MyCrypto/common/libs/values.ts

77 lines
2.0 KiB
TypeScript

import { Wei, toTokenBase } from 'libs/units';
import { addHexPrefix } from 'ethereumjs-util';
import BN from 'bn.js';
import { NetworkKeys } from 'config';
export function stripHexPrefix(value: string) {
return value.replace('0x', '');
}
export function stripHexPrefixAndLower(value: string): string {
return stripHexPrefix(value).toLowerCase();
}
export function toHexWei(weiString: string): string {
return addHexPrefix(Wei(weiString).toString(16));
}
export function padLeftEven(hex: string) {
return hex.length % 2 !== 0 ? `0${hex}` : hex;
}
export function sanitizeHex(hex: string) {
const hexStr = hex.substring(0, 2) === '0x' ? hex.substring(2) : hex;
return hex !== '' ? `0x${padLeftEven(hexStr)}` : '';
}
export function networkIdToName(networkId: string | number): NetworkKeys {
switch (networkId.toString()) {
case '1':
return 'ETH';
case '3':
return 'Ropsten';
case '4':
return 'Rinkeby';
case '42':
return 'Kovan';
default:
throw new Error(`Network ${networkId} is unsupported.`);
}
}
export const buildEIP681EtherRequest = (
recipientAddr: string,
chainId: number,
etherValue: { raw: string; value: Wei | '' }
) => `ethereum:${recipientAddr}${chainId !== 1 ? `@${chainId}` : ''}?value=${etherValue.raw}e18`;
export const buildEIP681TokenRequest = (
recipientAddr: string,
contractAddr: string,
chainId: number,
tokenValue: { raw: string; value: Wei | '' },
decimal: number,
gasLimit: { raw: string; value: BN | null }
) =>
`ethereum:${contractAddr}${
chainId !== 1 ? `@${chainId}` : ''
}/transfer?address=${recipientAddr}&uint256=${toTokenBase(tokenValue.raw, decimal)}&gas=${
gasLimit.raw
}`;
export const sanitizeNumericalInput = (input: string): string => {
const inputFloat = parseFloat(input);
if (!input || isNaN(inputFloat)) {
return input;
}
// limit input field decrement to 0
if (inputFloat === -1) {
return '0';
}
// convert negative values to positive
return Math.abs(inputFloat).toString();
};