@ledgerhq/coin-casper
Version:
Ledger Casper integration
39 lines • 1.5 kB
JavaScript
import BigNumber from "bignumber.js";
const validHexRegExp = new RegExp(/[0-9A-Fa-f]{6}/g);
const validBase64RegExp = new RegExp(/^(?:[A-Za-z\d+/]{4})*(?:[A-Za-z\d+/]{3}=|[A-Za-z\d+/]{2}==)?$/);
export const isNoErrorReturnCode = (code) => code === 0x9000;
export const getPath = (path) => path && path.substring(0, 2) !== "m/" ? `m/${path}` : path;
export const isValidHex = (msg) => validHexRegExp.test(msg);
export const isValidBase64 = (msg) => validBase64RegExp.test(msg);
export const isError = (r) => {
if (!isNoErrorReturnCode(r.returnCode))
throw new Error(`${r.returnCode} - ${r.errorMessage}`);
};
export const methodToString = (method) => {
switch (method) {
case 0:
return "Token transfer";
default:
return "Unknown";
}
};
export const getBufferFromString = (message) => {
if (isValidHex(message)) {
return Buffer.from(message, "hex");
}
if (isValidBase64(message)) {
return Buffer.from(message, "base64");
}
return Buffer.from(message);
};
function randomIntFromInterval(min, max) {
const minBig = new BigNumber(min);
const maxBig = new BigNumber(max);
const random = BigNumber.random().multipliedBy(maxBig.minus(minBig).plus(1)).plus(minBig);
const randomInt = random.integerValue(BigNumber.ROUND_FLOOR);
return randomInt.toString();
}
export function getRandomTransferID() {
return randomIntFromInterval(0, Number.MAX_SAFE_INTEGER);
}
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