;
};
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](/evm/evm-verify-contracts) page.
## Try it: deploy from your browser
No local toolchain required — compile and deploy a contract to Sei testnet straight from the browser. The Remix sandbox below preloads a minimal `Counter.sol`.
First, add Sei testnet to your wallet:
Then in Remix: compile under the **Solidity Compiler** tab, open **Deploy & Run**, set **Environment** to **Injected Provider — MetaMask**, and click **Deploy**. Sei has instant finality, so the deployment confirms in well under a second.
## Deploying with viem or ethers
```ts viem theme={"dark"}
import { createPublicClient, createWalletClient, http } from 'viem';
import { privateKeyToAccount } from 'viem/accounts';
import { sei } from 'viem/chains';
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);
```
```ts ethers theme={"dark"}
import { ethers } from 'ethers';
const provider = new ethers.JsonRpcProvider('https://evm-rpc.sei-apis.com');
const wallet = new ethers.Wallet('0xYourPrivateKey', provider);
const factory = new ethers.ContractFactory(CONTRACT_ABI, '0x608060...', wallet);
const contract = await factory.deploy(/* constructor args */);
await contract.waitForDeployment();
console.log('Deployed at:', await contract.getAddress());
```
## Deploying with Foundry
Foundry works against Sei with the standard `--rpc-url` flag.
```bash theme={"dark"}
forge create src/MyContract.sol:MyContract \
--rpc-url https://evm-rpc.sei-apis.com \
--private-key $PRIVATE_KEY \
--constructor-args arg1 arg2
```
For testnet:
```bash theme={"dark"}
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` (Hardhat 3). Keep the toolbox in the `plugins` array — it ships with projects created by `npx hardhat --init` and provides Hardhat Ignition for deployments:
```ts theme={"dark"}
import { defineConfig, configVariable } from 'hardhat/config';
import hardhatToolboxMochaEthers from '@nomicfoundation/hardhat-toolbox-mocha-ethers';
export default defineConfig({
networks: {
sei: {
type: 'http',
chainId: 1329,
url: 'https://evm-rpc.sei-apis.com',
accounts: [configVariable('SEI_PRIVATE_KEY')],
},
seiTestnet: {
type: 'http',
chainId: 1328,
url: 'https://evm-rpc-testnet.sei-apis.com',
accounts: [configVariable('SEI_PRIVATE_KEY')],
},
},
plugins: [hardhatToolboxMochaEthers],
});
```
Store your private key in Hardhat's encrypted keystore so it never lives in a plaintext file:
```bash theme={"dark"}
npx hardhat keystore set SEI_PRIVATE_KEY
```
Describe the deployment in a minimal Ignition module at `ignition/modules/MyContract.ts`:
```ts theme={"dark"}
import { buildModule } from '@nomicfoundation/hardhat-ignition/modules';
export default buildModule('MyContractModule', (m) => {
const myContract = m.contract('MyContract', [/* constructor args */]);
return { myContract };
});
```
Then deploy it:
```bash theme={"dark"}
npx hardhat ignition deploy ignition/modules/MyContract.ts --network sei
```
## Verifying Contracts
Sei's block explorer is [Seiscan](https://seiscan.io). The recommended verification method is [Sourcify](https://sourcify.dev/) — no API key required.
### Foundry
Verify after deployment:
```bash theme={"dark"}
forge verify-contract \
--verifier sourcify \
--chain-id 1329 \
0xDeployedContractAddress \
src/MyContract.sol:MyContract
```
Or deploy and verify in one step:
```bash theme={"dark"}
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
If you use a Hardhat toolbox (as in the config above), `hardhat-verify` is already bundled and active — skip ahead to the verify command. Without a toolbox, install the plugin:
```bash theme={"dark"}
npm install --save-dev @nomicfoundation/hardhat-verify
```
Then add it to the `plugins` array in `hardhat.config.ts` — Sourcify verification is enabled by default in `hardhat-verify` and needs no API key:
```ts theme={"dark"}
import { defineConfig, configVariable } from 'hardhat/config';
import hardhatVerify from '@nomicfoundation/hardhat-verify';
export default defineConfig({
networks: {
sei: {
type: 'http',
chainId: 1329,
url: 'https://evm-rpc.sei-apis.com',
accounts: [configVariable('SEI_PRIVATE_KEY')],
},
seiTestnet: {
type: 'http',
chainId: 1328,
url: 'https://evm-rpc-testnet.sei-apis.com',
accounts: [configVariable('SEI_PRIVATE_KEY')],
},
},
plugins: [hardhatVerify],
});
```
Verify a deployed contract on Sourcify:
```bash theme={"dark"}
npx hardhat verify sourcify --network sei 0xDeployedContractAddress
```
If your contract has constructor arguments:
```bash theme={"dark"}
npx hardhat verify sourcify --network sei 0xDeployedContractAddress "arg1" "arg2"
```
Running `npx hardhat verify` without the `sourcify` subtask attempts verification on all enabled providers (Etherscan, Blockscout, and Sourcify) in a single run.
## Network Reference
| Network | Chain ID | RPC | Explorer |
| ------- | -------- | --------------------------------------- | ------------------------------------------------ |
| Mainnet | 1329 | `https://evm-rpc.sei-apis.com` | [seiscan.io](https://seiscan.io) |
| Testnet | 1328 | `https://evm-rpc-testnet.sei-apis.com` | [testnet.seiscan.io](https://testnet.seiscan.io) |
| Devnet | 713715 | `https://evm-rpc-arctic-1.sei-apis.com` | — |