Load a local json file keypair

When running your local project may sometimes want to use local keypair. The default keypair path generated by the Solana CLI is ~/.config/solana/id.json.

You can generate a custom keypair using the Solana CLI command solana-keygen grind --starts-with hi:1. This will generate a keypair with a public key starting with "hi" and output the keypair to a json file. You can then load this keypair using the helper function below.

import { loadKeypairSignerFromFile } from "gill/node";

// defaults to using the Solana CLI keypair path: ~/.config/solana/id.json
const signer = await loadKeypairSignerFromFile();

// load a keypair from a specific file path
const signer2 = await loadKeypairSignerFromFile("/path/to/keypair.json");