Support JSON RPC named parameters

Author: Pedro Branco

src/index.js

@@ -84,6 +84,8 @@ class Client {
         .value();
     }
 
+    this.hasNamedParametersSupport = semver.satisfies(version || '0.14.0', '>=0.14.0');
+
     const request = requestLogger(logger);
 
     this.request = Promise.promisifyAll(request.defaults({
@@ -113,6 +115,11 @@ class Client {
       parameters = _.dropRight(parameters);
     }
 
+    // Support named parameters (Bitcoin Core >=0.14.0 only).
+    if (this.hasNamedParametersSupport && parameters.length === 1 && _.isPlainObject(parameters[0])) {
+      parameters = parameters[0];
+    }
+
     return Promise.try(() => {
       if (Array.isArray(input)) {
         body = input.map((method, index) => this.requester.prepare({ method: method.method, parameters: method.parameters, suffix: index }));

test/index_test.js

@@ -193,6 +193,15 @@ describe('Client', () => {
 
         balance.should.be.a.Number();
       });
+
+      it('should support named parameters', async () => {
+        const balance = await new Client(config.bitcoind).getBalance({
+          account: '*',
+          minconf: 0
+        });
+
+        balance.should.be.a.Number();
+      });
     });
 
     describe('getDifficulty()', () => {
@@ -242,6 +251,16 @@ describe('Client', () => {
 
         transactions.should.be.an.Array().and.empty();
       });
+
+      it('should support named parameters', async () => {
+        let transactions = await new Client(config.bitcoind).listTransactions({ account: 'test' });
+
+        transactions.should.be.an.Array().and.empty();
+
+        transactions = await new Client(config.bitcoind).listTransactions({ account: 'test', count: 15 });
+
+        transactions.should.be.an.Array().and.empty();
+      });
     });
   });