Fix build_router fee rate issue

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
         with:
           tool: nextest
       - run: |
-          RUST_BACKTRACE=full RUST_LOG=trace cargo nextest run
+          RUST_BACKTRACE=full RUST_LOG=trace cargo nextest run --no-fail-fast
 
   fmt:
     name: Rustfmt

Makefile

@@ -7,7 +7,7 @@ GRCOV_EXCL_LINE = ^\s*(\})*(\))*(;)*$$|\s*((log::|tracing::)?(trace|debug|info|w
 
 .PHONY: test
 test:
-	RUST_LOG=off cargo nextest run
+	RUST_LOG=off cargo nextest run --no-fail-fast
 
 .PHONY: clippy
 clippy:

src/fiber/graph.rs

@@ -113,6 +113,16 @@ impl ChannelInfo {
     pub fn funding_tx_block_number(&self) -> u64 {
         self.funding_tx_block_number
     }
+
+    fn get_update_info_with(&self, node: Pubkey) -> Option<&ChannelUpdateInfo> {
+        if self.node2() == node {
+            self.node1_to_node2.as_ref()
+        } else if self.node1() == node {
+            self.node2_to_node1.as_ref()
+        } else {
+            None
+        }
+    }
 }
 
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
@@ -520,6 +530,11 @@ where
         self.history.reset();
     }
 
+    #[cfg(test)]
+    pub fn set_source(&mut self, source: Pubkey) {
+        self.source = source;
+    }
+
     /// Returns a list of `PaymentHopData` for all nodes in the route,
     /// including the origin and the target node.
     pub fn build_route(
@@ -579,14 +594,11 @@ where
                 (0, 0)
             } else {
                 let channel_info = self
-                    .get_channel(&route[i + 1].channel_outpoint)
+                    .get_channel(&route[i].channel_outpoint)
                     .expect("channel not found");
-                let channel_update = &if channel_info.node1() == route[i + 1].target {
-                    channel_info.node2_to_node1.as_ref()
-                } else {
-                    channel_info.node1_to_node2.as_ref()
-                }
-                .expect("channel_update is none");
+                let channel_update = channel_info
+                    .get_update_info_with(route[i].target)
+                    .expect("channel_update is none");
                 let fee_rate = channel_update.fee_rate;
                 let fee = calculate_tlc_forward_fee(current_amount, fee_rate as u128);
                 let expiry = channel_update.htlc_expiry_delta;