339 lines
13 KiB
TypeScript
339 lines
13 KiB
TypeScript
|
|
import { BaseProvider } from './base-provider';
|
|
|
|
import { hexlify, hexStripZeros } from '../utils/bytes';
|
|
import { defineReadOnly } from '../utils/properties';
|
|
import { fetchJson } from '../utils/web';
|
|
|
|
import * as errors from '../errors';
|
|
|
|
///////////////////////////////
|
|
// Imported Types
|
|
|
|
import { BlockTag, TransactionRequest, TransactionResponse } from './abstract-provider';
|
|
|
|
import { Networkish } from '../utils/networks';
|
|
|
|
///////////////////////////////
|
|
|
|
// The transaction has already been sanitized by the calls in Provider
|
|
function getTransactionString(transaction: TransactionRequest): string {
|
|
var result = [];
|
|
for (var key in transaction) {
|
|
if ((<any>transaction)[key] == null) { continue; }
|
|
var value = hexlify((<any>transaction)[key]);
|
|
if ((<any>{ gasLimit: true, gasPrice: true, nonce: true, value: true })[key]) {
|
|
value = hexStripZeros(value);
|
|
}
|
|
result.push(key + '=' + value);
|
|
}
|
|
return result.join('&');
|
|
}
|
|
|
|
function getResult(result: { status?: number, message?: string, result?: any }): any {
|
|
// getLogs, getHistory have weird success responses
|
|
if (result.status == 0 && (result.message === 'No records found' || result.message === 'No transactions found')) {
|
|
return result.result;
|
|
}
|
|
|
|
if (result.status != 1 || result.message != 'OK') {
|
|
// @TODO: not any
|
|
var error: any = new Error('invalid response');
|
|
error.result = JSON.stringify(result);
|
|
throw error;
|
|
}
|
|
|
|
return result.result;
|
|
}
|
|
|
|
function getJsonResult(result: { jsonrpc: string, result?: any, error?: { code?: number, data?: any, message?: string} } ): any {
|
|
if (result.jsonrpc != '2.0') {
|
|
// @TODO: not any
|
|
let error: any = new Error('invalid response');
|
|
error.result = JSON.stringify(result);
|
|
throw error;
|
|
}
|
|
|
|
if (result.error) {
|
|
// @TODO: not any
|
|
let error: any = new Error(result.error.message || 'unknown error');
|
|
if (result.error.code) { error.code = result.error.code; }
|
|
if (result.error.data) { error.data = result.error.data; }
|
|
throw error;
|
|
}
|
|
|
|
return result.result;
|
|
}
|
|
|
|
// The blockTag was normalized as a string by the Provider pre-perform operations
|
|
function checkLogTag(blockTag: string): number | "latest" {
|
|
if (blockTag === 'pending') { throw new Error('pending not supported'); }
|
|
if (blockTag === 'latest') { return blockTag; }
|
|
|
|
return parseInt(blockTag.substring(2), 16);
|
|
}
|
|
|
|
|
|
export class EtherscanProvider extends BaseProvider{
|
|
readonly baseUrl: string;
|
|
readonly apiKey: string;
|
|
constructor(network?: Networkish, apiKey?: string) {
|
|
super(network);
|
|
errors.checkNew(this, EtherscanProvider);
|
|
|
|
let name = 'invalid';
|
|
if (this.network) { name = this.network.name; }
|
|
|
|
let baseUrl = null;
|
|
switch(name) {
|
|
case 'homestead':
|
|
baseUrl = 'https://api.etherscan.io';
|
|
break;
|
|
case 'ropsten':
|
|
baseUrl = 'https://api-ropsten.etherscan.io';
|
|
break;
|
|
case 'rinkeby':
|
|
baseUrl = 'https://api-rinkeby.etherscan.io';
|
|
break;
|
|
case 'kovan':
|
|
baseUrl = 'https://api-kovan.etherscan.io';
|
|
break;
|
|
default:
|
|
throw new Error('unsupported network');
|
|
}
|
|
|
|
defineReadOnly(this, 'baseUrl', baseUrl);
|
|
defineReadOnly(this, 'apiKey', apiKey);
|
|
}
|
|
|
|
|
|
perform(method: string, params: any) {
|
|
let url = this.baseUrl;
|
|
|
|
let apiKey = '';
|
|
if (this.apiKey) { apiKey += '&apikey=' + this.apiKey; }
|
|
|
|
let get = (url: string, procFunc?: (value: any) => any) => {
|
|
return fetchJson(url, null, procFunc || getJsonResult).then((result) => {
|
|
this.emit('debug', {
|
|
action: 'perform',
|
|
request: url,
|
|
response: result,
|
|
provider: this
|
|
});
|
|
return result;
|
|
});
|
|
};
|
|
|
|
switch (method) {
|
|
case 'getBlockNumber':
|
|
url += '/api?module=proxy&action=eth_blockNumber' + apiKey;
|
|
return get(url);
|
|
|
|
case 'getGasPrice':
|
|
url += '/api?module=proxy&action=eth_gasPrice' + apiKey;
|
|
return get(url);
|
|
|
|
case 'getBalance':
|
|
// Returns base-10 result
|
|
url += '/api?module=account&action=balance&address=' + params.address;
|
|
url += '&tag=' + params.blockTag + apiKey;
|
|
return get(url, getResult);
|
|
|
|
case 'getTransactionCount':
|
|
url += '/api?module=proxy&action=eth_getTransactionCount&address=' + params.address;
|
|
url += '&tag=' + params.blockTag + apiKey;
|
|
return get(url);
|
|
|
|
|
|
case 'getCode':
|
|
url += '/api?module=proxy&action=eth_getCode&address=' + params.address;
|
|
url += '&tag=' + params.blockTag + apiKey;
|
|
return get(url, getJsonResult);
|
|
|
|
case 'getStorageAt':
|
|
url += '/api?module=proxy&action=eth_getStorageAt&address=' + params.address;
|
|
url += '&position=' + params.position;
|
|
url += '&tag=' + params.blockTag + apiKey;
|
|
return get(url, getJsonResult);
|
|
|
|
|
|
case 'sendTransaction':
|
|
url += '/api?module=proxy&action=eth_sendRawTransaction&hex=' + params.signedTransaction;
|
|
url += apiKey;
|
|
return get(url).catch((error) => {
|
|
if (error.responseText) {
|
|
// "Insufficient funds. The account you tried to send transaction from does not have enough funds. Required 21464000000000 and got: 0"
|
|
if (error.responseText.toLowerCase().indexOf('insufficient funds') >= 0) {
|
|
errors.throwError('insufficient funds', errors.INSUFFICIENT_FUNDS, { });
|
|
}
|
|
// "Transaction with the same hash was already imported."
|
|
if (error.responseText.indexOf('same hash was already imported') >= 0) {
|
|
errors.throwError('nonce has already been used', errors.NONCE_EXPIRED, { });
|
|
}
|
|
// "Transaction gas price is too low. There is another transaction with same nonce in the queue. Try increasing the gas price or incrementing the nonce."
|
|
if (error.responseText.indexOf('another transaction with same nonce') >= 0) {
|
|
errors.throwError('replacement fee too low', errors.REPLACEMENT_UNDERPRICED, { });
|
|
}
|
|
}
|
|
throw error;
|
|
});
|
|
|
|
case 'getBlock':
|
|
if (params.blockTag) {
|
|
url += '/api?module=proxy&action=eth_getBlockByNumber&tag=' + params.blockTag;
|
|
if (params.includeTransactions) {
|
|
url += '&boolean=true';
|
|
} else {
|
|
url += '&boolean=false';
|
|
}
|
|
url += apiKey;
|
|
return get(url);
|
|
}
|
|
throw new Error('getBlock by blockHash not implmeneted');
|
|
|
|
case 'getTransaction':
|
|
url += '/api?module=proxy&action=eth_getTransactionByHash&txhash=' + params.transactionHash;
|
|
url += apiKey;
|
|
return get(url);
|
|
|
|
case 'getTransactionReceipt':
|
|
url += '/api?module=proxy&action=eth_getTransactionReceipt&txhash=' + params.transactionHash;
|
|
url += apiKey;
|
|
return get(url);
|
|
|
|
|
|
case 'call': {
|
|
let transaction = getTransactionString(params.transaction);
|
|
if (transaction) { transaction = '&' + transaction; }
|
|
url += '/api?module=proxy&action=eth_call' + transaction;
|
|
//url += '&tag=' + params.blockTag + apiKey;
|
|
if (params.blockTag !== 'latest') {
|
|
throw new Error('EtherscanProvider does not support blockTag for call');
|
|
}
|
|
url += apiKey;
|
|
return get(url);
|
|
}
|
|
|
|
case 'estimateGas': {
|
|
let transaction = getTransactionString(params.transaction);
|
|
if (transaction) { transaction = '&' + transaction; }
|
|
url += '/api?module=proxy&action=eth_estimateGas&' + transaction;
|
|
url += apiKey;
|
|
return get(url);
|
|
}
|
|
|
|
case 'getLogs':
|
|
url += '/api?module=logs&action=getLogs';
|
|
try {
|
|
if (params.filter.fromBlock) {
|
|
url += '&fromBlock=' + checkLogTag(params.filter.fromBlock);
|
|
}
|
|
|
|
if (params.filter.toBlock) {
|
|
url += '&toBlock=' + checkLogTag(params.filter.toBlock);
|
|
}
|
|
|
|
if (params.filter.address) {
|
|
url += '&address=' + params.filter.address;
|
|
}
|
|
|
|
// @TODO: We can handle slightly more complicated logs using the logs API
|
|
if (params.filter.topics && params.filter.topics.length > 0) {
|
|
if (params.filter.topics.length > 1) {
|
|
throw new Error('unsupported topic format');
|
|
}
|
|
let topic0 = params.filter.topics[0];
|
|
if (typeof(topic0) !== 'string' || topic0.length !== 66) {
|
|
throw new Error('unsupported topic0 format');
|
|
}
|
|
url += '&topic0=' + topic0;
|
|
}
|
|
} catch (error) {
|
|
return Promise.reject(error);
|
|
}
|
|
|
|
url += apiKey;
|
|
|
|
var self = this;
|
|
return get(url, getResult).then(function(logs: Array<any>) {
|
|
var txs: { [hash: string]: string } = {};
|
|
|
|
var seq = Promise.resolve();
|
|
logs.forEach(function(log) {
|
|
seq = seq.then(function() {
|
|
if (log.blockHash != null) { return null; }
|
|
log.blockHash = txs[log.transactionHash];
|
|
if (log.blockHash == null) {
|
|
return self.getTransaction(log.transactionHash).then(function(tx) {
|
|
txs[log.transactionHash] = tx.blockHash;
|
|
log.blockHash = tx.blockHash;
|
|
return null;
|
|
});
|
|
}
|
|
return null;
|
|
});
|
|
});
|
|
|
|
return seq.then(function() {
|
|
return logs;
|
|
});
|
|
});
|
|
|
|
case 'getEtherPrice':
|
|
if (this.network.name !== 'homestead') { return Promise.resolve(0.0); }
|
|
url += '/api?module=stats&action=ethprice';
|
|
url += apiKey;
|
|
return get(url, getResult).then(function(result) {
|
|
return parseFloat(result.ethusd);
|
|
});
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return super.perform(method, params);
|
|
}
|
|
|
|
// @TODO: Allow startBlock and endBlock to be Promises
|
|
getHistory(addressOrName: string | Promise<string>, startBlock?: BlockTag, endBlock?: BlockTag): Promise<Array<TransactionResponse>> {
|
|
|
|
let url = this.baseUrl;
|
|
|
|
let apiKey = '';
|
|
if (this.apiKey) { apiKey += '&apikey=' + this.apiKey; }
|
|
|
|
if (startBlock == null) { startBlock = 0; }
|
|
if (endBlock == null) { endBlock = 99999999; }
|
|
|
|
return this.resolveName(addressOrName).then((address) => {
|
|
url += '/api?module=account&action=txlist&address=' + address;
|
|
url += '&startblock=' + startBlock;
|
|
url += '&endblock=' + endBlock;
|
|
url += '&sort=asc' + apiKey;
|
|
|
|
return fetchJson(url, null, getResult).then((result: Array<any>) => {
|
|
this.emit('debug', {
|
|
action: 'getHistory',
|
|
request: url,
|
|
response: result,
|
|
provider: this
|
|
});
|
|
var output: Array<TransactionResponse> = [];
|
|
result.forEach((tx) => {
|
|
['contractAddress', 'to'].forEach(function(key) {
|
|
if (tx[key] == '') { delete tx[key]; }
|
|
});
|
|
if (tx.creates == null && tx.contractAddress != null) {
|
|
tx.creates = tx.contractAddress;
|
|
}
|
|
let item = BaseProvider.checkTransactionResponse(tx);
|
|
if (tx.timeStamp) { item.timestamp = parseInt(tx.timeStamp); }
|
|
output.push(item);
|
|
});
|
|
return output;
|
|
});
|
|
});
|
|
}
|
|
}
|