itest: preparatory fee estimation changes

lntest/harness.go

@@ -1614,8 +1614,8 @@ func (h *HarnessTest) mineTillForceCloseResolved(hn *node.HarnessNode) {
 // CreatePayReqs is a helper method that will create a slice of payment
 // requests for the given node.
 func (h *HarnessTest) CreatePayReqs(hn *node.HarnessNode,
-	paymentAmt btcutil.Amount, numInvoices int) ([]string,
-	[][]byte, []*lnrpc.Invoice) {
+	paymentAmt btcutil.Amount, numInvoices int,
+	routeHints ...*lnrpc.RouteHint) ([]string, [][]byte, []*lnrpc.Invoice) {
 
 	payReqs := make([]string, numInvoices)
 	rHashes := make([][]byte, numInvoices)
@@ -1624,9 +1624,10 @@ func (h *HarnessTest) CreatePayReqs(hn *node.HarnessNode,
 		preimage := h.Random32Bytes()
 
 		invoice := &lnrpc.Invoice{
-			Memo:      "testing",
-			RPreimage: preimage,
-			Value:     int64(paymentAmt),
+			Memo:       "testing",
+			RPreimage:  preimage,
+			Value:      int64(paymentAmt),
+			RouteHints: routeHints,
 		}
 		resp := hn.RPC.AddInvoice(invoice)
 

lntest/node/harness_node.go

@@ -876,6 +876,19 @@ func (hn *HarnessNode) RestoreDB() error {
 	return nil
 }
 
+// UpdateGlobalPolicy updates a node's global channel policy.
+func (hn *HarnessNode) UpdateGlobalPolicy(policy *lnrpc.RoutingPolicy) {
+	updateFeeReq := &lnrpc.PolicyUpdateRequest{
+		BaseFeeMsat: policy.FeeBaseMsat,
+		FeeRate: float64(policy.FeeRateMilliMsat) /
+			float64(1_000_000),
+		TimeLockDelta: policy.TimeLockDelta,
+		Scope:         &lnrpc.PolicyUpdateRequest_Global{Global: true},
+		MaxHtlcMsat:   policy.MaxHtlcMsat,
+	}
+	hn.RPC.UpdateChannelPolicy(updateFeeReq)
+}
+
 func postgresDatabaseDsn(dbName string) string {
 	return fmt.Sprintf(postgresDsn, dbName)
 }