web5 load external private key

minimalexternalkey.js

const passphrase = "passphrase typed in from user interface"
const private_key_restored_from_db =  "uint8array_base64_encoded_on_db"
const public_key_restored_from_db =  "uint8array_base64_encoded_on_db_pub"


let appData = new AppDataVault({
  store: new LevelStore('DATA/AGENT/APPDATA')
});
const options={
    algorithm   : { name: 'EdDSA', namedCurve: 'Ed25519' },
    extractable : true,
    keyUsages   : ['sign', 'verify']
  };
const { algorithm, extractable, keyUsages } = options;
cryptoKeyPair = {
  privateKey : new CryptoKey(algorithm, extractable, private_key_restored_from_db, 'private', keyUsages), 
  publicKey  : new CryptoKey(algorithm, true, public_key_restored_from_db, 'public', keyUsages)
};
await appData.initialize({
  passphrase : passphrase,
  keyPair    : cryptoKeyPair,
});
const { web5, did: aliceDid } = await Web5.connect({appData:appData});