From dcd8d583465c2fbc9d651050c093a82b2141b12d Mon Sep 17 00:00:00 2001 From: Jeffrey Czyz Date: Fri, 15 Dec 2023 15:37:18 -0600 Subject: [PATCH] Use CLTV_FAR_FAR_AWAY in PaymentConstraints 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. --- lightning/src/ln/channelmanager.rs | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lightning/src/ln/channelmanager.rs b/lightning/src/ln/channelmanager.rs index 9017f3ffd..dccc53ae8 100644 --- a/lightning/src/ln/channelmanager.rs +++ b/lightning/src/ln/channelmanager.rs @@ -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 { -- 2.39.5