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use amplify::Wrapper;
use bitcoin::hashes::{sha256, Hmac};
use bitcoin::{secp256k1, TxOut};
use client_side_validation::commit_verify::EmbedCommitVerify;
use wallet::PubkeyScript;
use super::{
Container, Error, Proof, ScriptEncodeData, ScriptEncodeMethod,
SpkCommitment, SpkContainer,
};
#[derive(Clone, PartialEq, Eq, Debug, Display)]
#[display(Debug)]
pub struct TxoutContainer {
pub value: u64,
pub script_container: SpkContainer,
pub tweaking_factor: Option<Hmac<sha256::Hash>>,
}
impl TxoutContainer {
pub fn construct(
protocol_tag: &sha256::Hash,
value: u64,
pubkey: secp256k1::PublicKey,
source: ScriptEncodeData,
method: ScriptEncodeMethod,
) -> Self {
Self {
value,
script_container: SpkContainer::construct(
protocol_tag,
pubkey,
source,
method,
),
tweaking_factor: None,
}
}
}
impl Container for TxoutContainer {
type Supplement = sha256::Hash;
type Host = TxOut;
fn reconstruct(
proof: &Proof,
supplement: &Self::Supplement,
host: &Self::Host,
) -> Result<Self, Error> {
Ok(Self {
value: host.value,
script_container: SpkContainer::reconstruct(
proof,
supplement,
&PubkeyScript::from_inner(host.clone().script_pubkey),
)?,
tweaking_factor: None,
})
}
fn deconstruct(self) -> (Proof, Self::Supplement) {
self.script_container.deconstruct()
}
fn to_proof(&self) -> Proof {
self.script_container.to_proof()
}
fn into_proof(self) -> Proof {
self.script_container.into_proof()
}
}
#[derive(
Wrapper, Clone, PartialEq, Eq, Hash, Default, Debug, Display, From,
)]
#[display(Debug)]
pub struct TxoutCommitment(TxOut);
impl<MSG> EmbedCommitVerify<MSG> for TxoutCommitment
where
MSG: AsRef<[u8]>,
{
type Container = TxoutContainer;
type Error = Error;
fn embed_commit(
container: &mut Self::Container,
msg: &MSG,
) -> Result<Self, Self::Error> {
let commitment = TxOut {
value: container.value,
script_pubkey: (**SpkCommitment::embed_commit(
&mut container.script_container,
msg,
)?)
.clone(),
};
container.tweaking_factor = container.script_container.tweaking_factor;
Ok(commitment.into())
}
}