Tutorials
Using Ledger with Ethers

Using Ledger wallet with ethers on Sei

Prerequisites:

  1. Make sure you have a Ethereum app installed on your Ledger device.
  2. Enable blind signing in the Ethereum app settings (needed for precompile examples and working with contracts in general).
  3. 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 (opens in a new tab).

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
};
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