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-rw-r--r--packages/contracts/util/rpc.ts43
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;
+ }
+}