Struct grin_core::core::transaction::TxKernel

pub struct TxKernel {
    pub features: KernelFeatures,
    pub excess: Commitment,
    pub excess_sig: Signature,
}

A proof that a transaction sums to zero. Includes both the transaction’s Pedersen commitment and the signature, that guarantees that the commitments amount to zero. The signature signs the fee_fields and the lock_height, which are retained for signature validation.

Fields

features: KernelFeatures

Options for a kernel’s structure or use

excess: Commitment

Remainder of the sum of all transaction commitments. If the transaction is well formed, amounts components should sum to zero and the excess is hence a valid public key (sum of the commitment public keys).

excess_sig: Signature

The signature proving the excess is a valid public key, which signs the transaction fee_fields.

Implementations

impl TxKernel

pub fn is_coinbase(&self) -> bool

Is this a coinbase kernel?

pub fn is_plain(&self) -> bool

Is this a plain kernel?

pub fn is_height_locked(&self) -> bool

Is this a height locked kernel?

pub fn is_nrd(&self) -> bool

Is this an NRD kernel?

pub fn excess(&self) -> Commitment

Return the excess commitment for this tx_kernel.

pub fn msg_to_sign(&self) -> Result<Message, Error>

The msg signed as part of the tx kernel. Based on kernel features and associated fields (fee_fields and lock_height).

pub fn verify(&self) -> Result<(), Error>

Verify the transaction proof validity. Entails handling the commitment as a public key and checking the signature verifies with the fee_fields as message.

pub fn batch_sig_verify(tx_kernels: &[TxKernel]) -> Result<(), Error>

Batch signature verification.

pub fn empty() -> TxKernel

Build an empty tx kernel with zero values.

pub fn with_features(features: KernelFeatures) -> TxKernel

Build an empty tx kernel with the provided kernel features.

Trait Implementations

impl Clone for TxKernel

fn clone(&self) -> TxKernel

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TxKernel

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TxKernel

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for TxKernel

We want to be able to put kernels in a hashset in the pool. So we need to be able to hash them.

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for TxKernel

fn cmp(&self, other: &TxKernel) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PMMRable for TxKernel

We store kernels in the kernel MMR. Note: These are “variable size” to support different kernel feature variants.

type E = TxKernel

The type of element actually stored in the MMR data file. This allows us to store Hash elements in the header MMR for variable size BlockHeaders.

fn as_elmt(&self) -> Self::E

Convert the pmmrable into the element to be stored in the MMR data file.

fn elmt_size() -> Option<u16>

Size of each element if “fixed” size. Elements are “variable” size if None.

impl PartialEq for TxKernel

fn eq(&self, other: &TxKernel) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for TxKernel

fn partial_cmp(&self, other: &TxKernel) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Readable for TxKernel

fn read<R: Reader>(reader: &mut R) -> Result<TxKernel, Error>

Reads the data necessary to this Readable from the provided reader

impl Serialize for TxKernel

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Writeable for TxKernel

fn write<W: Writer>(&self, writer: &mut W) -> Result<(), Error>

Write the data held by this Writeable to the provided writer

impl Copy for TxKernel

impl DefaultHashable for TxKernel

impl Eq for TxKernel