//! Parsing and formatting for bech32 message encoding.
use bitcoin::bech32;
-use bitcoin::bech32::{FromBase32, ToBase32};
+use bitcoin::secp256k1;
use core::convert::TryFrom;
-use core::fmt;
use crate::io;
use crate::ln::msgs::DecodeError;
use crate::util::ser::SeekReadable;
use crate::prelude::*;
-/// Indicates a message can be encoded using bech32.
-pub(super) trait Bech32Encode: AsRef<[u8]> + TryFrom<Vec<u8>, Error=ParseError> {
- /// Human readable part of the message's bech32 encoding.
- const BECH32_HRP: &'static str;
-
- /// Parses a bech32-encoded message into a TLV stream.
- fn from_bech32_str(s: &str) -> Result<Self, ParseError> {
- // Offer encoding may be split by '+' followed by optional whitespace.
- let encoded = match s.split('+').skip(1).next() {
- Some(_) => {
- for chunk in s.split('+') {
- let chunk = chunk.trim_start();
- if chunk.is_empty() || chunk.contains(char::is_whitespace) {
- return Err(ParseError::InvalidContinuation);
+#[cfg(not(fuzzing))]
+pub(super) use sealed::Bech32Encode;
+
+#[cfg(fuzzing)]
+pub use sealed::Bech32Encode;
+
+mod sealed {
+ use bitcoin::bech32;
+ use bitcoin::bech32::{FromBase32, ToBase32};
+ use core::convert::TryFrom;
+ use core::fmt;
+ use super::Bolt12ParseError;
+
+ use crate::prelude::*;
+
+ /// Indicates a message can be encoded using bech32.
+ pub trait Bech32Encode: AsRef<[u8]> + TryFrom<Vec<u8>, Error=Bolt12ParseError> {
+ /// Human readable part of the message's bech32 encoding.
+ const BECH32_HRP: &'static str;
+
+ /// Parses a bech32-encoded message into a TLV stream.
+ fn from_bech32_str(s: &str) -> Result<Self, Bolt12ParseError> {
+ // Offer encoding may be split by '+' followed by optional whitespace.
+ let encoded = match s.split('+').skip(1).next() {
+ Some(_) => {
+ for chunk in s.split('+') {
+ let chunk = chunk.trim_start();
+ if chunk.is_empty() || chunk.contains(char::is_whitespace) {
+ return Err(Bolt12ParseError::InvalidContinuation);
+ }
}
- }
- let s = s.chars().filter(|c| *c != '+' && !c.is_whitespace()).collect::<String>();
- Bech32String::Owned(s)
- },
- None => Bech32String::Borrowed(s),
- };
+ let s: String = s.chars().filter(|c| *c != '+' && !c.is_whitespace()).collect();
+ Bech32String::Owned(s)
+ },
+ None => Bech32String::Borrowed(s),
+ };
- let (hrp, data) = bech32::decode_without_checksum(encoded.as_ref())?;
+ let (hrp, data) = bech32::decode_without_checksum(encoded.as_ref())?;
- if hrp != Self::BECH32_HRP {
- return Err(ParseError::InvalidBech32Hrp);
- }
+ if hrp != Self::BECH32_HRP {
+ return Err(Bolt12ParseError::InvalidBech32Hrp);
+ }
- let data = Vec::<u8>::from_base32(&data)?;
- Self::try_from(data)
- }
+ let data = Vec::<u8>::from_base32(&data)?;
+ Self::try_from(data)
+ }
- /// Formats the message using bech32-encoding.
- fn fmt_bech32_str(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
- bech32::encode_without_checksum_to_fmt(f, Self::BECH32_HRP, self.as_ref().to_base32())
- .expect("HRP is invalid").unwrap();
+ /// Formats the message using bech32-encoding.
+ fn fmt_bech32_str(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+ bech32::encode_without_checksum_to_fmt(f, Self::BECH32_HRP, self.as_ref().to_base32())
+ .expect("HRP is invalid").unwrap();
- Ok(())
+ Ok(())
+ }
}
-}
-// Used to avoid copying a bech32 string not containing the continuation character (+).
-enum Bech32String<'a> {
- Borrowed(&'a str),
- Owned(String),
-}
+ // Used to avoid copying a bech32 string not containing the continuation character (+).
+ enum Bech32String<'a> {
+ Borrowed(&'a str),
+ Owned(String),
+ }
-impl<'a> AsRef<str> for Bech32String<'a> {
- fn as_ref(&self) -> &str {
- match self {
- Bech32String::Borrowed(s) => s,
- Bech32String::Owned(s) => s,
+ impl<'a> AsRef<str> for Bech32String<'a> {
+ fn as_ref(&self) -> &str {
+ match self {
+ Bech32String::Borrowed(s) => s,
+ Bech32String::Owned(s) => s,
+ }
}
}
}
}
/// Error when parsing a bech32 encoded message using [`str::parse`].
-#[derive(Debug, PartialEq)]
-pub enum ParseError {
+#[derive(Clone, Debug, PartialEq)]
+pub enum Bolt12ParseError {
/// The bech32 encoding does not conform to the BOLT 12 requirements for continuing messages
/// across multiple parts (i.e., '+' followed by whitespace).
InvalidContinuation,
/// The bech32 decoded string could not be decoded as the expected message type.
Decode(DecodeError),
/// The parsed message has invalid semantics.
- InvalidSemantics(SemanticError),
+ InvalidSemantics(Bolt12SemanticError),
+ /// The parsed message has an invalid signature.
+ InvalidSignature(secp256k1::Error),
}
/// Error when interpreting a TLV stream as a specific type.
-#[derive(Debug, PartialEq)]
-pub enum SemanticError {
+#[derive(Clone, Debug, PartialEq)]
+pub enum Bolt12SemanticError {
+ /// The current [`std::time::SystemTime`] is past the offer or invoice's expiration.
+ AlreadyExpired,
+ /// The provided chain hash does not correspond to a supported chain.
+ UnsupportedChain,
+ /// A chain was provided but was not expected.
+ UnexpectedChain,
/// An amount was expected but was missing.
MissingAmount,
/// The amount exceeded the total bitcoin supply.
InvalidAmount,
+ /// An amount was provided but was not sufficient in value.
+ InsufficientAmount,
+ /// An amount was provided but was not expected.
+ UnexpectedAmount,
/// A currency was provided that is not supported.
UnsupportedCurrency,
+ /// A feature was required but is unknown.
+ UnknownRequiredFeatures,
+ /// Features were provided but were not expected.
+ UnexpectedFeatures,
/// A required description was not provided.
MissingDescription,
/// A signing pubkey was not provided.
MissingSigningPubkey,
+ /// A signing pubkey was provided but a different one was expected.
+ InvalidSigningPubkey,
+ /// A signing pubkey was provided but was not expected.
+ UnexpectedSigningPubkey,
+ /// A quantity was expected but was missing.
+ MissingQuantity,
/// An unsupported quantity was provided.
InvalidQuantity,
+ /// A quantity or quantity bounds was provided but was not expected.
+ UnexpectedQuantity,
+ /// Metadata could not be used to verify the offers message.
+ InvalidMetadata,
+ /// Metadata was provided but was not expected.
+ UnexpectedMetadata,
+ /// Payer metadata was expected but was missing.
+ MissingPayerMetadata,
+ /// A payer id was expected but was missing.
+ MissingPayerId,
+ /// Blinded paths were expected but were missing.
+ MissingPaths,
+ /// The blinded payinfo given does not match the number of blinded path hops.
+ InvalidPayInfo,
+ /// An invoice creation time was expected but was missing.
+ MissingCreationTime,
+ /// An invoice payment hash was expected but was missing.
+ MissingPaymentHash,
+ /// A signature was expected but was missing.
+ MissingSignature,
}
-impl From<bech32::Error> for ParseError {
+impl From<bech32::Error> for Bolt12ParseError {
fn from(error: bech32::Error) -> Self {
Self::Bech32(error)
}
}
-impl From<DecodeError> for ParseError {
+impl From<DecodeError> for Bolt12ParseError {
fn from(error: DecodeError) -> Self {
Self::Decode(error)
}
}
-impl From<SemanticError> for ParseError {
- fn from(error: SemanticError) -> Self {
+impl From<Bolt12SemanticError> for Bolt12ParseError {
+ fn from(error: Bolt12SemanticError) -> Self {
Self::InvalidSemantics(error)
}
}
+
+impl From<secp256k1::Error> for Bolt12ParseError {
+ fn from(error: secp256k1::Error) -> Self {
+ Self::InvalidSignature(error)
+ }
+}