Migrate some inner structs to TLVs

.github/workflows/build.yml

@@ -143,13 +143,13 @@ jobs:
         id: cache-graph
         uses: actions/cache@v2
         with:
-          path: lightning/net_graph-2021-02-12.bin
-          key: ldk-net_graph-05f0c5a0d772-2020-02-12.bin
+          path: lightning/net_graph-2021-05-27.bin
+          key: ldk-net_graph-45d86ead641d-2021-05-27.bin
       - name: Fetch routing graph snapshot
         if: steps.cache-graph.outputs.cache-hit != 'true'
         run: |
-          wget -O lightning/net_graph-2021-02-12.bin https://bitcoin.ninja/ldk-net_graph-05f0c5a0d772-2020-02-12.bin
-          if [ "$(sha256sum lightning/net_graph-2021-02-12.bin | awk '{ print $1 }')" != "7116fca78551fedc714a604cec0ad1ca66caa77bb4d0051290258e7a10e0c6e7" ]; then
+          wget -O lightning/net_graph-2021-05-27.bin https://bitcoin.ninja/ldk-net_graph-45d86ead641d-2021-05-27.bin
+          if [ "$(sha256sum lightning/net_graph-2021-05-27.bin | awk '{ print $1 }')" != "3d6261187cfa583255d978efb908b51c2f4dc4ad9a7160cd2c5263c9a4830121" ]; then
             echo "Bad hash"
             exit 1
           fi

lightning/src/chain/package.rs

@@ -21,7 +21,7 @@ use bitcoin::hash_types::Txid;
 use bitcoin::secp256k1::key::{SecretKey,PublicKey};
 
 use ln::PaymentPreimage;
-use ln::chan_utils::{TxCreationKeys, HTLCOutputInCommitment, HTLC_OUTPUT_IN_COMMITMENT_SIZE};
+use ln::chan_utils::{TxCreationKeys, HTLCOutputInCommitment};
 use ln::chan_utils;
 use ln::msgs::DecodeError;
 use chain::chaininterface::{FeeEstimator, ConfirmationTarget, MIN_RELAY_FEE_SAT_PER_1000_WEIGHT};
@@ -86,15 +86,15 @@ impl RevokedOutput {
 	}
 }
 
-impl_writeable!(RevokedOutput, 33*3 + 32 + 8 + 8 + 2, {
-	per_commitment_point,
-	counterparty_delayed_payment_base_key,
-	counterparty_htlc_base_key,
-	per_commitment_key,
-	weight,
-	amount,
-	on_counterparty_tx_csv
-});
+impl_writeable_tlv_based!(RevokedOutput, {
+	(0, per_commitment_point),
+	(2, counterparty_delayed_payment_base_key),
+	(4, counterparty_htlc_base_key),
+	(6, per_commitment_key),
+	(8, weight),
+	(10, amount),
+	(12, on_counterparty_tx_csv),
+}, {}, {});
 
 /// A struct to describe a revoked offered output and corresponding information to generate a
 /// solving witness.
@@ -130,15 +130,15 @@ impl RevokedHTLCOutput {
 	}
 }
 
-impl_writeable!(RevokedHTLCOutput, 33*3 + 32 + 8 + 8 + HTLC_OUTPUT_IN_COMMITMENT_SIZE, {
-	per_commitment_point,
-	counterparty_delayed_payment_base_key,
-	counterparty_htlc_base_key,
-	per_commitment_key,
-	weight,
-	amount,
-	htlc
-});
+impl_writeable_tlv_based!(RevokedHTLCOutput, {
+	(0, per_commitment_point),
+	(2, counterparty_delayed_payment_base_key),
+	(4, counterparty_htlc_base_key),
+	(6, per_commitment_key),
+	(8, weight),
+	(10, amount),
+	(12, htlc),
+}, {}, {});
 
 /// A struct to describe a HTLC output on a counterparty commitment transaction.
 ///
@@ -167,13 +167,13 @@ impl CounterpartyOfferedHTLCOutput {
 	}
 }
 
-impl_writeable!(CounterpartyOfferedHTLCOutput, 33*3 + 32 + HTLC_OUTPUT_IN_COMMITMENT_SIZE, {
-	per_commitment_point,
-	counterparty_delayed_payment_base_key,
-	counterparty_htlc_base_key,
-	preimage,
-	htlc
-});
+impl_writeable_tlv_based!(CounterpartyOfferedHTLCOutput, {
+	(0, per_commitment_point),
+	(2, counterparty_delayed_payment_base_key),
+	(4, counterparty_htlc_base_key),
+	(6, preimage),
+	(8, htlc),
+}, {}, {});
 
 /// A struct to describe a HTLC output on a counterparty commitment transaction.
 ///
@@ -198,12 +198,12 @@ impl CounterpartyReceivedHTLCOutput {
 	}
 }
 
-impl_writeable!(CounterpartyReceivedHTLCOutput, 33*3 + HTLC_OUTPUT_IN_COMMITMENT_SIZE, {
-	per_commitment_point,
-	counterparty_delayed_payment_base_key,
-	counterparty_htlc_base_key,
-	htlc
-});
+impl_writeable_tlv_based!(CounterpartyReceivedHTLCOutput, {
+	(0, per_commitment_point),
+	(2, counterparty_delayed_payment_base_key),
+	(4, counterparty_htlc_base_key),
+	(6, htlc),
+}, {}, {});
 
 /// A struct to describe a HTLC output on holder commitment transaction.
 ///
@@ -224,10 +224,11 @@ impl HolderHTLCOutput {
 	}
 }
 
-impl_writeable!(HolderHTLCOutput, 0, {
-	preimage,
-	amount
-});
+impl_writeable_tlv_based!(HolderHTLCOutput, {
+	(0, amount),
+}, {
+	(2, preimage),
+}, {});
 
 /// A struct to describe the channel output on the funding transaction.
 ///
@@ -245,9 +246,9 @@ impl HolderFundingOutput {
 	}
 }
 
-impl_writeable!(HolderFundingOutput, 0, {
-	funding_redeemscript
-});
+impl_writeable_tlv_based!(HolderFundingOutput, {
+	(0, funding_redeemscript),
+}, {}, {});
 
 /// A wrapper encapsulating all in-protocol differing outputs types.
 ///
@@ -703,10 +704,11 @@ impl Writeable for PackageTemplate {
 			outpoint.write(writer)?;
 			rev_outp.write(writer)?;
 		}
-		self.soonest_conf_deadline.write(writer)?;
-		self.feerate_previous.write(writer)?;
-		self.height_timer.write(writer)?;
-		self.height_original.write(writer)?;
+		write_tlv_fields!(writer, {
+			(0, self.soonest_conf_deadline),
+			(2, self.feerate_previous),
+			(4, self.height_original),
+		}, { (6, self.height_timer) });
 		Ok(())
 	}
 }
@@ -730,10 +732,15 @@ impl Readable for PackageTemplate {
 				PackageSolvingData::HolderFundingOutput(..) => { (PackageMalleability::Untractable, false) },
 			}
 		} else { return Err(DecodeError::InvalidValue); };
-		let soonest_conf_deadline = Readable::read(reader)?;
-		let feerate_previous = Readable::read(reader)?;
-		let height_timer = Readable::read(reader)?;
-		let height_original = Readable::read(reader)?;
+		let mut soonest_conf_deadline = 0;
+		let mut feerate_previous = 0;
+		let mut height_timer = None;
+		let mut height_original = 0;
+		read_tlv_fields!(reader, {
+			(0, soonest_conf_deadline),
+			(2, feerate_previous),
+			(4, height_original)
+		}, { (6, height_timer) });
 		Ok(PackageTemplate {
 			inputs,
 			malleability,

lightning/src/chain/transaction.rs

@@ -73,6 +73,14 @@ impl OutPoint {
 			vout: self.index as u32,
 		}
 	}
+
+	/// Creates a dummy BitcoinOutPoint, useful for deserializing into.
+	pub(crate) fn null() -> Self {
+		Self {
+			txid: Default::default(),
+			index: 0
+		}
+	}
 }
 
 impl_writeable!(OutPoint, 0, { txid, index });

lightning/src/ln/chan_utils.rs

@@ -178,6 +178,7 @@ impl Writeable for CounterpartyCommitmentSecrets {
 			writer.write_all(secret)?;
 			writer.write_all(&byte_utils::be64_to_array(*idx))?;
 		}
+		write_tlv_fields!(writer, {}, {});
 		Ok(())
 	}
 }
@@ -188,7 +189,7 @@ impl Readable for CounterpartyCommitmentSecrets {
 			*secret = Readable::read(reader)?;
 			*idx = Readable::read(reader)?;
 		}
-
+		read_tlv_fields!(reader, {}, {});
 		Ok(Self { old_secrets })
 	}
 }
@@ -322,8 +323,13 @@ pub struct TxCreationKeys {
 	pub broadcaster_delayed_payment_key: PublicKey,
 }
 
-impl_writeable!(TxCreationKeys, 33*5,
-	{ per_commitment_point, revocation_key, broadcaster_htlc_key, countersignatory_htlc_key, broadcaster_delayed_payment_key });
+impl_writeable_tlv_based!(TxCreationKeys, {
+	(0, per_commitment_point),
+	(2, revocation_key),
+	(4, broadcaster_htlc_key),
+	(6, countersignatory_htlc_key),
+	(8, broadcaster_delayed_payment_key),
+}, {}, {});
 
 /// One counterparty's public keys which do not change over the life of a channel.
 #[derive(Clone, PartialEq)]
@@ -349,14 +355,13 @@ pub struct ChannelPublicKeys {
 	pub htlc_basepoint: PublicKey,
 }
 
-impl_writeable!(ChannelPublicKeys, 33*5, {
-	funding_pubkey,
-	revocation_basepoint,
-	payment_point,
-	delayed_payment_basepoint,
-	htlc_basepoint
-});
-
+impl_writeable_tlv_based!(ChannelPublicKeys, {
+	(0, funding_pubkey),
+	(2, revocation_basepoint),
+	(4, payment_point),
+	(6, delayed_payment_basepoint),
+	(8, htlc_basepoint),
+}, {}, {});
 
 impl TxCreationKeys {
 	/// Create per-state keys from channel base points and the per-commitment point.
@@ -429,16 +434,14 @@ pub struct HTLCOutputInCommitment {
 	pub transaction_output_index: Option<u32>,
 }
 
-impl_writeable_len_match!(HTLCOutputInCommitment, {
-		{ HTLCOutputInCommitment { transaction_output_index: None, .. }, HTLC_OUTPUT_IN_COMMITMENT_SIZE - 4 },
-		{ _, HTLC_OUTPUT_IN_COMMITMENT_SIZE }
-	}, {
-	offered,
-	amount_msat,
-	cltv_expiry,
-	payment_hash,
-	transaction_output_index
-});
+impl_writeable_tlv_based!(HTLCOutputInCommitment, {
+	(0, offered),
+	(2, amount_msat),
+	(4, cltv_expiry),
+	(6, payment_hash),
+}, {
+	(8, transaction_output_index)
+}, {});
 
 #[inline]
 pub(crate) fn get_htlc_redeemscript_with_explicit_keys(htlc: &HTLCOutputInCommitment, broadcaster_htlc_key: &PublicKey, countersignatory_htlc_key: &PublicKey, revocation_key: &PublicKey) -> Script {
@@ -622,18 +625,19 @@ impl ChannelTransactionParameters {
 	}
 }
 
-impl_writeable!(CounterpartyChannelTransactionParameters, 0, {
-	pubkeys,
-	selected_contest_delay
-});
+impl_writeable_tlv_based!(CounterpartyChannelTransactionParameters, {
+	(0, pubkeys),
+	(2, selected_contest_delay),
+}, {}, {});
 
-impl_writeable!(ChannelTransactionParameters, 0, {
-	holder_pubkeys,
-	holder_selected_contest_delay,
-	is_outbound_from_holder,
-	counterparty_parameters,
-	funding_outpoint
-});
+impl_writeable_tlv_based!(ChannelTransactionParameters, {
+	(0, holder_pubkeys),
+	(2, holder_selected_contest_delay),
+	(4, is_outbound_from_holder),
+}, {
+	(6, counterparty_parameters),
+	(8, funding_outpoint),
+}, {});
 
 /// Static channel fields used to build transactions given per-commitment fields, organized by
 /// broadcaster/countersignatory.
@@ -715,8 +719,12 @@ impl PartialEq for HolderCommitmentTransaction {
 	}
 }
 
-impl_writeable!(HolderCommitmentTransaction, 0, {
-	inner, counterparty_sig, counterparty_htlc_sigs, holder_sig_first
+impl_writeable_tlv_based!(HolderCommitmentTransaction, {
+	(0, inner),
+	(2, counterparty_sig),
+	(4, holder_sig_first),
+}, {}, {
+	(6, counterparty_htlc_sigs),
 });
 
 impl HolderCommitmentTransaction {
@@ -800,7 +808,10 @@ pub struct BuiltCommitmentTransaction {
 	pub txid: Txid,
 }
 
-impl_writeable!(BuiltCommitmentTransaction, 0, { transaction, txid });
+impl_writeable_tlv_based!(BuiltCommitmentTransaction, {
+	(0, transaction),
+	(2, txid)
+}, {}, {});
 
 impl BuiltCommitmentTransaction {
 	/// Get the SIGHASH_ALL sighash value of the transaction.
@@ -883,15 +894,15 @@ impl Readable for Vec<HTLCOutputInCommitment> {
 	}
 }
 
-impl_writeable!(CommitmentTransaction, 0, {
-	commitment_number,
-	to_broadcaster_value_sat,
-	to_countersignatory_value_sat,
-	feerate_per_kw,
-	htlcs,
-	keys,
-	built
-});
+impl_writeable_tlv_based!(CommitmentTransaction, {
+	(0, commitment_number),
+	(2, to_broadcaster_value_sat),
+	(4, to_countersignatory_value_sat),
+	(6, feerate_per_kw),
+	(8, htlcs),
+	(10, keys),
+	(12, built),
+}, {}, {});
 
 impl CommitmentTransaction {
 	/// Construct an object of the class while assigning transaction output indices to HTLCs.