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use std::convert::AsRef;
use std::ops::Sub;
use bitcoin::blockdata::transaction::{OutPoint, Transaction, TxOut};
use bitcoin::{hash_types::Txid, util::psbt};
use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum KeychainKind {
External = 0,
Internal = 1,
}
impl KeychainKind {
pub fn as_byte(&self) -> u8 {
match self {
KeychainKind::External => b'e',
KeychainKind::Internal => b'i',
}
}
}
impl AsRef<[u8]> for KeychainKind {
fn as_ref(&self) -> &[u8] {
match self {
KeychainKind::External => b"e",
KeychainKind::Internal => b"i",
}
}
}
#[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
pub struct FeeRate(f32);
impl FeeRate {
pub fn from_btc_per_kvb(btc_per_kvb: f32) -> Self {
FeeRate(btc_per_kvb * 1e5)
}
pub const fn from_sat_per_vb(sat_per_vb: f32) -> Self {
FeeRate(sat_per_vb)
}
pub const fn default_min_relay_fee() -> Self {
FeeRate(1.0)
}
pub fn from_wu(fee: u64, wu: usize) -> FeeRate {
Self::from_vb(fee, wu.vbytes())
}
pub fn from_vb(fee: u64, vbytes: usize) -> FeeRate {
let rate = fee as f32 / vbytes as f32;
Self::from_sat_per_vb(rate)
}
pub fn as_sat_vb(&self) -> f32 {
self.0
}
pub fn fee_wu(&self, wu: usize) -> u64 {
self.fee_vb(wu.vbytes())
}
pub fn fee_vb(&self, vbytes: usize) -> u64 {
(self.as_sat_vb() * vbytes as f32).ceil() as u64
}
}
impl std::default::Default for FeeRate {
fn default() -> Self {
FeeRate::default_min_relay_fee()
}
}
impl Sub for FeeRate {
type Output = Self;
fn sub(self, other: FeeRate) -> Self::Output {
FeeRate(self.0 - other.0)
}
}
pub trait Vbytes {
fn vbytes(self) -> usize;
}
impl Vbytes for usize {
fn vbytes(self) -> usize {
(self as f32 / 4.0).ceil() as usize
}
}
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Hash)]
pub struct LocalUtxo {
pub outpoint: OutPoint,
pub txout: TxOut,
pub keychain: KeychainKind,
}
#[derive(Debug, Clone, PartialEq)]
pub struct WeightedUtxo {
pub satisfaction_weight: usize,
pub utxo: Utxo,
}
#[derive(Debug, Clone, PartialEq)]
pub enum Utxo {
Local(LocalUtxo),
Foreign {
outpoint: OutPoint,
psbt_input: Box<psbt::Input>,
},
}
impl Utxo {
pub fn outpoint(&self) -> OutPoint {
match &self {
Utxo::Local(local) => local.outpoint,
Utxo::Foreign { outpoint, .. } => *outpoint,
}
}
pub fn txout(&self) -> &TxOut {
match &self {
Utxo::Local(local) => &local.txout,
Utxo::Foreign {
outpoint,
psbt_input,
} => {
if let Some(prev_tx) = &psbt_input.non_witness_utxo {
return &prev_tx.output[outpoint.vout as usize];
}
if let Some(txout) = &psbt_input.witness_utxo {
return txout;
}
unreachable!("Foreign UTXOs will always have one of these set")
}
}
}
}
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Default)]
pub struct TransactionDetails {
pub transaction: Option<Transaction>,
pub txid: Txid,
pub received: u64,
pub sent: u64,
pub fee: Option<u64>,
pub confirmation_time: Option<ConfirmationTime>,
#[serde(default = "bool::default")]
pub verified: bool,
}
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Default)]
pub struct ConfirmationTime {
pub height: u32,
pub timestamp: u64,
}
impl ConfirmationTime {
pub fn new(height: Option<u32>, timestamp: Option<u64>) -> Option<Self> {
match (height, timestamp) {
(Some(height), Some(timestamp)) => Some(ConfirmationTime { height, timestamp }),
_ => None,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn can_store_feerate_in_const() {
const _MY_RATE: FeeRate = FeeRate::from_sat_per_vb(10.0);
const _MIN_RELAY: FeeRate = FeeRate::default_min_relay_fee();
}
}