Substrate.NET.API provide full control on instanciating an account, sign a transaction, and then verify it If you want an easier-to-use nuget package, please use Substrate.NET.Wallet
When creating an Sr25519 account here you first need the seed The seed can be get from
| Substrate.NET.Wallet | Substrate.NET.API | |
|---|---|---|
| Uri | CreateFromUri | |
| Mnemonic phrase | CreateFromUri | GetSecretKeyFromMnemonic |
With the seed, we can now instanciate a new MiniSecret with expand mode
Then an account can be created by choosing one of this two options
| Private key | Sign | Verify |
|---|---|---|
| miniSecret.ExpandToSecret().ToEd25519Bytes() | Sr25519v091.SignEd25519() | Sr25519v091.VerifyEd25519() |
| miniSecret.ExpandToSecret().ToBytes() | Sr25519v091.SignSimple() | Sr25519v091.Verify() |
Here is a full example of this two options :
/*
* Build an account with ExpandToSecret().ToHalfEd25519Bytes() => concatenate secret with MultiplyScalarBytesByCofactor + nonce
*/
var miniSecret_Ed25519Bytes = new Schnorrkel.Keys.MiniSecret(seed, Schnorrkel.Keys.ExpandMode.Ed25519);
var account_Ed25519Bytes = Account.Build(KeyType.Sr25519, miniSecret_Ed25519Bytes.ExpandToSecret().ToEd25519Bytes(), miniSecret_Ed25519Bytes.ExpandToPublic().Key);
string message = "this is a message";
// Sign
var signature_Ed25519 = Sr25519v091.SignEd25519(account_Ed25519Bytes.Bytes, account_Ed25519Bytes.PrivateKey, message.ToBytes());
// Verify
var isVerified = Sr25519v091.VerifyEd25519(signature_Ed25519, account_Ed25519Bytes.Bytes, message.ToBytes())/*
* Build an account with ExpandToSecret().ToBytes() => concatenate secret + nonce
*/
var miniSecret_simple = new Schnorrkel.Keys.MiniSecret(seed, Schnorrkel.Keys.ExpandMode.Ed25519);
var account_simple = Account.Build(KeyType.Sr25519, miniSecret_simple.ExpandToSecret().ToBytes(), miniSecret_simple.ExpandToPublic().Key);
string message = "this is a message";
// Sign
var signature_simple_1 = Sr25519v091.SignSimple(account_simple.Bytes, account_simple.PrivateKey, message.ToBytes());
// Verify
Sr25519v091.Verify(signature_simple_1, account_simple.Bytes, message.ToBytes())