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#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use std::fmt::{Display, Formatter};
use std::str::FromStr;
use url::Url;
use bitcoin::Address;
use lnpbp::seals::OutpointHash;
use rgb::{Bech32, ContractId, FromBech32, ToBech32};
use super::AccountingValue;
#[derive(Clone, PartialEq, Eq, Debug, Display, Error, From)]
#[display(Debug)]
pub enum Error {
#[from]
Url(::url::ParseError),
WrongUrlScheme,
NonNullAuthority,
NoAsset,
WrongAssetEncoding,
NoAmount,
WrongAmountEncoding,
WrongOutpoint,
}
#[derive(Clone, PartialEq, Eq, Debug)]
pub enum OutpointDescriptor {
Utxo(bitcoin::OutPoint),
Address(bitcoin::Address),
}
#[derive(Clone, PartialEq, Eq, Debug)]
#[cfg_attr(
feature = "serde",
derive(Serialize, Deserialize,),
serde(crate = "serde_crate")
)]
pub enum Outpoint {
BlindedUtxo(OutpointHash),
Address(bitcoin::Address),
}
#[derive(Clone, PartialEq, Debug)]
pub struct Invoice {
pub contract_id: ContractId,
pub outpoint: Outpoint,
pub amount: AccountingValue,
}
impl From<OutpointDescriptor> for Outpoint {
#[inline]
fn from(descriptor: OutpointDescriptor) -> Self {
match descriptor {
OutpointDescriptor::Utxo(outpoint) => {
Self::BlindedUtxo(outpoint.into())
}
OutpointDescriptor::Address(addr) => Self::Address(addr),
}
}
}
impl FromStr for OutpointDescriptor {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match (Address::from_str(s), bitcoin::OutPoint::from_str(s)) {
(Ok(addr), _) => Ok(Self::Address(addr)),
(_, Ok(outpoint)) => Ok(Self::Utxo(outpoint)),
_ => Err(Error::WrongOutpoint),
}
}
}
impl FromStr for Outpoint {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match (Address::from_str(s), Bech32::from_str(s)) {
(Ok(addr), _) => Ok(Self::Address(addr)),
(_, Ok(Bech32::BlindedUtxo(outpoint))) => {
Ok(Self::BlindedUtxo(outpoint))
}
_ => Err(Error::WrongOutpoint),
}
}
}
impl FromStr for Invoice {
type Err = Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let url = Url::parse(s)?;
if url.scheme() != "rgb20" {
return Err(Error::WrongUrlScheme);
}
if url.has_authority() {
return Err(Error::NonNullAuthority);
}
let outpoint = url.path().parse()?;
let (_, amount) = url
.query_pairs()
.find(|(x, _)| x == "amount")
.ok_or(Error::NoAmount)?;
let amount = amount.parse().map_err(|_| Error::WrongAmountEncoding)?;
let (_, contract_id) = url
.query_pairs()
.find(|(x, _)| x == "asset")
.ok_or(Error::NoAsset)?;
let contract_id = ContractId::from_bech32_str(&contract_id)
.map_err(|_| Error::WrongAssetEncoding)?;
Ok(Invoice {
contract_id,
outpoint,
amount,
})
}
}
impl Display for OutpointDescriptor {
fn fmt(&self, f: &mut Formatter<'_>) -> ::core::fmt::Result {
match self {
Self::Utxo(outpoint) => write!(f, "{}", outpoint),
Self::Address(addr) => write!(f, "{}", addr),
}
}
}
impl Display for Outpoint {
fn fmt(&self, f: &mut Formatter<'_>) -> ::core::fmt::Result {
match self {
Self::BlindedUtxo(outpoint) => {
write!(f, "{}", Bech32::BlindedUtxo(outpoint.clone()))
}
Self::Address(addr) => write!(f, "{}", addr),
}
}
}
impl Display for Invoice {
fn fmt(&self, f: &mut Formatter<'_>) -> ::core::fmt::Result {
let url = Url::parse(&format!(
"rgb20:{}?asset={}&amount={}",
self.outpoint,
self.contract_id.to_bech32(),
self.amount
))
.expect("Internal Url generation error");
write!(f, "{}", url)
}
}