Using Ledger wallet with ethers on Sei

Prerequisites:

Make sure you have a Ethereum app installed on your Ledger device.
Enable blind signing in the Ethereum app settings (needed for precompile examples and working with contracts in general).
Linux users may need to add a udev rule to allow access to the device. You can find the script to add a rule in the Ledger repo here .

Sending funds example


import { LedgerSigner } from '@ethers-ext/signer-ledger';
import Transport from '@ledgerhq/hw-transport-node-hid';
import { ethers } from 'ethers';
 
const send = async (signer: LedgerSigner, amount: string, toAddress: string) => {
  // Create a transaction
  const transaction = {
    to: toAddress,
    value: ethers.parseEther(amount),
    gasPrice: ethers.parseUnits('200', 'gwei')
  };
 
  // Send the transaction
  signer.sendTransaction(transaction).then((tx) => {
    console.log(tx);
  });
};
 
const testApp = async () => {
  const rpcUrl = 'https://evm-rpc-testnet.sei-apis.com';
 
  const provider = new ethers.JsonRpcProvider(rpcUrl);
  const signer = new LedgerSigner(Transport, provider);
 
  await send(signer, '5', '<0xAddress>'); // Send 5 Sei
};

Send funds to native Sei address via precompile


import { LedgerSigner } from '@ethers-ext/signer-ledger';
import Transport from '@ledgerhq/hw-transport-node-hid';
import { ethers } from 'ethers';
 
import { BANK_PRECOMPILE_ABI, BANK_PRECOMPILE_ADDRESS } from '@sei-js/evm';
 
const sendNative = async (signer: LedgerSigner, amount: string, nativeAddress: string) => {
  const contract = new ethers.Contract(BANK_PRECOMPILE_ADDRESS, BANK_PRECOMPILE_ABI, signer);
  const overrides = {
    value: ethers.parseEther(amount)
  };
 
  try {
    const result = await contract.sendNative(nativeAddress, overrides);
    console.log('SendNativeResult: ', result);
  } catch (e) {
    console.log(e);
  }
};
 
const testApp = async () => {
  const rpcUrl = 'https://evm-rpc-testnet.sei-apis.com';
 
  const nativeAddress = 'seiAddress';
  const provider = new ethers.JsonRpcProvider(rpcUrl);
  const signer = new LedgerSigner(Transport, provider);
 
  await sendNative(signer, '5', nativeAddress);
};

Staking via precompile example


import { LedgerSigner } from '@ethers-ext/signer-ledger';
import Transport from '@ledgerhq/hw-transport-node-hid';
import { ethers, toUtf8String } from 'ethers';
 
import { STAKING_PRECOMPILE_ABI, STAKING_PRECOMPILE_ADDRESS } from '@sei-js/evm';
 
const stake = async (signer: LedgerSigner, amount: string, fromAddress: string, validatorAddress: string) => {
  const contract = new ethers.Contract(STAKING_PRECOMPILE_ADDRESS, STAKING_PRECOMPILE_ABI, signer);
  const overrides = {
    from: fromAddress,
    value: ethers.parseEther(amount), //staking 3.5 sei
    gasLimit: ethers.parseEther('0.00000000001')
  };
 
  console.log('Staking ', overrides);
  contract.delegate(validatorAddress, overrides).then((result) => {
    console.log('DelegateResult: ', toUtf8String(result));
  });
};
 
const testApp = async () => {
  const validatorAddress = 'seivaloperAddress';
  const rpcUrl = 'https://evm-rpc-testnet.sei-apis.com';
 
  const provider = new ethers.JsonRpcProvider(rpcUrl);
  const signer = new LedgerSigner(Transport, provider);
 
  const defaultAddress = await signer.getAddress();
 
  await stake(signer, '5', defaultAddress, validatorAddress); // stake 5 Sei
};