Function decode

scripts/utils.ts:15–32

(rawKey: string)

 * Forum: https://forum.dfinity.org/t/using-dfinity-agent-in-node-js/6169/60?u=peterparker
 */
const decode = (rawKey: string) => {
  const buf = pemfile.decode(rawKey)

  if (rawKey.includes("EC PRIVATE KEY")) {
    if (buf.length !== 118) {
      throw Error("expecting byte length 118 but got " + buf.length)
    }

    return Secp256k1KeyIdentity.fromSecretKey(buf.slice(7, 39))
  }

  if (buf.length !== 85) {
    throw Error("expecting byte length 85 but got " + buf.length)
  }

  const secretKey = Buffer.concat([buf.slice(16, 48)])
  return Ed25519KeyIdentity.fromSecretKey(secretKey)
}

export const initIdentity = (mainnet: boolean) => {
  const userHomeDir = os.homedir()