TaprootScriptInput class

A TaprootInput which spends using the script-path for 0xc0 version Tapscripts. There is no signing logic and sign() is not implemented. Subclasses should handle signing. createScriptSignature can be used to create signatures as necessary. Insertion of signatures and other data can be done manually via updateStack. These signatures must be handled by the consumer and will not be filtered upon a transaction update.

Inheritance

• Object
• Input
• RawInput
• WitnessInput
• TaprootInput
• TaprootScriptInput

Constructors

TaprootScriptInput.new({required OutPoint prevOut, required Uint8List controlBlock, required Script tapscript, List<Uint8List>? stack, int sequence = Input.sequenceFinal})

TaprootScriptInput.fromTaprootLeaf({required OutPoint prevOut, required Taproot taproot, required TapLeaf leaf, List<Uint8List>? stack, int sequence = Input.sequenceFinal})

Properties

complete → bool

Always true as a simple RawInput is assumed to be fully signed as there is no way to determine if it is or not.

no setter, inherited

controlBlock → Uint8List

no setter

hashCode → int

The hash code for this object.

no setter, inherited

prevOut → OutPoint

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

script → Script?

The script from the scriptSig bytes or null if the bytes do not represent a valid script.

no setter, inherited

scriptSig → Uint8List

final, inherited

sequence → int

final, inherited

signedSize → int?

The maximum total size when fully signed via the default hash type including any witness data of the input. If this is unknown, this is null. The actual signed size may be lower according to the data being encoded.

no setter, inherited

size → int

Obtains the cached size of the object

no setter, inherited

tapscript → Script

The tapscript embedded in the witness data, not to be confused with the empty script.

final

witness → List<Uint8List>

final, inherited

Methods

createInputSignature({required Transaction tx, required int inputN, required ECPrivateKey key, required List<Output> prevOuts, SigHashType hashType = const SigHashType.all(), Uint8List? leafHash, int codeSeperatorPos = 0xFFFFFFFF}) → SchnorrInputSignature

Creates a signature for the input. Used by subclasses to implement signing.

inherited

createScriptSignature({required Transaction tx, required int inputN, required ECPrivateKey key, required List<Output> prevOuts, SigHashType hashType = const SigHashType.all(), int codeSeperatorPos = 0xFFFFFFFF}) → SchnorrInputSignature

Creates a SchnorrInputSignature to be used for the input's script data. Provides the leaf hash to an underlying call to createInputSignature.

filterSignatures(bool predicate(InputSignature insig)) → Input

Removes signatures that the predicate returns false for. This is used to remove invalidated signatures.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

sign({required Transaction tx, required int inputN, required ECPrivateKey key, required List<Output> prevOuts, SigHashType hashType = const SigHashType.all()}) → TaprootInput

Signs the input given the tx, input number (inputN), private key and prevOuts using the specifified hashType. Should throw CannotSignInput if the key cannot sign the input. Implemented by specific subclasses.

inherited

toBytes() → Uint8List

Obtains a cached Uint8List with data serialized for this object

inherited

toHex() → String

inherited

toString() → String

A string representation of this object.

inherited

updateStack(List<Uint8List> newStack) → TaprootScriptInput

Replaces the stack to update the data required to spend the input

write(Writer writer) → void

Override to write data into writer

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

match(RawInput raw, List<Uint8List> witness) → TaprootScriptInput?

Checks if the raw input and witness data match the expected format for a TaprootScriptInput with the control block and script. If it matches this returns a TaprootScriptInput for the input or else it returns null. The script must be valid with minimal push data. The control block must be the correct size and contain the correct 0xc0 tapscript version but the internal key and parity bit is not validated.

override