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44 lines
1.4 KiB
44 lines
1.4 KiB
/* @flow */
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import BigNumber from 'bignumber.js';
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import EthereumjsUtil from 'ethereumjs-util';
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export const decimalToHex = (dec: number): string => new BigNumber(dec).toString(16);
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export const padLeftEven = (hex: string): string => {
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hex = hex.length % 2 != 0 ? `0${hex}` : hex;
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return hex;
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};
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export const sanitizeHex = (hex: number | string): ?string => {
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if (typeof hex !== 'string') return null;
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hex = hex.substring(0, 2) === '0x' ? hex.substring(2) : hex;
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if (hex === '') return '';
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return `0x${padLeftEven(hex)}`;
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};
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export const hexToDecimal = (hex: number): string => {
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const sanitized: ?string = sanitizeHex(hex);
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return !sanitized ? 'null' : new BigNumber(sanitized).toString();
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};
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export const strip = (str: string): string => {
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if (str.indexOf('0x') === 0) {
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return padLeftEven(str.substring(2, str.length));
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}
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return padLeftEven(str);
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};
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export const calcGasPrice = (price: BigNumber, limit: string): string => price.times(limit).toString();
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export const validateAddress = (address: string): ?string => {
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const hasUpperCase = new RegExp('^(.*[A-Z].*)$');
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if (address.length < 1) {
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return 'Address is not set';
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} else if (!EthereumjsUtil.isValidAddress(address)) {
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return 'Address is not valid';
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} else if (address.match(hasUpperCase) && !EthereumjsUtil.isValidChecksumAddress(address)) {
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return 'Address is not a valid checksum';
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}
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return null;
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} |