///
/// (C-not exported) as we likely need to manually select one set of boolean type parameters.
#[derive(Eq, PartialEq, Debug, Clone)]
-pub struct InvoiceBuilder<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> {
+pub struct InvoiceBuilder<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> {
currency: Currency,
amount: Option<u64>,
si_prefix: Option<SiPrefix>,
phantom_h: std::marker::PhantomData<H>,
phantom_t: std::marker::PhantomData<T>,
phantom_c: std::marker::PhantomData<C>,
+ phantom_s: std::marker::PhantomData<S>,
}
/// Represents a syntactically and semantically correct lightning BOLT11 invoice.
pub const TAG_FEATURES: u8 = 5;
}
-impl InvoiceBuilder<tb::False, tb::False, tb::False, tb::False> {
+impl InvoiceBuilder<tb::False, tb::False, tb::False, tb::False, tb::False> {
/// Construct new, empty `InvoiceBuilder`. All necessary fields have to be filled first before
/// `InvoiceBuilder::build(self)` becomes available.
pub fn new(currrency: Currency) -> Self {
phantom_h: std::marker::PhantomData,
phantom_t: std::marker::PhantomData,
phantom_c: std::marker::PhantomData,
+ phantom_s: std::marker::PhantomData,
}
}
}
-impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, T, C> {
+impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, T, C, S> {
/// Helper function to set the completeness flags.
- fn set_flags<DN: tb::Bool, HN: tb::Bool, TN: tb::Bool, CN: tb::Bool>(self) -> InvoiceBuilder<DN, HN, TN, CN> {
- InvoiceBuilder::<DN, HN, TN, CN> {
+ fn set_flags<DN: tb::Bool, HN: tb::Bool, TN: tb::Bool, CN: tb::Bool, SN: tb::Bool>(self) -> InvoiceBuilder<DN, HN, TN, CN, SN> {
+ InvoiceBuilder::<DN, HN, TN, CN, SN> {
currency: self.currency,
amount: self.amount,
si_prefix: self.si_prefix,
phantom_h: std::marker::PhantomData,
phantom_t: std::marker::PhantomData,
phantom_c: std::marker::PhantomData,
+ phantom_s: std::marker::PhantomData,
}
}
self
}
- /// Sets the payment secret
- pub fn payment_secret(mut self, payment_secret: PaymentSecret) -> Self {
- self.tagged_fields.push(TaggedField::PaymentSecret(payment_secret));
- self
- }
-
/// Sets the expiry time
pub fn expiry_time(mut self, expiry_time: Duration) -> Self {
match ExpiryTime::from_duration(expiry_time) {
}
self
}
-
- /// Adds a features field which indicates the set of supported protocol extensions which the
- /// origin node supports.
- pub fn features(mut self, features: InvoiceFeatures) -> Self {
- self.tagged_fields.push(TaggedField::Features(features));
- self
- }
}
-impl<D: tb::Bool, H: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, tb::True, C> {
+impl<D: tb::Bool, H: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, tb::True, C, S> {
/// Builds a `RawInvoice` if no `CreationError` occurred while construction any of the fields.
pub fn build_raw(self) -> Result<RawInvoice, CreationError> {
}
}
-impl<H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<tb::False, H, T, C> {
+impl<H: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<tb::False, H, T, C, S> {
/// Set the description. This function is only available if no description (hash) was set.
- pub fn description(mut self, description: String) -> InvoiceBuilder<tb::True, H, T, C> {
+ pub fn description(mut self, description: String) -> InvoiceBuilder<tb::True, H, T, C, S> {
match Description::new(description) {
Ok(d) => self.tagged_fields.push(TaggedField::Description(d)),
Err(e) => self.error = Some(e),
}
/// Set the description hash. This function is only available if no description (hash) was set.
- pub fn description_hash(mut self, description_hash: sha256::Hash) -> InvoiceBuilder<tb::True, H, T, C> {
+ pub fn description_hash(mut self, description_hash: sha256::Hash) -> InvoiceBuilder<tb::True, H, T, C, S> {
self.tagged_fields.push(TaggedField::DescriptionHash(Sha256(description_hash)));
self.set_flags()
}
}
-impl<D: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, tb::False, T, C> {
+impl<D: tb::Bool, T: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, tb::False, T, C, S> {
/// Set the payment hash. This function is only available if no payment hash was set.
- pub fn payment_hash(mut self, hash: sha256::Hash) -> InvoiceBuilder<D, tb::True, T, C> {
+ pub fn payment_hash(mut self, hash: sha256::Hash) -> InvoiceBuilder<D, tb::True, T, C, S> {
self.tagged_fields.push(TaggedField::PaymentHash(Sha256(hash)));
self.set_flags()
}
}
-impl<D: tb::Bool, H: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, tb::False, C> {
+impl<D: tb::Bool, H: tb::Bool, C: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, tb::False, C, S> {
/// Sets the timestamp.
- pub fn timestamp(mut self, time: SystemTime) -> InvoiceBuilder<D, H, tb::True, C> {
+ pub fn timestamp(mut self, time: SystemTime) -> InvoiceBuilder<D, H, tb::True, C, S> {
match PositiveTimestamp::from_system_time(time) {
Ok(t) => self.timestamp = Some(t),
Err(e) => self.error = Some(e),
}
/// Sets the timestamp to the current UNIX timestamp.
- pub fn current_timestamp(mut self) -> InvoiceBuilder<D, H, tb::True, C> {
+ pub fn current_timestamp(mut self) -> InvoiceBuilder<D, H, tb::True, C, S> {
let now = PositiveTimestamp::from_system_time(SystemTime::now());
self.timestamp = Some(now.expect("for the foreseeable future this shouldn't happen"));
self.set_flags()
}
}
-impl<D: tb::Bool, H: tb::Bool, T: tb::Bool> InvoiceBuilder<D, H, T, tb::False> {
+impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, S: tb::Bool> InvoiceBuilder<D, H, T, tb::False, S> {
/// Sets `min_final_cltv_expiry`.
- pub fn min_final_cltv_expiry(mut self, min_final_cltv_expiry: u64) -> InvoiceBuilder<D, H, T, tb::True> {
+ pub fn min_final_cltv_expiry(mut self, min_final_cltv_expiry: u64) -> InvoiceBuilder<D, H, T, tb::True, S> {
self.tagged_fields.push(TaggedField::MinFinalCltvExpiry(MinFinalCltvExpiry(min_final_cltv_expiry)));
self.set_flags()
}
}
-impl InvoiceBuilder<tb::True, tb::True, tb::True, tb::True> {
+impl<D: tb::Bool, H: tb::Bool, T: tb::Bool, C: tb::Bool> InvoiceBuilder<D, H, T, C, tb::False> {
+ /// Sets the payment secret and relevant features.
+ pub fn payment_secret(mut self, payment_secret: PaymentSecret) -> InvoiceBuilder<D, H, T, C, tb::True> {
+ let features = InvoiceFeatures::empty()
+ .set_variable_length_onion_required()
+ .set_payment_secret_required();
+ self.tagged_fields.push(TaggedField::PaymentSecret(payment_secret));
+ self.tagged_fields.push(TaggedField::Features(features));
+ self.set_flags()
+ }
+}
+
+impl<S: tb::Bool> InvoiceBuilder<tb::True, tb::True, tb::True, tb::True, S> {
/// Builds and signs an invoice using the supplied `sign_function`. This function MAY NOT fail
/// and MUST produce a recoverable signature valid for the given hash and if applicable also for
/// the included payee public key.
};
invoice.check_field_counts().expect("should be ensured by type signature of builder");
+ invoice.check_feature_bits().expect("should be ensured by type signature of builder");
Ok(invoice)
}
Ok(())
}
+ /// Check that feature bits are set as required
+ fn check_feature_bits(&self) -> Result<(), SemanticError> {
+ // "If the payment_secret feature is set, MUST include exactly one s field."
+ let payment_secret_count = self.tagged_fields().filter(|&tf| match *tf {
+ TaggedField::PaymentSecret(_) => true,
+ _ => false,
+ }).count();
+ if payment_secret_count > 1 {
+ return Err(SemanticError::MultiplePaymentSecrets);
+ }
+
+ // "A writer MUST set an s field if and only if the payment_secret feature is set."
+ let has_payment_secret = payment_secret_count == 1;
+ let features = self.tagged_fields().find(|&tf| match *tf {
+ TaggedField::Features(_) => true,
+ _ => false,
+ });
+ match features {
+ None if has_payment_secret => Err(SemanticError::InvalidFeatures),
+ None => Ok(()),
+ Some(TaggedField::Features(features)) => {
+ if features.supports_payment_secret() && has_payment_secret {
+ Ok(())
+ } else if has_payment_secret {
+ Err(SemanticError::InvalidFeatures)
+ } else if features.supports_payment_secret() {
+ Err(SemanticError::InvalidFeatures)
+ } else {
+ Ok(())
+ }
+ },
+ Some(_) => unreachable!(),
+ }
+ }
+
/// Check that the invoice is signed correctly and that key recovery works
pub fn check_signature(&self) -> Result<(), SemanticError> {
match self.signed_invoice.recover_payee_pub_key() {
signed_invoice: signed_invoice,
};
invoice.check_field_counts()?;
+ invoice.check_feature_bits()?;
invoice.check_signature()?;
Ok(invoice)
/// The invoice contains multiple descriptions and/or description hashes which isn't allowed
MultipleDescriptions,
+ /// The invoice contains multiple payment secrets
+ MultiplePaymentSecrets,
+
+ /// The invoice's features are invalid
+ InvalidFeatures,
+
/// The recovery id doesn't fit the signature/pub key
InvalidRecoveryId,
SemanticError::MultiplePaymentHashes => f.write_str("The invoice has multiple payment hashes which isn't allowed"),
SemanticError::NoDescription => f.write_str("No description or description hash are part of the invoice"),
SemanticError::MultipleDescriptions => f.write_str("The invoice contains multiple descriptions and/or description hashes which isn't allowed"),
+ SemanticError::MultiplePaymentSecrets => f.write_str("The invoice contains multiple payment secrets"),
+ SemanticError::InvalidFeatures => f.write_str("The invoice's features are invalid"),
SemanticError::InvalidRecoveryId => f.write_str("The recovery id doesn't fit the signature/pub key"),
SemanticError::InvalidSignature => f.write_str("The invoice's signature is invalid"),
}
projects / rust-lightning / blobdiff