rpc: add gettx command to walletrpc

cmd/lncli/commands.go

@@ -1853,9 +1853,9 @@ var listChainTxnsCommand = cli.Command{
 		cli.Int64Flag{
 			Name: "end_height",
 			Usage: "the block height until which to list " +
-				"transactions, inclusive, to get transactions " +
-				"until the chain tip, including unconfirmed, " +
-				"set this value to -1",
+				"transactions, inclusive, to get " +
+				"transactions until the chain tip, including " +
+				"unconfirmed, set this value to -1",
 		},
 	},
 	Description: `

cmd/lncli/walletrpc_active.go

@@ -74,6 +74,7 @@ func walletCommands() []cli.Command {
 				listSweepsCommand,
 				labelTxCommand,
 				publishTxCommand,
+				getTxCommand,
 				releaseOutputCommand,
 				leaseOutputCommand,
 				listLeasesCommand,
@@ -561,6 +562,43 @@ func publishTransaction(ctx *cli.Context) error {
 	return nil
 }
 
+var getTxCommand = cli.Command{
+	Name:      "gettx",
+	Usage:     "Returns details of a transaction.",
+	ArgsUsage: "txid",
+	Description: `
+	Query the transaction using the given transaction id and return its 
+	details. An error is returned if the transaction is not found.
+	`,
+	Action: actionDecorator(getTransaction),
+}
+
+func getTransaction(ctx *cli.Context) error {
+	ctxc := getContext()
+
+	// Display the command's help message if we do not have the expected
+	// number of arguments/flags.
+	if ctx.NArg() != 1 {
+		return cli.ShowCommandHelp(ctx, "gettx")
+	}
+
+	walletClient, cleanUp := getWalletClient(ctx)
+	defer cleanUp()
+
+	req := &walletrpc.GetTransactionRequest{
+		Txid: ctx.Args().First(),
+	}
+
+	res, err := walletClient.GetTransaction(ctxc, req)
+	if err != nil {
+		return err
+	}
+
+	printRespJSON(res)
+
+	return nil
+}
+
 // utxoLease contains JSON annotations for a lease on an unspent output.
 type utxoLease struct {
 	ID         string   `json:"id"`

docs/release-notes/release-notes-0.18.0.md

@@ -77,6 +77,9 @@
   status, `StatusInitiated`, to explicitly report its current state. Before
   running this new version, please make sure to upgrade your client application
   to include this new status so it can understand the RPC response properly.
+
+* Adds a new rpc endpoint gettx to the walletrpc sub-server to [fetch 
+  transaction details](https://github.com/lightningnetwork/lnd/pull/7654).
 
 ## lncli Additions
 
@@ -175,6 +178,7 @@
 * Andras Banki-Horvath
 * Carla Kirk-Cohen
 * Elle Mouton
+* ErikEk
 * Keagan McClelland
 * Marcos Fernandez Perez
 * Matt Morehouse

itest/lnd_misc_test.go

@@ -829,32 +829,22 @@ func testSweepAllCoins(ht *lntest.HarnessTest) {
 	// assertTxLabel is a helper function which finds a target tx in our
 	// set of transactions and checks that it has the desired label.
 	assertTxLabel := func(targetTx, label string) error {
-		// List all transactions relevant to our wallet, and find the
-		// tx so that we can check the correct label has been set.
-		txResp := ainz.RPC.GetTransactions(nil)
-
-		var target *lnrpc.Transaction
-
-		// First we need to find the target tx.
-		for _, txn := range txResp.Transactions {
-			if txn.TxHash == targetTx {
-				target = txn
-				break
-			}
-		}
-
-		// If we cannot find it, return an error.
-		if target == nil {
-			return fmt.Errorf("target tx %v not found", targetTx)
-		}
+		// Get the transaction from our wallet so that we can check
+		// that the correct label has been set.
+		txResp := ainz.RPC.GetTransaction(
+			&walletrpc.GetTransactionRequest{
+				Txid: targetTx,
+			},
+		)
+		require.NotNilf(ht, txResp, "target tx %v not found", targetTx)
 
-		// Otherwise, check the labels are matched.
-		if target.Label == label {
+		// Make sure the labels match.
+		if txResp.Label == label {
 			return nil
 		}
 
 		return fmt.Errorf("labels not match, want: "+
-			"%v, got %v", label, target.Label)
+			"%v, got %v", label, txResp.Label)
 	}
 
 	// waitTxLabel waits until the desired tx label is found or timeout.