Signer

Definition

This is a custom zig implementation of ecdsa signers with the Secp256k1 curve.

Usage

This is expecting you to pass in a private key or null if you passed in null we will generate a random Secp256k1 scalar that will be used as the private key.

getAddressFromPublicKey

Gets the ethereum address from the signers public key.

const Signer = @import("zabi").Signer
const random = try signer.init(null);
 
try random.getAddressFromPublicKey();

Returns

Type: [20]u8 -> This is not checksumed.

Sign

Signs a message using the signer. This expected that the message was previously hashed.

const Signer = @import("zabi").Signer
const random = try signer.init(null);
 
try random.sign([_]u8{0} ** 32);

Returns

Type: Signature

RecoverPublicKey

Recovers a public key from a message and signature. This expected that the message was previously hashed.

const Signer = @import("zabi").Signer
const random = try signer.init(null);
 
try random.recoverPublicKey([_]u8{0} ** 32, .{.r = [_]u8{0} ** 32, .s =[_]u8{0} ** 32, .v = 0 });

Returns

Type: [65]u8

RecoverEthereumAddress

Recovers an ethereum from a message and signature. This expected that the message was previously hashed. The address will already be checksumed.

const Signer = @import("zabi").Signer
const random = try signer.init(null);
 
try random.recoverEthereumAddress([_]u8{0} ** 32, .{.r = [_]u8{0} ** 32, .s =[_]u8{0} ** 32, .v = 0 });

Returns

Type: [40]u8

RecoverMessageAddress

Exactly the same as above but the message will be hashed. The address will already be checksumed.

const Signer = @import("zabi").Signer
const random = try signer.init(null);
 
try random.recoverMessageAddress([_]u8{0} ** 32, .{.r = [_]u8{0} ** 32, .s =[_]u8{0} ** 32, .v = 0 });

Returns

Type: [40]u8

SignMessage

Signs an ethereum message. Follows the specification so it prepends \x19Ethereum Signed Message:\n to the start of the message.

const Signer = @import("zabi").Signer
const random = try signer.init(null);
 
try random.signMessage(testing.allocator, [_]u8{0} ** 32);

Returns

Type: Signature

VerifyMessage

Verifies if a given message was sent by the current signer.

const Signer = @import("zabi").Signer
const random = try signer.init(null);
 
try random.verifyMessage(testing.allocator, .{.r = [_]u8{0} ** 32, .s =[_]u8{0} ** 32, .v = 0 }, [_]u8{0} ** 32);

Returns

Type: bool