Merge branch 'development' into feature/addSubproviders

* development: (50 commits)
  Add PR number to changelog
  Address feedback
  Add requestId to subscription messages and update json-schemas
  Remove isomorphic-fetch types from contracts package
  Update README
  Regenerate files
  Make it private
  Change package name
  Update README
  Make fileExtension configurable
  Rename abi-gen to typed-contracts
  Add docs for typed-contracts
  Remove TODOs
  Introduce separate ContextData type and rework it
  Check ABI is defined
  Introduce a const for 'contract.mustache'
  Improve error message
  Reuse util
  Fix a typo
  Introduce a const for 'function'
  ...

# Conflicts:
#	yarn.lock

1 files changed, 43 insertions, 0 deletions

diff --git a/packages/contracts/util/rpc.ts b/packages/contracts/util/rpc.ts
new file mode 100644
index 000000000..023602bd6
--- /dev/null
+++ b/packages/contracts/util/rpc.ts
@@ -0,0 +1,43 @@
+import 'isomorphic-fetch';
+
+import * as truffleConf from '../truffle.js';
+
+export class RPC {
+    private host: string;
+    private port: number;
+    private id: number;
+    constructor() {
+        this.host = truffleConf.networks.development.host;
+        this.port = truffleConf.networks.development.port;
+        this.id = 0;
+    }
+    public async increaseTimeAsync(time: number) {
+        const method = 'evm_increaseTime';
+        const params = [time];
+        const payload = this.toPayload(method, params);
+        return this.sendAsync(payload);
+    }
+    public async mineBlockAsync() {
+        const method = 'evm_mine';
+        const payload = this.toPayload(method);
+        return this.sendAsync(payload);
+    }
+    private toPayload(method: string, params: any[] = []) {
+        const payload = JSON.stringify({
+            id: this.id,
+            method,
+            params,
+        });
+        this.id++;
+        return payload;
+    }
+    private async sendAsync(payload: string): Promise<any> {
+        const opts = {
+            method: 'POST',
+            body: payload,
+        };
+        const response = await fetch(`http://${this.host}:${this.port}`, opts);
+        const responsePayload = await response.json();
+        return responsePayload;
+    }
+}