itest: add test for walletrpc.EstimateFee

Make sure conf_target=1 is accepted, but conf_target=0 is not.

Author: starius

itest/list_on_test.go

@@ -723,6 +723,10 @@ var allTestCases = []*lntest.TestCase{
 		Name:     "grpc not found",
 		TestFunc: testGRPCNotFound,
 	},
+	{
+		Name:     "estimate fee",
+		TestFunc: testEstimateFee,
+	},
 }
 
 // appendPrefixed is used to add a prefix to each test name in the subtests

itest/lnd_misc_test.go

@@ -1,6 +1,7 @@
 package itest
 
 import (
+	"context"
 	"encoding/hex"
 	"fmt"
 	"os"
@@ -1391,3 +1392,25 @@ func testGRPCNotFound(ht *lntest.HarnessTest) {
 		RHash: rHash,
 	}, notFoundErr)
 }
+
+// testEstimateFee tests walletrpc.EstimateFee API.
+func testEstimateFee(ht *lntest.HarnessTest) {
+	alice := ht.NewNode("Alice", nil)
+
+	ctx := context.Background()
+
+	// Make sure it passes with conf_target=1.
+	req := &walletrpc.EstimateFeeRequest{
+		ConfTarget: 1,
+	}
+	resp, err := alice.RPC.WalletKit.EstimateFee(ctx, req)
+	require.NoError(ht, err)
+	require.NotZero(ht, resp.SatPerKw)
+	require.NotZero(ht, resp.MinRelayFeeSatPerKw)
+
+	// Make sure it fails with conf_target=0.
+	req.ConfTarget = 0
+	_, err = alice.RPC.WalletKit.EstimateFee(ctx, req)
+	require.ErrorContains(ht, err, "confirmation target must be greater "+
+		"than 0")
+}