRIVATE_KEY

Deploying with Hardhat

Add Sei networks to your hardhat.config.ts:

import { HardhatUserConfig } from 'hardhat/config';

const config: HardhatUserConfig = {
  networks: {
    sei: {
      url: 'https://evm-rpc.sei-apis.com',
      chainId: 1329,
      accounts: [process.env.PRIVATE_KEY!],
    },
    seiTestnet: {
      url: 'https://evm-rpc-testnet.sei-apis.com',
      chainId: 1328,
      accounts: [process.env.PRIVATE_KEY!],
    },
  },
};

export default config;

Then deploy:

npx hardhat run scripts/deploy.ts --network sei

Verifying Contracts

Sei’s block explorer is Seiscan. The recommended verification method is Sourcify — no API key required.

Foundry

Verify after deployment:

forge verify-contract \
  --verifier sourcify \
  --chain-id 1329 \
  0xDeployedContractAddress \
  src/MyContract.sol:MyContract

Or deploy and verify in one step:

forge create src/MyContract.sol:MyContract \
  --rpc-url https://evm-rpc.sei-apis.com \
  --private-key $PRIVATE_KEY \
  --verify \
  --verifier sourcify \
  --chain-id 1329

For testnet, use --chain-id 1328 and --rpc-url https://evm-rpc-testnet.sei-apis.com.

Hardhat

Install the verify plugin:

npm install --save-dev @nomicfoundation/hardhat-verify

Add it to hardhat.config.ts — no additional Sourcify config block is needed:

import '@nomicfoundation/hardhat-verify';

const config: HardhatUserConfig = {
  networks: {
    sei: {
      url: 'https://evm-rpc.sei-apis.com',
      chainId: 1329,
      accounts: [process.env.PRIVATE_KEY!],
    },
    seiTestnet: {
      url: 'https://evm-rpc-testnet.sei-apis.com',
      chainId: 1328,
      accounts: [process.env.PRIVATE_KEY!],
    },
  },
};

Verify a deployed contract:

npx hardhat verify sourcify --network sei 0xDeployedContractAddress

If your contract has constructor arguments:

npx hardhat verify sourcify --network sei 0xDeployedContractAddress "arg1" "arg2"

Network Reference

Network	Chain ID	RPC	Explorer
Mainnet	1329	https://evm-rpc.sei-apis.com	seiscan.io
Testnet	1328	https://evm-rpc-testnet.sei-apis.com	testnet.seiscan.io
Devnet	713715	https://evm-rpc-arctic-1.sei-apis.com	—