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authorFabio Berger <me@fabioberger.com>2017-11-13 11:17:18 +0800
committerFabio Berger <me@fabioberger.com>2017-11-13 11:17:18 +0800
commitc4ee2d73865a1444c079b9e2836b7630a0adf03e (patch)
treeb9c7794e7022fb189675d914f5fe58dcabd67dec /packages/0x.js/test/utils/rpc.ts
parenta74ec0effa818a86233fe64cb0dad2c61bbb4bb6 (diff)
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Switch over to Lerna + Yarn Workspaces setup for a mono-repo approach
Diffstat (limited to 'packages/0x.js/test/utils/rpc.ts')
-rw-r--r--packages/0x.js/test/utils/rpc.ts57
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diff --git a/packages/0x.js/test/utils/rpc.ts b/packages/0x.js/test/utils/rpc.ts
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+++ b/packages/0x.js/test/utils/rpc.ts
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+import * as ethUtil from 'ethereumjs-util';
+import * as request from 'request-promise-native';
+import {constants} from './constants';
+
+export class RPC {
+ private host: string;
+ private port: number;
+ private id: number;
+ constructor() {
+ this.host = constants.RPC_HOST;
+ this.port = constants.RPC_PORT;
+ this.id = 0;
+ }
+ public async takeSnapshotAsync(): Promise<number> {
+ const method = 'evm_snapshot';
+ const params: any[] = [];
+ const payload = this.toPayload(method, params);
+ const snapshotIdHex = await this.sendAsync(payload);
+ const snapshotId = ethUtil.bufferToInt(ethUtil.toBuffer(snapshotIdHex));
+ return snapshotId;
+ }
+ public async revertSnapshotAsync(snapshotId: number): Promise<boolean> {
+ const method = 'evm_revert';
+ const params = [snapshotId];
+ const payload = this.toPayload(method, params);
+ const didRevert = await this.sendAsync(payload);
+ return didRevert;
+ }
+ public async mineBlockAsync(): Promise<void> {
+ const method = 'evm_mine';
+ const params: any[] = [];
+ const payload = this.toPayload(method, params);
+ await this.sendAsync(payload);
+ }
+ private toPayload(method: string, params: any[] = []): string {
+ const payload = JSON.stringify({
+ id: this.id,
+ method,
+ params,
+ });
+ this.id += 1;
+ return payload;
+ }
+ private async sendAsync(payload: string): Promise<any> {
+ const opts = {
+ method: 'POST',
+ uri: `http://${this.host}:${this.port}`,
+ body: payload,
+ headers: {
+ 'content-type': 'application/json',
+ },
+ };
+ const bodyString = await request(opts);
+ const body = JSON.parse(bodyString);
+ return body.result;
+ }
+}