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rustfmt: Run on util/transaction_utils.rs

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Elias Rohrer 2024-09-18 09:41:22 +02:00
parent 2be14b3ef5
commit b9fc8ba9aa
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1 changed files with 40 additions and 41 deletions
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81
lightning/src/util/transaction_utils.rs
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@ -8,10 +8,10 @@
// licenses.
use bitcoin::amount::Amount;
use bitcoin::transaction::{Transaction, TxOut};
use bitcoin::script::ScriptBuf;
use bitcoin::consensus::Encodable;
use bitcoin::consensus::encode::VarInt;
use bitcoin::consensus::Encodable;
use bitcoin::script::ScriptBuf;
use bitcoin::transaction::{Transaction, TxOut};
#[allow(unused_imports)]
use crate::prelude::*;
@ -19,12 +19,10 @@ use crate::prelude::*;
use crate::io_extras::sink;
use core::cmp::Ordering;
pub fn sort_outputs<T, C : Fn(&T, &T) -> Ordering>(outputs: &mut Vec<(TxOut, T)>, tie_breaker: C) {
pub fn sort_outputs<T, C: Fn(&T, &T) -> Ordering>(outputs: &mut Vec<(TxOut, T)>, tie_breaker: C) {
outputs.sort_unstable_by(|a, b| {
a.0.value.cmp(&b.0.value).then_with(|| {
a.0.script_pubkey[..].cmp(&b.0.script_pubkey[..]).then_with(|| {
tie_breaker(&a.1, &b.1)
})
a.0.script_pubkey[..].cmp(&b.0.script_pubkey[..]).then_with(|| tie_breaker(&a.1, &b.1))
})
});
}
@ -34,22 +32,26 @@ pub fn sort_outputs<T, C : Fn(&T, &T) -> Ordering>(outputs: &mut Vec<(TxOut, T)>
/// Assumes at least one input will have a witness (ie spends a segwit output).
/// Returns an Err(()) if the requested feerate cannot be met.
/// Returns the expected maximum weight of the fully signed transaction on success.
pub(crate) fn maybe_add_change_output(tx: &mut Transaction, input_value: Amount, witness_max_weight: u64, feerate_sat_per_1000_weight: u32, change_destination_script: ScriptBuf) -> Result<u64, ()> {
if input_value > Amount::MAX_MONEY { return Err(()); }
pub(crate) fn maybe_add_change_output(
tx: &mut Transaction, input_value: Amount, witness_max_weight: u64,
feerate_sat_per_1000_weight: u32, change_destination_script: ScriptBuf,
) -> Result<u64, ()> {
if input_value > Amount::MAX_MONEY {
return Err(());
}
const WITNESS_FLAG_BYTES: u64 = 2;
let mut output_value = Amount::ZERO;
for output in tx.output.iter() {
output_value += output.value;
if output_value >= input_value { return Err(()); }
if output_value >= input_value {
return Err(());
}
}
let dust_value = change_destination_script.minimal_non_dust();
let mut change_output = TxOut {
script_pubkey: change_destination_script,
value: Amount::ZERO,
};
let mut change_output = TxOut { script_pubkey: change_destination_script, value: Amount::ZERO };
let change_len = change_output.consensus_encode(&mut sink()).unwrap();
let starting_weight = tx.weight().to_wu() + WITNESS_FLAG_BYTES + witness_max_weight as u64;
let starting_fees = (starting_weight as i64) * feerate_sat_per_1000_weight as i64 / 1000;
@ -76,12 +78,12 @@ mod tests {
use super::*;
use bitcoin::amount::Amount;
use bitcoin::locktime::absolute::LockTime;
use bitcoin::transaction::{TxIn, OutPoint, Version};
use bitcoin::script::Builder;
use bitcoin::hash_types::Txid;
use bitcoin::hashes::Hash;
use bitcoin::hex::FromHex;
use bitcoin::locktime::absolute::LockTime;
use bitcoin::script::Builder;
use bitcoin::transaction::{OutPoint, TxIn, Version};
use bitcoin::{PubkeyHash, Sequence, Witness};
use alloc::vec;
@ -89,47 +91,45 @@ mod tests {
#[test]
fn sort_output_by_value() {
let txout1 = TxOut {
value: Amount::from_sat(100),
script_pubkey: Builder::new().push_int(0).into_script()
value: Amount::from_sat(100),
script_pubkey: Builder::new().push_int(0).into_script(),
};
let txout1_ = txout1.clone();
let txout2 = TxOut {
value: Amount::from_sat(99),
script_pubkey: Builder::new().push_int(0).into_script()
script_pubkey: Builder::new().push_int(0).into_script(),
};
let txout2_ = txout2.clone();
let mut outputs = vec![(txout1, "ignore"), (txout2, "ignore")];
sort_outputs(&mut outputs, |_, _| { unreachable!(); });
sort_outputs(&mut outputs, |_, _| {
unreachable!();
});
assert_eq!(
&outputs,
&vec![(txout2_, "ignore"), (txout1_, "ignore")]
);
assert_eq!(&outputs, &vec![(txout2_, "ignore"), (txout1_, "ignore")]);
}
#[test]
fn sort_output_by_script_pubkey() {
let txout1 = TxOut {
value: Amount::from_sat(100),
value: Amount::from_sat(100),
script_pubkey: Builder::new().push_int(3).into_script(),
};
let txout1_ = txout1.clone();
let txout2 = TxOut {
value: Amount::from_sat(100),
script_pubkey: Builder::new().push_int(1).push_int(2).into_script()
script_pubkey: Builder::new().push_int(1).push_int(2).into_script(),
};
let txout2_ = txout2.clone();
let mut outputs = vec![(txout1, "ignore"), (txout2, "ignore")];
sort_outputs(&mut outputs, |_, _| { unreachable!(); });
sort_outputs(&mut outputs, |_, _| {
unreachable!();
});
assert_eq!(
&outputs,
&vec![(txout2_, "ignore"), (txout1_, "ignore")]
);
assert_eq!(&outputs, &vec![(txout2_, "ignore"), (txout1_, "ignore")]);
}
#[test]
@ -148,7 +148,9 @@ mod tests {
let txout2_ = txout2.clone();
let mut outputs = vec![(txout1, "ignore"), (txout2, "ignore")];
sort_outputs(&mut outputs, |_, _| { unreachable!(); });
sort_outputs(&mut outputs, |_, _| {
unreachable!();
});
assert_eq!(&outputs, &vec![(txout1_, "ignore"), (txout2_, "ignore")]);
}
@ -156,8 +158,8 @@ mod tests {
#[test]
fn sort_output_tie_breaker_test() {
let txout1 = TxOut {
value: Amount::from_sat(100),
script_pubkey: Builder::new().push_int(1).push_int(2).into_script()
value: Amount::from_sat(100),
script_pubkey: Builder::new().push_int(1).push_int(2).into_script(),
};
let txout1_ = txout1.clone();
@ -165,12 +167,9 @@ mod tests {
let txout2_ = txout1.clone();
let mut outputs = vec![(txout1, 420), (txout2, 69)];
sort_outputs(&mut outputs, |a, b| { a.cmp(b) });
sort_outputs(&mut outputs, |a, b| a.cmp(b));
assert_eq!(
&outputs,
&vec![(txout2_, 69), (txout1_, 420)]
);
assert_eq!(&outputs, &vec![(txout2_, 69), (txout1_, 420)]);
}
fn script_from_hex(hex_str: &str) -> ScriptBuf {
@ -276,7 +275,7 @@ mod tests {
assert_eq!(tx.output[0].value.to_sat(), 546);
assert_eq!(tx.output[0].script_pubkey, output_spk);
// New weight is exactly the fee we wanted.
assert_eq!(tx.weight().to_wu() / 4, 590-546);
assert_eq!(tx.weight().to_wu() / 4, 590 - 546);
tx.output.pop();
// The only change is the addition of one output.