Ledger Setup (EVM)

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Prerequisites

1. Install the Ledger app Open the Manager in Ledger Live. Install either the Sei app or the Ethereum app on your Ledger device. The Ethereum app supports any EVM chain, including Sei, but the native Sei app may give the best compatibility.
2. Enable blind signing In the settings of the Ethereum or Sei app on the Ledger device, enable Blind signing. This setting lets the device sign arbitrary EVM transactions and contract calls (for example, precompile calls). Without it, the device rejects them.
3. Set up USB permissions (Linux only) Your process needs a udev rule to communicate with the Ledger over USB HID. Clone the official rules from LedgerHQ/udev-rules. Copy 49-ledger.rules into /etc/udev/rules.d/. Run sudo udevadm control --reload-rules. Then disconnect your Ledger and connect it again.
4. Install dependencies
   npm install ethers @ethers-ext/signer-ledger @ledgerhq/hw-transport-node-hid
   

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Connecting your Ledger

import { LedgerSigner } from '@ethers-ext/signer-ledger';
import TransportNodeHid from '@ledgerhq/hw-transport-node-hid';
import { ethers } from 'ethers';

const rpcUrl = 'https://evm-rpc-testnet.sei-apis.com';
const provider = new ethers.JsonRpcProvider(rpcUrl);
const signer = new LedgerSigner(TransportNodeHid, provider);

const addr = await signer.getAddress();
console.log('Using Ledger address:', addr);

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Sending a transfer

import { LedgerSigner } from '@ethers-ext/signer-ledger';
import TransportNodeHid from '@ledgerhq/hw-transport-node-hid';
import { ethers } from 'ethers';

const provider = new ethers.JsonRpcProvider('https://evm-rpc-testnet.sei-apis.com');
const signer = new LedgerSigner(TransportNodeHid, provider);

const tx = await signer.sendTransaction({
  to: '0xRECIPIENT_ADDRESS',
  value: ethers.parseEther('1.0')
});

console.log('TX sent:', tx.hash);
const receipt = await tx.wait();
console.log('Confirmed in block:', receipt.blockNumber);

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Troubleshooting

• Timeouts: If the Ledger times out, increase the HID timeouts or make sure that the device stays awake during signing.
• “Blind signing required” errors: Check that blind signing is enabled in the app settings on the device itself.
• Connection failures: Make sure that no other application, such as Ledger Live, holds the USB connection to your device.