1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517
// Bitcoin Dev Kit
// Written in 2020 by Alekos Filini <alekos.filini@gmail.com>
//
// Copyright (c) 2020-2021 Bitcoin Dev Kit Developers
//
// This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
// or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
// You may not use this file except in accordance with one or both of these
// licenses.
use std::convert::AsRef;
use std::ops::Sub;
use bitcoin::blockdata::transaction::{OutPoint, Transaction, TxOut};
use bitcoin::{hash_types::Txid, psbt, Weight};
use serde::{Deserialize, Serialize};
/// Types of keychains
#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum KeychainKind {
/// External
External = 0,
/// Internal, usually used for change outputs
Internal = 1,
}
impl KeychainKind {
/// Return [`KeychainKind`] as a byte
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",
}
}
}
/// Fee rate
#[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
// Internally stored as satoshi/vbyte
pub struct FeeRate(f32);
impl FeeRate {
/// Create a new instance checking the value provided
///
/// ## Panics
///
/// Panics if the value is not [normal](https://doc.rust-lang.org/std/primitive.f32.html#method.is_normal) (except if it's a positive zero) or negative.
fn new_checked(value: f32) -> Self {
assert!(value.is_normal() || value == 0.0);
assert!(value.is_sign_positive());
FeeRate(value)
}
/// Create a new instance of [`FeeRate`] given a float fee rate in sats/kwu
pub fn from_sat_per_kwu(sat_per_kwu: f32) -> Self {
FeeRate::new_checked(sat_per_kwu / 250.0_f32)
}
/// Create a new instance of [`FeeRate`] given a float fee rate in sats/kvb
pub fn from_sat_per_kvb(sat_per_kvb: f32) -> Self {
FeeRate::new_checked(sat_per_kvb / 1000.0_f32)
}
/// Create a new instance of [`FeeRate`] given a float fee rate in btc/kvbytes
///
/// ## Panics
///
/// Panics if the value is not [normal](https://doc.rust-lang.org/std/primitive.f32.html#method.is_normal) (except if it's a positive zero) or negative.
pub fn from_btc_per_kvb(btc_per_kvb: f32) -> Self {
FeeRate::new_checked(btc_per_kvb * 1e5)
}
/// Create a new instance of [`FeeRate`] given a float fee rate in satoshi/vbyte
///
/// ## Panics
///
/// Panics if the value is not [normal](https://doc.rust-lang.org/std/primitive.f32.html#method.is_normal) (except if it's a positive zero) or negative.
pub fn from_sat_per_vb(sat_per_vb: f32) -> Self {
FeeRate::new_checked(sat_per_vb)
}
/// Create a new [`FeeRate`] with the default min relay fee value
pub const fn default_min_relay_fee() -> Self {
FeeRate(1.0)
}
/// Calculate fee rate from `fee` and weight units (`wu`).
pub fn from_wu(fee: u64, wu: Weight) -> FeeRate {
Self::from_vb(fee, wu.to_vbytes_ceil() as usize)
}
/// Calculate fee rate from `fee` and `vbytes`.
pub fn from_vb(fee: u64, vbytes: usize) -> FeeRate {
let rate = fee as f32 / vbytes as f32;
Self::from_sat_per_vb(rate)
}
/// Return the value as satoshi/vbyte
pub fn as_sat_per_vb(&self) -> f32 {
self.0
}
/// Calculate absolute fee in Satoshis using size in weight units.
pub fn fee_wu(&self, wu: Weight) -> u64 {
self.fee_vb(wu.to_vbytes_ceil() as usize)
}
/// Calculate absolute fee in Satoshis using size in virtual bytes.
pub fn fee_vb(&self, vbytes: usize) -> u64 {
(self.as_sat_per_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)
}
}
/// Trait implemented by types that can be used to measure weight units.
pub trait Vbytes {
/// Convert weight units to virtual bytes.
fn vbytes(self) -> usize;
}
impl Vbytes for usize {
fn vbytes(self) -> usize {
// ref: https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki#transaction-size-calculations
(self as f32 / 4.0).ceil() as usize
}
}
/// An unspent output owned by a [`Wallet`].
///
/// [`Wallet`]: crate::Wallet
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Hash)]
pub struct LocalUtxo {
/// Reference to a transaction output
pub outpoint: OutPoint,
/// Transaction output
pub txout: TxOut,
/// Type of keychain
pub keychain: KeychainKind,
/// Whether this UTXO is spent or not
pub is_spent: bool,
}
/// A [`Utxo`] with its `satisfaction_weight`.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct WeightedUtxo {
/// The weight of the witness data and `scriptSig` expressed in [weight units]. This is used to
/// properly maintain the feerate when adding this input to a transaction during coin selection.
///
/// [weight units]: https://en.bitcoin.it/wiki/Weight_units
pub satisfaction_weight: usize,
/// The UTXO
pub utxo: Utxo,
}
#[derive(Debug, Clone, PartialEq, Eq)]
/// An unspent transaction output (UTXO).
pub enum Utxo {
/// A UTXO owned by the local wallet.
Local(LocalUtxo),
/// A UTXO owned by another wallet.
Foreign {
/// The location of the output.
outpoint: OutPoint,
/// The information about the input we require to add it to a PSBT.
// Box it to stop the type being too big.
psbt_input: Box<psbt::Input>,
},
}
impl Utxo {
/// Get the location of the UTXO
pub fn outpoint(&self) -> OutPoint {
match &self {
Utxo::Local(local) => local.outpoint,
Utxo::Foreign { outpoint, .. } => *outpoint,
}
}
/// Get the `TxOut` of the UTXO
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")
}
}
}
}
/// A wallet transaction
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq)]
pub struct TransactionDetails {
/// Optional transaction
pub transaction: Option<Transaction>,
/// Transaction id
pub txid: Txid,
/// Received value (sats)
/// Sum of owned outputs of this transaction.
pub received: u64,
/// Sent value (sats)
/// Sum of owned inputs of this transaction.
pub sent: u64,
/// Fee value (sats) if confirmed.
/// The availability of the fee depends on the backend. It's never `None` with an Electrum
/// Server backend, but it could be `None` with a Bitcoin RPC node without txindex that receive
/// funds while offline.
pub fee: Option<u64>,
/// If the transaction is confirmed, contains height and Unix timestamp of the block containing the
/// transaction, unconfirmed transaction contains `None`.
pub confirmation_time: Option<BlockTime>,
}
impl PartialOrd for TransactionDetails {
fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
Some(self.cmp(other))
}
}
impl Ord for TransactionDetails {
fn cmp(&self, other: &Self) -> std::cmp::Ordering {
self.confirmation_time
.cmp(&other.confirmation_time)
.then_with(|| self.txid.cmp(&other.txid))
}
}
/// Block height and timestamp of a block
#[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Default)]
pub struct BlockTime {
/// confirmation block height
pub height: u32,
/// confirmation block timestamp
pub timestamp: u64,
}
impl PartialOrd for BlockTime {
fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
Some(self.cmp(other))
}
}
impl Ord for BlockTime {
fn cmp(&self, other: &Self) -> std::cmp::Ordering {
self.height
.cmp(&other.height)
.then_with(|| self.timestamp.cmp(&other.timestamp))
}
}
/// **DEPRECATED**: Confirmation time of a transaction
///
/// The structure has been renamed to `BlockTime`
#[deprecated(note = "This structure has been renamed to `BlockTime`")]
pub type ConfirmationTime = BlockTime;
impl BlockTime {
/// Returns `Some` `BlockTime` if both `height` and `timestamp` are `Some`
pub fn new(height: Option<u32>, timestamp: Option<u64>) -> Option<Self> {
match (height, timestamp) {
(Some(height), Some(timestamp)) => Some(BlockTime { height, timestamp }),
_ => None,
}
}
}
/// Balance differentiated in various categories
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone, Default)]
pub struct Balance {
/// All coinbase outputs not yet matured
pub immature: u64,
/// Unconfirmed UTXOs generated by a wallet tx
pub trusted_pending: u64,
/// Unconfirmed UTXOs received from an external wallet
pub untrusted_pending: u64,
/// Confirmed and immediately spendable balance
pub confirmed: u64,
}
impl Balance {
/// Get sum of trusted_pending and confirmed coins
pub fn get_spendable(&self) -> u64 {
self.confirmed + self.trusted_pending
}
/// Get the whole balance visible to the wallet
pub fn get_total(&self) -> u64 {
self.confirmed + self.trusted_pending + self.untrusted_pending + self.immature
}
}
impl std::fmt::Display for Balance {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{{ immature: {}, trusted_pending: {}, untrusted_pending: {}, confirmed: {} }}",
self.immature, self.trusted_pending, self.untrusted_pending, self.confirmed
)
}
}
impl std::ops::Add for Balance {
type Output = Self;
fn add(self, other: Self) -> Self {
Self {
immature: self.immature + other.immature,
trusted_pending: self.trusted_pending + other.trusted_pending,
untrusted_pending: self.untrusted_pending + other.untrusted_pending,
confirmed: self.confirmed + other.confirmed,
}
}
}
impl std::iter::Sum for Balance {
fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
iter.fold(
Balance {
..Default::default()
},
|a, b| a + b,
)
}
}
#[cfg(test)]
mod tests {
use super::*;
use bitcoin::hashes::Hash;
#[test]
fn sort_block_time() {
let block_time_a = BlockTime {
height: 100,
timestamp: 100,
};
let block_time_b = BlockTime {
height: 100,
timestamp: 110,
};
let block_time_c = BlockTime {
height: 0,
timestamp: 0,
};
let mut vec = vec![
block_time_a.clone(),
block_time_b.clone(),
block_time_c.clone(),
];
vec.sort();
let expected = vec![block_time_c, block_time_a, block_time_b];
assert_eq!(vec, expected)
}
#[test]
fn sort_tx_details() {
let block_time_a = BlockTime {
height: 100,
timestamp: 100,
};
let block_time_b = BlockTime {
height: 0,
timestamp: 0,
};
let tx_details_a = TransactionDetails {
transaction: None,
txid: Txid::all_zeros(),
received: 0,
sent: 0,
fee: None,
confirmation_time: None,
};
let tx_details_b = TransactionDetails {
transaction: None,
txid: Txid::all_zeros(),
received: 0,
sent: 0,
fee: None,
confirmation_time: Some(block_time_a),
};
let tx_details_c = TransactionDetails {
transaction: None,
txid: Txid::all_zeros(),
received: 0,
sent: 0,
fee: None,
confirmation_time: Some(block_time_b.clone()),
};
let tx_details_d = TransactionDetails {
transaction: None,
txid: Txid::from_byte_array([1; Txid::LEN]),
received: 0,
sent: 0,
fee: None,
confirmation_time: Some(block_time_b),
};
let mut vec = vec![
tx_details_a.clone(),
tx_details_b.clone(),
tx_details_c.clone(),
tx_details_d.clone(),
];
vec.sort();
let expected = vec![tx_details_a, tx_details_c, tx_details_d, tx_details_b];
assert_eq!(vec, expected)
}
#[test]
fn can_store_feerate_in_const() {
const _MIN_RELAY: FeeRate = FeeRate::default_min_relay_fee();
}
#[test]
#[should_panic]
fn test_invalid_feerate_neg_zero() {
let _ = FeeRate::from_sat_per_vb(-0.0);
}
#[test]
#[should_panic]
fn test_invalid_feerate_neg_value() {
let _ = FeeRate::from_sat_per_vb(-5.0);
}
#[test]
#[should_panic]
fn test_invalid_feerate_nan() {
let _ = FeeRate::from_sat_per_vb(f32::NAN);
}
#[test]
#[should_panic]
fn test_invalid_feerate_inf() {
let _ = FeeRate::from_sat_per_vb(f32::INFINITY);
}
#[test]
fn test_valid_feerate_pos_zero() {
let _ = FeeRate::from_sat_per_vb(0.0);
}
#[test]
fn test_fee_from_btc_per_kvb() {
let fee = FeeRate::from_btc_per_kvb(1e-5);
assert!((fee.as_sat_per_vb() - 1.0).abs() < f32::EPSILON);
}
#[test]
fn test_fee_from_sat_per_vbyte() {
let fee = FeeRate::from_sat_per_vb(1.0);
assert!((fee.as_sat_per_vb() - 1.0).abs() < f32::EPSILON);
}
#[test]
fn test_fee_default_min_relay_fee() {
let fee = FeeRate::default_min_relay_fee();
assert!((fee.as_sat_per_vb() - 1.0).abs() < f32::EPSILON);
}
#[test]
fn test_fee_from_sat_per_kvb() {
let fee = FeeRate::from_sat_per_kvb(1000.0);
assert!((fee.as_sat_per_vb() - 1.0).abs() < f32::EPSILON);
}
#[test]
fn test_fee_from_sat_per_kwu() {
let fee = FeeRate::from_sat_per_kwu(250.0);
assert!((fee.as_sat_per_vb() - 1.0).abs() < f32::EPSILON);
}
}