/**
* Provides utility functions
* @module stayge-wallet/icon-js/utils
*/
'use strict'
const BigNumber = require('bignumber.js');
const config = require('./config.js');
module.exports = {
/**
* Returns true if object is string, otherwise false
* @param {Object} object
* @return {Boolean}
*/
isString(object) {
return typeof object === 'string' ||
(object &&
object.constructor &&
object.constructor.name === 'String');
},
/**
* Returns true if object is BigNumber, otherwise false
* @param {Object}
* @return {Boolean}
*/
isBigNumber(object) {
return (object && (object instanceof BigNumber || (object.constructor && object.constructor.name === 'BigNumber')));
},
/**
* Transforms into an bignumber
* @param {Number|String|BigNumber} a number, string, HEX string or BigNumber
* @return {BigNumber} BigNumber
*/
toBigNumber(number) {
number = number || 0;
if (this.isBigNumber(number))
return number;
if (this.isString(number) &&
(number.indexOf('0x') === 0 || number.indexOf('-0x') === 0)) {
return new BigNumber(number.replace('0x',''), 16);
}
return new BigNumber(number.toString(10), 10);
},
/**
* Convert to icx unit
* @param {Number|String|BigNumber} a number, string, HEX string or BigNumber
* @return {String}
*/
convertToIcx(value) {
return this.toBigNumber(value)
.dividedBy(config.unitIcx)
.toString(10);
},
/**
* Convert to loop unit
* @param {Number|String|BigNumber} value
* @return {BigNumber}
*/
convertToLoop(value) {
return this.toBigNumber(value).times(config.unitIcx);
},
/**
* Convert a number to hexadecimal string
* @param {Number|String|BigNumber} value
* @return {String}
*/
toHexString(value) {
if (typeof value === 'number') {
return value < 0 ? '-0x' + value.toString(16).substr(1) : '0x' + value.toString(16);
} else if (typeof value === 'string' && !value.startsWith('0x')) {
return '0x' + value.toString(16);
} else if (this.isBigNumber(value)) {
return value < 0 ? '-0x' + value.toString(16).substr(1) : '0x' + value.toString(16);
} else {
return value;
}
},
/**
* Convert to hash string leading '0x'
* @param {String} value
* @return {String}
*/
toHashString(value) {
return value.substring(0, 2) === '0x' ? value : '0x' + value;
},
/**
* Returns endpoint of the specified name
* @param {String} name mainnet | testnet
* @return {Object}
*/
getEndPoint(name) {
return config.endpoints[name];
},
/**
* Get a endpoint for current environment
* @return {String}
*/
getEndPointFromEnv() {
//console.log('NODE_ENV : ' + process.env.NODE_ENV);
if (process.env.NODE_ENV === 'production') {
return this.getEndPoint('mainnet');
} else {
return this.getEndPoint('testnet');
}
},
/**
* Sleep for the specified time
* @param {Number} ms milliseconds
* @return {Promise}
*/
sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
},
/**
* Convert string to hexastring
* @param {String} str
* @return {String}
*/
convertToHex(str) {
let hex = '';
for(let i = 0; i < str.length; i++) {
hex += '' + str.charCodeAt(i).toString(16);
}
return hex;
},
};