@celo/connect
Version:
Light Toolkit for connecting with the Celo network
119 lines • 4.61 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.HttpRpcCaller = exports.getRandomId = exports.rpcCallHandler = void 0;
const debug_1 = __importDefault(require("debug"));
const debugRpcPayload = (0, debug_1.default)('rpc:payload');
const debugRpcResponse = (0, debug_1.default)('rpc:response');
const debugRpcCallback = (0, debug_1.default)('rpc:callback:exception');
function rpcCallHandler(payload, handler, callback) {
try {
handler(payload)
.then((result) => {
callback(null, toRPCResponse(payload, result));
},
// Called if the Promise of the 'handler' fails
(error) => {
callback(error, toRPCResponse(payload, null, error));
})
.catch((error) => {
// Called if the 'callback' fails
debugRpcCallback('Callback for handling the JsonRpcResponse fails');
debugRpcCallback('%O', error);
});
}
catch (error) {
// Called if the handler fails before making the promise
callback(error instanceof Error ? error : null);
}
}
exports.rpcCallHandler = rpcCallHandler;
// Ported from: https://github.com/MetaMask/provider-engine/blob/master/util/random-id.js
function getRandomId() {
const extraDigits = 3;
const baseTen = 10;
// 13 time digits
const datePart = new Date().getTime() * Math.pow(baseTen, extraDigits);
// 3 random digits
const extraPart = Math.floor(Math.random() * Math.pow(baseTen, extraDigits));
// 16 digits
return datePart + extraPart;
}
exports.getRandomId = getRandomId;
function toRPCResponse(payload, result, error) {
const response = {
id: Number(payload.id),
jsonrpc: payload.jsonrpc,
result,
};
if (error != null) {
response.error = {
message: error.message || error.toString(),
code: -32000,
};
}
return response;
}
class HttpRpcCaller {
constructor(httpProvider, jsonrpcVersion = '2.0') {
this.httpProvider = httpProvider;
this.jsonrpcVersion = jsonrpcVersion;
}
call(method, params) {
return __awaiter(this, void 0, void 0, function* () {
return new Promise((resolve, reject) => {
const payload = {
id: getRandomId(),
jsonrpc: this.jsonrpcVersion,
method,
params,
};
this.send(payload, (err, response) => {
if (err != null || !response) {
reject(err);
}
else {
resolve(response);
}
});
});
});
}
send(payload, callback) {
debugRpcPayload('%O', payload);
const decoratedCallback = (error, result) => {
let err = null;
// error could be false
if (error) {
err = error;
}
debugRpcResponse('%O', result);
// The provider send call will not provide an error to the callback if
// the result itself specifies an error. Here, we extract the error in the
// result.
if (result &&
result.error != null &&
typeof result.error !== 'string' &&
result.error.message != null) {
err = new Error(result.error.message);
}
callback(err, result);
};
if (this.httpProvider && typeof this.httpProvider !== 'string') {
this.httpProvider.send(payload, decoratedCallback);
}
}
}
exports.HttpRpcCaller = HttpRpcCaller;
//# sourceMappingURL=rpc-caller.js.map