Merge pull request #32 from nguyenphuminh/rpc-changes

Update RPC server

Author: nguyenphuminh

JSON-RPC.md

@@ -21,6 +21,10 @@ JSON-RPC APIs are APIs provided by running a JeChain RPC server. They can be use
     * Use case: Get hash and nonce from the latest block.
     * Reply body: `{ success: true, payload: { hash: <hash>, nonce: <nonce> } }`
 
+* `/mining`:
+    * Use case: Check on whether client is mining or not.
+    * Reply body: `{ success: true, payload: { mining: true | false } }`
+
 ### POST
 
 * `/get_blockByHash`:
@@ -89,6 +93,15 @@ JSON-RPC APIs are APIs provided by running a JeChain RPC server. They can be use
             * Status: 400
             * Body: `{ success: false, payload: null, error: { message: "Invalid request." } }`
 
+* `/get_storage`:
+    * Use case: Get the storage object from address.
+    * Request body: `{ params: { address: <address> } }`
+    * Reply body: `{ success: true, payload: { storage: <storage_object> } }`
+    * Error body:
+        * Invalid request (not enough params):
+            * Status: 400
+            * Body: `{ success: false, payload: null, error: { message: "Invalid request." } }`
+
 * `/sendTransaction`:
     * Use case: Send transaction.
     * Request body: `{ params: { transaction: <transaction_object> } }`

src/rpc/rpc.js

@@ -48,6 +48,11 @@ function rpc(PORT, client, transactionHandler, stateDB, blockDB) {
 
                 break;
 
+            case "mining":
+                respond({ mining: client.mining });
+                
+                break;
+            
             default:
                 throwError("Invalid option.", 404);
         }
@@ -158,7 +163,7 @@ function rpc(PORT, client, transactionHandler, stateDB, blockDB) {
                     throwError("Invalid request.", 400);
                 } else {
                     const dataFromTarget = await stateDB.get(req.body.params.address); // Fetch target's state object
-                    const targetBalance = dataFromTarget.balance;                    // Get target's balance
+                    const targetBalance = dataFromTarget.balance;                      // Get target's balance
 
                     respond({ balance: targetBalance });
                 }
@@ -169,18 +174,34 @@ function rpc(PORT, client, transactionHandler, stateDB, blockDB) {
                 if (
                     typeof req.body.params !== "object"            ||
                     typeof req.body.params.address !== "string"    ||
-                    !(await stateDB.keys().all()).includes(tx.sender)
+                    !(await stateDB.keys().all()).includes(req.body.params.address)
                 ) {
                     throwError("Invalid request.", 400);
                 } else {
-                    const dataFromTarget = await stateDB.get(tx.sender); // Fetch target's state object
-                    const targetBody = dataFromTarget.body;                          // Get target's code body
+                    const dataFromTarget = await stateDB.get(req.body.params.address); // Fetch target's state object
+                    const targetBody = dataFromTarget.body;                            // Get target's code body
 
                     respond({ code: targetBody });
                 }
 
                 break;
 
+            case "get_storage":
+                if (
+                    typeof req.body.params !== "object"            ||
+                    typeof req.body.params.address !== "string"    ||
+                    !(await stateDB.keys().all()).includes(req.body.params.address)
+                ) {
+                    throwError("Invalid request.", 400);
+                } else {
+                    const dataFromTarget = await stateDB.get(req.body.params.address); // Fetch target's state object
+                    const targetStorage = dataFromTarget.body;                            // Get target's storage object
+
+                    respond({ storage: targetStorage });
+                }
+                
+                break;
+            
             case "get_transactionByBlockNumberAndIndex":
                 if (
                     typeof req.body.params !== "object" ||