Add MIN_RELAY_FEE_SAT_PER_1000_WEIGHT

Hardcode min relay fee as its value is fixed on the bitcoin network
and updating it would be done really conservatively.

diff --git a/lightning/src/chain/chaininterface.rs b/lightning/src/chain/chaininterface.rs
index 92c9c102597b8546e6ca42f3272d5f0cb9e2289f..ac7ba05a037c6b733d0d5f5aaa2274226944c813 100644 (file)
--- a/lightning/src/chain/chaininterface.rs
+++ b/lightning/src/chain/chaininterface.rs
@@ -115,6 +115,9 @@ pub trait FeeEstimator: Sync + Send {
        fn get_est_sat_per_1000_weight(&self, confirmation_target: ConfirmationTarget) -> u64;
 }
 
+/// Minimum relay fee as required by bitcoin network mempool policy.
+pub const MIN_RELAY_FEE_SAT_PER_1000_WEIGHT: u64 = 4000;
+
 /// Utility for tracking registered txn/outpoints and checking for matches
 pub struct ChainWatchedUtil {
        watch_all: bool,