Merge PR #3523: Add tx/encode endpoint and CLI command

client/lcd/lcd_test.go

@@ -1,6 +1,7 @@
 package lcd
 
 import (
+	"encoding/base64"
 	"encoding/hex"
 	"fmt"
 	"net/http"
@@ -423,6 +424,46 @@ func TestCoinSendGenerateSignAndBroadcast(t *testing.T) {
 	require.Equal(t, gasEstimate, resultTx.GasWanted)
 }
 
+func TestEncodeTx(t *testing.T) {
+	// Setup
+	kb, err := keys.NewKeyBaseFromDir(InitClientHome(t, ""))
+	require.NoError(t, err)
+	addr, seed := CreateAddr(t, name1, pw, kb)
+	cleanup, _, _, port := InitializeTestLCD(t, 1, []sdk.AccAddress{addr}, true)
+	defer cleanup()
+
+	// Make a transaction to test with
+	res, body, _ := doTransferWithGas(t, port, seed, name1, memo, "", addr, "2", 1, false, true, fees)
+	var tx auth.StdTx
+	cdc.UnmarshalJSON([]byte(body), &tx)
+
+	// Build the request
+	encodeReq := struct {
+		Tx auth.StdTx `json:"tx"`
+	}{Tx: tx}
+	encodedJSON, _ := cdc.MarshalJSON(encodeReq)
+	res, body = Request(t, port, "POST", "/tx/encode", encodedJSON)
+
+	// Make sure it came back ok, and that we can decode it back to the transaction
+	// 200 response
+	require.Equal(t, http.StatusOK, res.StatusCode, body)
+	encodeResp := struct {
+		Tx string `json:"tx"`
+	}{}
+
+	// No error decoding the JSON
+	require.Nil(t, cdc.UnmarshalJSON([]byte(body), &encodeResp))
+
+	// Check that the base64 decodes
+	decodedBytes, err := base64.StdEncoding.DecodeString(encodeResp.Tx)
+	require.Nil(t, err)
+
+	// Check that the transaction decodes as expected
+	var decodedTx auth.StdTx
+	require.Nil(t, cdc.UnmarshalBinaryLengthPrefixed(decodedBytes, &decodedTx))
+	require.Equal(t, memo, decodedTx.Memo)
+}
+
 func TestTxs(t *testing.T) {
 	kb, err := keys.NewKeyBaseFromDir(InitClientHome(t, ""))
 	require.NoError(t, err)

client/lcd/swagger-ui/swagger.yaml

@@ -334,6 +334,39 @@ paths:
           description: The Tx was malformated
         500:
           description: Server internal error
+  /tx/encode:
+    post:
+      tags:
+        - ICS20
+      summary: Encode a transaction to wire format
+      description: Encode a transaction (signed or not) from JSON to base64-encoded Amino serialized bytes
+      consumes:
+        - application/json
+      produces:
+        - application/json
+      parameters:
+        - in: body
+          name: tx
+          description: The transaction to encode
+          required: true
+          schema:
+            type: object
+            properties:
+              tx:
+                $ref: "#/definitions/StdTx"
+      responses:
+        200:
+          description: Transaction was successfully decoded and re-encoded
+          schema:
+            type: object
+            properties:
+              tx:
+                type: string
+                example: The base64-encoded Amino-serialized bytes for the transaction
+        400:
+          description: The Tx was malformated
+        500:
+          description: Server internal error
   /bank/balances/{address}:
     get:
       summary: Get the account balances