Struct Transaction 

pub struct Transaction {
    pub version: u32,
    pub lock_time: LockTime,
    pub input: Vec<TxIn>,
    pub output: Vec<TxOut>,
}

Elements transaction

Fields

version: u32

Transaction version field (should always be 2)

lock_time: LockTime

Transaction locktime

input: Vec<TxIn>

Vector of inputs

output: Vec<TxOut>

Vector of outputs

Implementations

impl Transaction

pub fn verify_tx_amt_proofs( &self, secp: &Secp256k1<All>, spent_utxos: &[TxOut], ) -> Result<(), VerificationError>

Verify that the transaction has correctly calculated blinding factors and they CT verification equation holds. This is NOT a complete Transaction verification check It does NOT check whether input witness/script satisfies the script pubkey, or inputs are double-spent and other consensus checks. This method only checks if the Transaction verification equation for Confidential transactions holds. i.e Sum of inputs = Sum of outputs + fees. And the corresponding surjection/rangeproofs are correct. For checking of surjection proofs and amounts, spent_utxos parameter should contain information about the prevouts. Note that the order of spent_utxos should be consistent with transaction inputs.

Examples

let secp = secp256k1_zkp::Secp256k1::new();
let tx: Transaction = deserialize(&Vec::<u8>::from_hex(
    "0200000001014166d8bc73e9f6bf833f6372b021d6e412ae773cdd722467db163ff06d1e1fcb0100000000fdffffff030bbc8258e21ddcfa93f8b13e26675ce0696bab13e48b6e570087d27b8c2e58229108a6dd1a702dc30f897e040004def8dd2e67b7c6567a77b7c4d88e71d837531d76021d91021fab6f42fbae69c1ef0fe51ed088f08f69f9e658c5f702ab8a512334cb160014bea76c13404321e84760d712218e455b559f2ea20b637f6c0c63b8403cb889ee0502f2b4d8f391b8230798e938ea0aff882758f5fc09674f64e8313722b6fda15d4e3be5845a2c8fd7a243312413f026f6dc9541bb6e031465dee3abbf0059ebabf7933cd5bc8725a8e284f9f2868df84dcd78af6e15741600149928d95e500cf680ab923370529b5110b4c6b35501230f4f5d4b7c6fa845806ee4f67713459e1b69e8e60fcee2e4940c7a0d5de1b20100000000000000f900006f000000000002473044022018a96048b7b3d732fe44421655a26c076a84adc9b0d210856734ef52093b0ba8022045f3645b9d9f40a47963f56c5fe599a23079bd14fceaa2432750a235c623485e01210232edc2082acf05281c9ddb1d8e024de805ae65f6547848ea34441c09173bee3000430100012bfbd82937b25fc506c0b016d904d63eb15301c8fabc6e796549f0383cc08c7effd3d398b04e4feb1279f90f7c32d9a87907155514d69f9612b059f6fdf2a62ffd4e10603300000000000000013f2817003c824b0c690dbde0739e2e1263411a92287701d3bcb9917b2562397755e3945a5f0e917e4eb71b9245d225abcb97a43c7c8bae23fe9b389991db5e693937b2dc225072e5177673ba18545a9dcafd1f550501543ca45d11eaabd2769e49bc5a26fbe64eedaf38d56ef5f6d5cbac587c97c9846a6472a0525104dbabf24d34fb3db29244ef5dce6c9b71a12d9bd48bb796f6b4f89c1130e767ea70842402a1d1c1e4fa2ab18db1f407587e2b5ecbfc34c05b5fe5d10ab43fc9fda482ae7b08eb0115e9758b9d14de8f8d567133779a6153411e32456241f149e0731dbc263a5831317bb394a0efbed52cbf121abafce5dcde0949b619dffea3a942e0ce237a4725a865f4d3a7dd18f6c3baceefd2504fe03d898687ed44237e6105a237621a71f68a22d43ade7c59e14ebc5ea93e236f29b7d8cdaf933c8dc2df72dfd4b74c4469ce34a263373c7154ee89a66387bda99794ecfda0ac03298f1be66f60a67202053fcc98eea44839f8f6e5e0aa3657b72bd54a236362222ab91b5bc0abc7bf1b19138dbead02f904e0417b45699fa3699f7c8af319db491b7c0990a119ae0fbb0591e5c1185c50aa6b8a6ee85cbb841bc4fb99164e0b4d0e18fd8f61d41e05af83c4e94091256f27fe2838d8b44c657f0035c11c3c7636f62e0e3b2188faed87daa23b01f690a0712a06f06f464be8b5ae955f3f880f750d01d23c3f6ee7472b1a8508b0b7a200675dd347c14d520e77f7d61dc28e87f63129aeeb15c32fce6fc109ea7582bedef9594685b8290ead0fec8f7a0477babf661c61d7e651b19b46a59b06d92472ff1e30033534acfdc6a23bdd287e0582d3ca45be95436120ebae081c0c81da96d60db6870d02e386e5cf0ceeb0d5d746ab7178f9297c47be7d9fae7b73eda435319ed7865fd3357120645cc46bbb8ab4ff58fbffc3252888ac7e1bf6f61ef113c1823e38494c2344897f31f65374b13b677656b37386d95a66089b2d1c557b6f70d0354fb71a903c530ead4a0199d71052f589be243ccbc890537b9412f2d70a4d9585c8af6af9844f403acc40ff8633bd2232c032fff6538aa45218ecac24eb62a48f852b91dab12efea26f2b96f368fd850da25ba319d09289df0ee8052ebc0e39bb006966cc51757a3bc3da2a7483ccc7b82f4b13fdc5222a72f60bb750ffb469fa1821cff233ce8078676a9c8dc4cbdd89337275af2e51fe5351d7ed81ef62dcd944022da3ae3cc501e777d567217b21e13d8f1cc2cfac2d8494343e3b6ae80cff461ea20a3604bd41b42d2ead953bdbd75170c7129139724a6669ae77ac234370625a9533168bc1cad48839ef2abe517d2955d75b5d573e6b6e52e5342d9b6d9e2ed5413bd2cb8190fbbfa22a090da3eb462a886e2c2fbc076fc47c8778d3d10b15b7afdc2fd8886b4f85a565c2f517005b125df57a444a4d2528b7d3ac67a56454fdb2fc764f29d6e9fa8ec0bfb78f562ed9331d24f541c03a51628a932457e0287189ea36a35be4d01577e7a2a766f2081366840780abfd2aff20a9d4cc826fd751fbb0e7b353d518a3cd90bd61e694a7645a7859e21532d8f9759d32804c3341e41164f8815a38411484f4b394db6a8150591faa9d37cc76e812fc2b6cfb1e605d91552a31fe88b9d18cbbc7d2e558db74987564209ce126241c38a80da1df34db585a9d7a1330080cb16fdaf9ec1c37f309a8a0e2e7748ede59e7910b8b6b5caee51532ee6c5bd851db455c150b8d90445a36fbac9858798d73abf605dd0f515c23a0f975d50d09e6d7f541f0250c23c414219c87b15929ada1974a71709809db49ad8cab72958c31b1ddd0064d264641327a433d748713c57bc0063ec45b852a9beb2cc2be7465bd48b3d113ecf3d4981f2e3ddc7494714d21b860eb336ab91e894af0a5ff727f2b8d85c12f7ed321c90038e8f26f544c4918562b7c65e7cc1cecd5c6961ea2d1f806268d1dca92337f127a03c2626fcac5b8caf0a7abc3a6cc4d362f040572b56c5ad09e0dfd92235dbb2c1a8fbccdee13b2cf55681ec8f053575214c9200bee18428b25440b220079ca8708d23c84927103a8afac4bee58b95cce012ea23b175bd2a12636afc07e649675568ef945d352402f222fa62dcbad7f9f0dae132c089aea82d4c8b905655943e8b61f55475b3c3755d5967b01236e2c4b833ff6945031b50f0a68f0ec7130055761f8e9c2ebb2c9462d0b8aa9e99c7ebed1d3213abc471bbd49f44e78e057c750590f3ac02d3baa776d9f9ef39bc1a166dd7cb1cc3e63d94d7bb51544b9b02ad1278f7691973030612534ff513d2cf7988b3235b4449976b90fa5932639bafb7d0d33b58a167617ab4a46189e251bd488cc36a4b40968aa34c20a80f3ee5380152b7dd62de83c1e2a07307861b3713506115c1021880c19f89f45e40a16cebfc1980ebbab7bb9288eb33d4696c39bedada35a41f9e6832a0f5e12f2968303533c8186cc09da7c3ce4e96410f7a9bc5941706fd513a908ace16cd3605c5d0f4b872e931d79361134371285b6d223e1601ad129daa776ab58cb4dc7eaddd45cbf722d4cc4229d75a52e18c7470ed1a7a84671bd8bca4b9bdb0d7b0a34779d1a538fad3b6e2d7cc2972ab1bb98613b8ecc27f9fc25fd797aca4e5d0de4aa6df7f6607ad268baea41f3c1f9afc9dc5da929b29e4ac203a7476fe2c185ac25b835b6f2037c3f540852bfd2d643c179e0951cebc35743f6315a56d2965de934695ef5dbae70924f8548a858518340d7add64f45d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).unwrap()).unwrap();
let conf_asset : confidential::Asset = deserialize(&Vec::<u8>::from_hex("0b37d4818b8ce1df5d3d0b88d140c6848029d6d85fb0f6ee270865caf53d0b82d4").unwrap()).unwrap();
let conf_value : confidential::Value = deserialize(&Vec::<u8>::from_hex("094e2cceeb8005ac14b611821c37fca757b47426afb0bb4eabe41c275d3997c046").unwrap()).unwrap();
let spk : script::Script = deserialize(&Vec::<u8>::from_hex("16001475f578ed4f7a0103182a6e92942c66350dd949dc").unwrap()).unwrap();

let txout = TxOut {
    asset: conf_asset,
    value: conf_value,
    nonce: confidential::Nonce::Null, // unimportant in verification
    script_pubkey: spk,
    witness: TxOutWitness:: default(),
    // We don't care about witness here since all the blinding
    // factors/explicit values are already known.
};
/// Verify a confidential commitment with amounts. 1 CT input and 3 outputs
/// 1 fee output and 2 CT outputs.
tx.verify_tx_amt_proofs(&secp, &[txout]).expect("Verification");

pub fn blind<R, C>( &mut self, rng: &mut R, secp: &Secp256k1<C>, spent_utxo_secrets: &[TxOutSecrets], blind_issuances: bool, ) -> Result<BTreeMap<CtLocation, (AssetBlindingFactor, ValueBlindingFactor, SecretKey)>, BlindError>

where R: RngCore + CryptoRng, C: Signing,

Blind a transaction Blind all outputs but the fee outputs As per the elements convention, In order to blind transaction, the user should set the blinding key as the nonce field in the transaction. If the nonce of the output is Null, it is not blinded For a successful blind, atleast two outputs must be blinded.

impl Transaction

pub fn is_coinbase(&self) -> bool

Whether the transaction is a coinbase tx

pub fn has_witness(&self) -> bool

Determines whether a transaction has any non-null witnesses

pub fn get_weight(&self) -> usize

👎Deprecated since 0.19.1: Please use Transaction::weight instead.

Get the “weight” of this transaction; roughly equivalent to BIP141, in that witness data is counted as 1 while non-witness data is counted as 4.

pub fn weight(&self) -> usize

Get the “weight” of this transaction; roughly equivalent to BIP141, in that witness data is counted as 1 while non-witness data is counted as 4.

pub fn get_size(&self) -> usize

👎Deprecated since 0.19.1: Please use Transaction::size instead.

Gets the regular byte-wise consensus-serialized size of this transaction.

pub fn size(&self) -> usize

Gets the regular byte-wise consensus-serialized size of this transaction.

pub fn vsize(&self) -> usize

Returns the “virtual size” (vsize) of this transaction.

Will be ceil(weight / 4.0).

pub fn discount_weight(&self) -> usize

Get the “discount weight” of this transaction; this is the weight minus the output witnesses and minus the differences between asset and nonce commitments from their explicit values (weighted as part of the base transaction).

pub fn discount_vsize(&self) -> usize

Returns the “discount virtual size” (discountvsize) of this transaction.

Will be ceil(discount weight / 4.0).

pub fn txid(&self) -> Txid

The txid of the transaction.

pub fn wtxid(&self) -> Wtxid

Get the witness txid of the transaction.

pub fn fee_in(&self, asset: AssetId) -> u64

Get the total transaction fee in the given asset.

pub fn all_fees(&self) -> HashMap<AssetId, u64>

Get all fees in all assets.

Trait Implementations

impl Clone for Transaction

fn clone(&self) -> Transaction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Transaction

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

Formats the value using the given formatter.

impl Decodable for Transaction

fn consensus_decode<D: Read>(d: D) -> Result<Transaction, Error>

Decode an object with a well-defined format

impl Deserialize for Transaction

fn deserialize(bytes: &[u8]) -> Result<Self, Error>

Deserialize a value from raw data.

impl Encodable for Transaction

fn consensus_encode<S: Write>(&self, s: S) -> Result<usize, Error>

Encode an object with a well-defined format, should only ever error if the underlying Write errors. Returns the number of bytes written on success

impl Hash for Transaction

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 Transaction

fn cmp(&self, other: &Self) -> 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,

Restrict a value to a certain interval.

impl PartialEq for Transaction

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Transaction

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Serialize for Transaction

fn serialize(&self) -> Vec<u8>

Serialize a value as raw data.

impl Eq for Transaction

impl StructuralPartialEq for Transaction