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fix: use the update_add_htlc's cltv_expiry for comparison

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As noted in BOLT 4, we should be using the update_add_htlc's cltv_expiry,
not the CLTV expiry set by the sender in the onion for this comparison.
See here: 4dcc377209/04-onion-routing.md (L334)
This commit is contained in:
Vladimir Fomene 2023-10-02 22:05:42 +03:00
parent 6cafba9f5b
commit 33715e87d8
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GPG key ID: 4D8AB1DF0F7BFBC3
1 changed files with 25 additions and 1 deletions
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26
lightning/src/ln/channelmanager.rs
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@ -2940,7 +2940,7 @@ where
// payment logic has enough time to fail the HTLC backward before our onchain logic triggers a
// channel closure (see HTLC_FAIL_BACK_BUFFER rationale).
let current_height: u32 = self.best_block.read().unwrap().height();
if (outgoing_cltv_value as u64) <= current_height as u64 + HTLC_FAIL_BACK_BUFFER as u64 + 1 {
if cltv_expiry <= current_height + HTLC_FAIL_BACK_BUFFER + 1 {
let mut err_data = Vec::with_capacity(12);
err_data.extend_from_slice(&amt_msat.to_be_bytes());
err_data.extend_from_slice(&current_height.to_be_bytes());
@ -11096,6 +11096,30 @@ mod tests {
sender_intended_amt_msat - extra_fee_msat, 42, None, true, Some(extra_fee_msat)).is_ok());
}
#[test]
fn test_final_incorrect_cltv(){
let chanmon_cfg = create_chanmon_cfgs(1);
let node_cfg = create_node_cfgs(1, &chanmon_cfg);
let node_chanmgr = create_node_chanmgrs(1, &node_cfg, &[None]);
let node = create_network(1, &node_cfg, &node_chanmgr);
let result = node[0].node.construct_recv_pending_htlc_info(msgs::InboundOnionPayload::Receive {
amt_msat: 100,
outgoing_cltv_value: 22,
payment_metadata: None,
keysend_preimage: None,
payment_data: Some(msgs::FinalOnionHopData {
payment_secret: PaymentSecret([0; 32]), total_msat: 100,
}),
custom_tlvs: Vec::new(),
}, [0; 32], PaymentHash([0; 32]), 100, 23, None, true, None);
// Should not return an error as this condition:
// https://github.com/lightning/bolts/blob/4dcc377209509b13cf89a4b91fde7d478f5b46d8/04-onion-routing.md?plain=1#L334
// is not satisfied.
assert!(result.is_ok());
}
#[test]
fn test_inbound_anchors_manual_acceptance() {
// Tests that we properly limit inbound channels when we have the manual-channel-acceptance