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Clean up fee_insufficient computation

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Jeffrey Czyz 2021-10-11 13:18:49 -05:00
parent f5abc93978
commit 1e2ca5233b
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1 changed files with 6 additions and 4 deletions
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10
lightning/src/ln/onion_utils.rs
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@ -404,10 +404,12 @@ pub(super) fn process_onion_failure<T: secp256k1::Signing, L: Deref>(secp_ctx: &
let is_chan_update_invalid = match error_code & 0xff {
7 => false,
11 => amt_to_forward > chan_update.contents.htlc_minimum_msat,
12 => {
let new_fee = amt_to_forward.checked_mul(chan_update.contents.fee_proportional_millionths as u64).and_then(|prop_fee| { (prop_fee / 1000000).checked_add(chan_update.contents.fee_base_msat as u64) });
new_fee.is_some() && route_hop.fee_msat >= new_fee.unwrap()
}
12 => amt_to_forward
.checked_mul(chan_update.contents.fee_proportional_millionths as u64)
.map(|prop_fee| prop_fee / 1_000_000)
.and_then(|prop_fee| prop_fee.checked_add(chan_update.contents.fee_base_msat as u64))
.map(|fee_msats| route_hop.fee_msat >= fee_msats)
.unwrap_or(false),
13 => route_hop.cltv_expiry_delta as u16 >= chan_update.contents.cltv_expiry_delta,
14 => false, // expiry_too_soon; always valid?
20 => chan_update.contents.flags & 2 == 0,