Signer class

Represents a signing source used to produce ECDSA signatures for EIP-7702 authorization messages and typed transactions.

Two variants are supported:

  • Signer.eth – wraps an EthPrivateKey from the web3dart package.
  • Signer.raw – wraps a 32-byte Uint8List raw private key.

Both variants are treated equivalently by signing utilities; callers do not need to differentiate between them.

Example:

final signer = Signer.raw(myPrivateKeyBytes);
final signature = signer.signDigest(messageHash);

See also:

  • EthPrivateKey – the key type used by web3dart.
Implementers
Available extensions
Annotations
  • @freezed

Constructors

Signer.eth(EthPrivateKey ethPrivateKey)
const
factory
Signer.raw(Uint8List rawPrivateKey)
const
factory

Properties

ethPrivateKey → EthPrivateKey

Available on Signer, provided by the SignerX extension

Returns the EthPrivateKey associated with this signer.
no setter
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

map<TResult extends Object?>({required TResult raw(RawSigner value), required TResult eth(EthSigner value)}) → TResult

Available on Signer, provided by the SignerPatterns extension

A switch-like method, using callbacks.
mapOrNull<TResult extends Object?>({TResult? raw(RawSigner value)?, TResult? eth(EthSigner value)?}) → TResult?

Available on Signer, provided by the SignerPatterns extension

A variant of map that fallback to returning null.
maybeMap<TResult extends Object?>({TResult raw(RawSigner value)?, TResult eth(EthSigner value)?, required TResult orElse()}) → TResult

Available on Signer, provided by the SignerPatterns extension

A variant of map that fallback to returning orElse.
maybeWhen<TResult extends Object?>({TResult raw(Uint8List rawPrivateKey)?, TResult eth(EthPrivateKey ethPrivateKey)?, required TResult orElse()}) → TResult

Available on Signer, provided by the SignerPatterns extension

A variant of when that fallback to an orElse callback.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
sign(Uint8List preImage) → EIP7702MsgSignature

Available on Signer, provided by the SignerX extension

Signs the given preimage using this signer’s underlying private key and returns an EIP7702MsgSignature.
signAsync(Uint8List preImage) → Future<EIP7702MsgSignature>

Available on Signer, provided by the SignerX extension

Asynchronously signs the given preimage using this signer’s underlying private key.
toString() → String
A string representation of this object.
inherited
when<TResult extends Object?>({required TResult raw(Uint8List rawPrivateKey), required TResult eth(EthPrivateKey ethPrivateKey)}) → TResult

Available on Signer, provided by the SignerPatterns extension

A switch-like method, using callbacks.
whenOrNull<TResult extends Object?>({TResult? raw(Uint8List rawPrivateKey)?, TResult? eth(EthPrivateKey ethPrivateKey)?}) → TResult?

Available on Signer, provided by the SignerPatterns extension

A variant of when that fallback to returning null

Operators

operator ==(Object other) → bool
The equality operator.
inherited