Document nonzero anchors in features module.

[rust-lightning] / lightning / src / ln / chan_utils.rs

diff --git a/lightning/src/ln/chan_utils.rs b/lightning/src/ln/chan_utils.rs
index 9699cc78a1a3253a7635277d22c133a3517b2804..6ca5c929f1d6eccb4306a6403313fd21d0044362 100644 (file)
--- a/lightning/src/ln/chan_utils.rs
+++ b/lightning/src/ln/chan_utils.rs
@@ -8,7 +8,7 @@
 // licenses.
 
 //! Various utilities for building scripts and deriving keys related to channels. These are
-//! largely of interest for those implementing the traits on [`chain::keysinterface`] by hand.
+//! largely of interest for those implementing the traits on [`crate::sign`] by hand.
 
 use bitcoin::blockdata::script::{Script,Builder};
 use bitcoin::blockdata::opcodes;
@@ -21,7 +21,7 @@ use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::hashes::ripemd160::Hash as Ripemd160;
 use bitcoin::hash_types::{Txid, PubkeyHash};
 
-use crate::chain::keysinterface::EntropySource;
+use crate::sign::EntropySource;
 use crate::ln::{PaymentHash, PaymentPreimage};
 use crate::ln::msgs::DecodeError;
 use crate::util::ser::{Readable, Writeable, Writer};
@@ -57,6 +57,15 @@ pub(crate) const MIN_ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 136;
 /// This is the maximum post-anchor value.
 pub const MAX_ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 143;
 
+/// The upper bound weight of an anchor input.
+pub const ANCHOR_INPUT_WITNESS_WEIGHT: u64 = 116;
+/// The upper bound weight of an HTLC timeout input from a commitment transaction with anchor
+/// outputs.
+pub const HTLC_TIMEOUT_INPUT_ANCHOR_WITNESS_WEIGHT: u64 = 288;
+/// The upper bound weight of an HTLC success input from a commitment transaction with anchor
+/// outputs.
+pub const HTLC_SUCCESS_INPUT_ANCHOR_WITNESS_WEIGHT: u64 = 327;
+
 /// Gets the weight for an HTLC-Success transaction.
 #[inline]
 pub fn htlc_success_tx_weight(opt_anchors: bool) -> u64 {
@@ -1655,7 +1664,7 @@ mod tests {
        use crate::ln::chan_utils::{get_htlc_redeemscript, get_to_countersignatory_with_anchors_redeemscript, CommitmentTransaction, TxCreationKeys, ChannelTransactionParameters, CounterpartyChannelTransactionParameters, HTLCOutputInCommitment};
        use bitcoin::secp256k1::{PublicKey, SecretKey, Secp256k1};
        use crate::util::test_utils;
-       use crate::chain::keysinterface::{ChannelSigner, SignerProvider};
+       use crate::sign::{ChannelSigner, SignerProvider};
        use bitcoin::{Network, Txid};
        use bitcoin::hashes::Hash;
        use crate::ln::PaymentHash;