Keypair

Creating keypair

You can create a keypair in multiple ways, using BIP39 mnemonic, URI, seed, in the following examples we will create a keypair for Alice using each of these methods.

From mnemonic

final keyring = Keyring();
final mnemonic = 'bottom drive obey lake curtain smoke basket hold race lonely fit walk//Alice';
final keypair = await keyring.fromMnemonic(mnemonic);
print('Alice address: ${keypair.address}');

From URI

final keyring = Keyring();
final keypair = await keyring.fromUri('//Alice');
print('Alice address: ${keyPair.address}');

From Seed

final keyring = Keyring();
final keypair = await keyring.fromSeed(decodeHex('0xe5be9a5092b81bca64be81d212e7f2f9eba183bb7a90954f7b76361f6edb5c0a'));
print('Alice address: ${keypair.address}');

Manage keypair

The keyring provides a way to manage keypairs, you can add, retrieve, and remove keypairs.

Add keypair

final keyring = Keyring();
final keyPair1 = KeyPair.sr25519.fromSeed(
    Uint8List.fromList('12345678901234567890123456789012'.codeUnits));
final keyPair2 = KeyPair.sr25519.fromSeed(Uint8List.fromList(hex.decode(
    '9d61b19deffd5a60ba844af492ec2cc44449c5697b326919703bac031cae7f60'));

// Add keyPair1 to keyring
keyring.add(keyPair1);

final address1 = keyPair1.address;
final address2 = keyPair2.address;

// Add keyPair2 to keyring
keyring.add(keyPair2);

final addresses = keyring.addresses;

Retrieve keypair

final keyring = Keyring();
final keyPair1 = KeyPair.sr25519.fromSeed(
    Uint8List.fromList('12345678901234567890123456789012'.codeUnits));

final publicKey1 = keyPair1.publicKey.bytes;

// Add keyPair1 to key
keyring.add(keyPair1);

final keyPair = keyring.getByPublicKey(publicKey1);

final nonExistentKeyPair = keyring.getByPublicKey([1, 2, 3]);

Remove keypair

final keyring = Keyring();
final keyPair1 = KeyPair.sr25519.fromSeed(
    Uint8List.fromList('12345678901234567890123456789012'.codeUnits));

// Add keyPair1 and keyPair2 to keyring
keyring.add(keyPair1);
keyring.add(keyPair2);

final address1 = keyPair1.address;
keyring.remove(address1);

final nonExistentKeyPair = keyring.getByAddress(address1);