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* @file proto utils
* @author atom-yang
*/
import * as protobuf from '@aelfqueen/protobufjs';
import * as utils from './utils';
import { transform, OUTPUT_TRANSFORMERS, transformArrayToMap } from './transform';
import coreDescriptor from '../../proto/transaction_fee.proto.json';
import VirtualTransactionDescriptor from '../../proto/virtual_transaction.proto.json';
// We cannot use loadSync because it's not supoort browsers
// https://github.com/protobufjs/protobuf.js/issues/1648
export const coreRootProto = protobuf.Root.fromJSON(coreDescriptor).nested.aelf;
export const { Transaction, Hash, Address, TransactionFeeCharged, ResourceTokenCharged } = coreRootProto;
export const getFee = (base64Str, type = 'TransactionFeeCharged') => {
if (['ResourceTokenCharged', 'TransactionFeeCharged'].indexOf(type) === -1) {
throw new Error('type needs to be one of ResourceTokenCharged and TransactionFeeCharged');
}
const dataType = coreRootProto[type];
let deserialize = dataType.decode(Buffer.from(base64Str, 'base64'));
deserialize = dataType.toObject(deserialize, {
enums: String, // enums as string names
longs: String, // longs as strings (requires long.js)
bytes: String, // bytes as base64 encoded strings
defaults: true, // includes default values
arrays: true, // populates empty arrays (repeated fields) even if defaults=false
objects: true, // populates empty objects (map fields) even if defaults=false
oneofs: true // includes virtual oneof fields set to the present field's name
});
// eslint-disable-next-line max-len
let deserializeLogResult = transform(dataType, deserialize, OUTPUT_TRANSFORMERS);
deserializeLogResult = transformArrayToMap(dataType, deserializeLogResult);
return deserializeLogResult;
};
export const getSerializedDataFromLog = log => {
const { NonIndexed, Indexed = [] } = log;
const serializedData = [...(Indexed || [])];
if (NonIndexed) {
serializedData.push(NonIndexed);
}
return serializedData.join('');
};
export const getResourceFee = (Logs = []) => {
if (!Array.isArray(Logs) || Logs.length === 0) {
return [];
}
return Logs.filter(log => log.Name === 'ResourceTokenCharged').map(v =>
getFee(getSerializedDataFromLog(v), 'ResourceTokenCharged'));
};
export const getTransactionFee = (Logs = []) => {
if (!Array.isArray(Logs) || Logs.length === 0) {
return [];
}
return Logs.filter(log => log.Name === 'TransactionFeeCharged').map(v =>
getFee(getSerializedDataFromLog(v), 'TransactionFeeCharged'));
};
/**
* arrayBuffer To Hex
*
* @alias module:AElf/pbUtils
* @param {Buffer} arrayBuffer arrayBuffer
* @return {string} hex string
*/
export const arrayBufferToHex = arrayBuffer =>
Array.prototype.map.call(new Uint8Array(arrayBuffer), n => `0${n.toString(16)}`.slice(-2)).join('');
/**
* get hex rep From Address
*
* @alias module:AElf/pbUtils
* @param {protobuf} address kernel.Address
* @return {string} hex rep of address
*/
export const getRepForAddress = address => {
const message = Address.fromObject(address);
let hex = '';
if (message.value instanceof Buffer) {
hex = message.value.toString('hex');
} else {
// Uint8Array
hex = arrayBufferToHex(message.value);
}
return utils.encodeAddressRep(hex);
};
/**
* get address From hex rep
*
* @alias module:AElf/pbUtils
* @param {string} rep address
* @return {protobuf} address kernel.Address
*/
export const getAddressFromRep = rep => {
const hex = utils.decodeAddressRep(rep);
return Address.create({
value: Buffer.from(hex.replace('0x', ''), 'hex')
});
};
/**
* get address From hex rep
*
* @alias module:AElf/pbUtils
* @param {string} rep address
* @return {protobuf} address kernel.Address
*/
export const getAddressObjectFromRep = rep => Address.toObject(getAddressFromRep(rep));
/**
* get hex rep From hash
*
* @alias module:AElf/pbUtils
* @param {protobuf} hash kernel.Hash
* @return {string} hex rep
*/
export const getRepForHash = hash => {
const message = Address.fromObject(hash);
let hex = '';
if (message.value instanceof Buffer) {
hex = message.value.toString('hex');
} else {
// Uint8Array
hex = arrayBufferToHex(message.value);
}
return hex;
};
/**
* get Hash From Hex
*
* @alias module:AElf/pbUtils
* @param {string} hex string
* @return {protobuf} kernel.Hash
*/
export const getHashFromHex = hex =>
Hash.create({
value: Buffer.from(hex.replace('0x', ''), 'hex')
});
/**
* get Hash Object From Hex
*
* @alias module:AElf/pbUtils
* @param {string} hex string
* @return {Object} kernel.Hash Hash ot Object
*/
export const getHashObjectFromHex = hex => Hash.toObject(getHashFromHex(hex));
/**
* encode Transaction to protobuf type
*
* @alias module:AElf/pbUtils
* @param {Object} tx object
* @return {protobuf} kernel.Transaction
*/
export const encodeTransaction = tx => Transaction.encode(tx).finish();
/**
* get Transaction
*
* @alias module:AElf/pbUtils
* @param {string} from
* @param {string} to
* @param {string} methodName
* @param {string} params
* @return {protobuf} kernel.Transaction
*/
export const getTransaction = (from, to, methodName, params) => {
const txn = {
from: getAddressFromRep(from),
to: getAddressFromRep(to),
methodName,
params
};
return Transaction.create(txn);
};
const deserializeIndexedAndNonIndexed = (serializedData, dataType) => {
let deserializeLogResult = serializedData.reduce((acc, v) => {
let deserialize = dataType.decode(Buffer.from(v, 'base64'));
deserialize = dataType.toObject(deserialize, {
enums: String, // enums as string names
longs: String, // longs as strings (requires long.js)
bytes: String, // bytes as base64 encoded strings
defaults: false, // includes default values
arrays: true, // populates empty arrays (repeated fields) even if defaults=false
objects: true, // populates empty objects (map fields) even if defaults=false
oneofs: true // includes virtual oneof fields set to the present field's name
});
return {
...acc,
...deserialize
};
}, {});
// eslint-disable-next-line max-len
deserializeLogResult = transform(dataType, deserializeLogResult, OUTPUT_TRANSFORMERS);
deserializeLogResult = transformArrayToMap(dataType, deserializeLogResult);
return deserializeLogResult;
};
const deserializeWithServicesAndRoot = (logs, services, Root) => {
// filter by address and name
if (logs.length === 0) {
return [];
}
const results = logs.map(item => {
const { Name, NonIndexed, Indexed } = item;
let dataType;
// eslint-disable-next-line no-restricted-syntax
for (const service of services) {
try {
dataType = service.lookupType(Name);
break;
} catch (e) {}
}
const serializedData = [...(Indexed || [])];
if (NonIndexed) {
serializedData.push(NonIndexed);
}
if (Name === 'VirtualTransactionCreated') {
// VirtualTransactionCreated is system-default
try {
dataType = Root.VirtualTransactionCreated;
return deserializeIndexedAndNonIndexed(serializedData, dataType);
} catch (e) {
// if normal contract has a method called VirtualTransactionCreated
return deserializeIndexedAndNonIndexed(serializedData, dataType);
}
} else {
// if dataType cannot be found and also is not VirtualTransactionCreated
if (!dataType) {
return {
message: 'This log is not supported.'
};
}
// other method
return deserializeIndexedAndNonIndexed(serializedData, dataType);
}
});
return results;
};
/**
* deserialize logs
*
* @alias module:AElf/pbUtils
* @param {array} logs array of log which enclude Address,Name,Indexed and NonIndexed.
* @param {array} services array of service which got from getContractFileDescriptorSet
* @return {array} deserializeLogResult
*/
export const deserializeLog = (logs = [], services) => {
const Root = protobuf.Root.fromJSON(VirtualTransactionDescriptor);
return deserializeWithServicesAndRoot(logs, services, Root);
};
/* eslint-enable */
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