Press n or j to go to the next uncovered block, b, p or k for the previous block.
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* @file chain
* @author atom-yang
*/
import { isBoolean, isFunction, noop, setPath } from '../util/utils';
import { CHAIN_METHODS } from '../common/constants';
import ChainMethod from './chainMethod';
import * as merkleTree from '../util/merkleTree';
import ContractFactory from '../contract';
export default class Chain {
constructor(requestManager) {
Object.keys(CHAIN_METHODS).forEach(key => {
const methodConfig = CHAIN_METHODS[key];
const { name } = methodConfig;
const method = new ChainMethod(methodConfig);
method.setRequestManager(requestManager);
setPath(this, name, method.run);
});
}
extractArgumentsIntoObject(args) {
const result = {
callback: noop,
isSync: false,
refBlockNumberStrategy: 0
};
if (args.length === 0) {
// has no callback, default to be async mode
return result;
}
if (isFunction(args[args.length - 1])) {
result.callback = args[args.length - 1];
}
args.forEach(arg => {
if (isBoolean(arg?.sync)) {
result.isSync = arg.sync;
}
if (typeof arg?.refBlockNumberStrategy === 'number') {
result.refBlockNumberStrategy = arg.refBlockNumberStrategy;
}
});
return result;
}
/**
* @param {string} address - Contract address
* @param {IBlockchainWallet} wallet - aelf wallet
* @param {object} options - {sync: boolean, refBlockNumberStrategy: number}
* @param {...any} args
* @returns
*/
contractAt(address, wallet, ...args) {
const { callback, isSync, refBlockNumberStrategy } = this.extractArgumentsIntoObject(args);
if (isSync) {
const fds = this.getContractFileDescriptorSet(address, {
sync: true
});
if (fds && fds.file && fds.file.length > 0) {
const factory = new ContractFactory(this, fds, wallet, { refBlockNumberStrategy });
return factory.at(address);
}
throw new Error('no such contract');
}
// eslint-disable-next-line consistent-return
return this.getContractFileDescriptorSet(address).then(fds => {
if (fds && fds.file && fds.file.length > 0) {
const factory = new ContractFactory(this, fds, wallet, { refBlockNumberStrategy });
const result = factory.at(address);
callback(null, result);
return result;
}
callback(new Error('no such contract'));
// if callback is noop, throw error
if (callback.length === 0) {
throw new Error('no such contract');
}
});
}
getMerklePath(txId, height, ...args) {
const { isSync } = this.extractArgumentsIntoObject(args);
if (isSync) {
const block = this.getBlockByHeight(height, true, {
sync: true
});
const { BlockHash, Body } = block;
const txIds = Body.Transactions;
const txIndex = txIds.findIndex(id => id === txId);
if (txIndex === -1) {
throw new Error(`txId ${txId} has no correspond transaction in the block with height ${height}`);
}
const txResults = this.getTxResults(BlockHash, 0, txIds.length, {
sync: true
});
const nodes = txResults.map((result, index) => {
const id = txIds[index];
const status = result.Status;
const buffer = Buffer.concat([Buffer.from(id.replace('0x', ''), 'hex'), Buffer.from(status, 'utf8')]);
return merkleTree.node(buffer);
});
return merkleTree.getMerklePath(txIndex, nodes);
}
return this.getBlockByHeight(height, true).then(block => {
const { BlockHash, Body } = block;
const txIds = Body.Transactions;
const txIndex = txIds.findIndex(id => id === txId);
if (txIndex === -1) {
throw new Error(`txId ${txId} has no correspond transaction in the block with height ${height}`);
}
return this.getTxResults(BlockHash, 0, txIds.length).then(results => {
const nodes = results.map((result, index) => {
const id = txIds[index];
const status = result.Status;
const buffer = Buffer.concat([Buffer.from(id.replace('0x', ''), 'hex'), Buffer.from(status, 'utf8')]);
return merkleTree.node(buffer);
});
return merkleTree.getMerklePath(txIndex, nodes);
});
});
}
}
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