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Use CLTV_FAR_FAR_AWAY in PaymentConstraints

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When finding a route through a blinded path, a random CLTV offset may be
added to the path in order to preserve privacy. This needs to be
accounted for in the blinded path's PaymentConstraints. Add
CLTV_FAR_FAR_AWAY to the max_cltv_expiry constraint to allow for such
offsets.
This commit is contained in:
Jeffrey Czyz 2023-12-15 15:37:18 -06:00
parent c558ccd6a9
commit dcd8d58346
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1 changed files with 2 additions and 1 deletions
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3
lightning/src/ln/channelmanager.rs
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@ -7876,7 +7876,8 @@ where
let secp_ctx = &self.secp_ctx;
let payee_node_id = self.get_our_node_id();
let max_cltv_expiry = self.best_block.read().unwrap().height() + LATENCY_GRACE_PERIOD_BLOCKS;
let max_cltv_expiry = self.best_block.read().unwrap().height() + CLTV_FAR_FAR_AWAY
+ LATENCY_GRACE_PERIOD_BLOCKS;
let payee_tlvs = ReceiveTlvs {
payment_secret,
payment_constraints: PaymentConstraints {