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/* External Imports */
import { BigNumber } from 'ethers'
/**
* Converts a string or buffer to a '0x'-prefixed hex string.
* @param buf String or buffer to convert.
* @returns '0x'-prefixed string.
*/
export const toHexString = (buf: Buffer | string): string => {
return '0x' + fromHexString(buf).toString('hex')
}
/**
* Converts a '0x'-prefixed string to a buffer.
* @param str '0x'-prefixed string to convert.
* @returns Hex buffer.
*/
export const fromHexString = (str: string | Buffer): Buffer => {
if (typeof str === 'string' && str.startsWith('0x')) {
return Buffer.from(str.slice(2), 'hex')
}
return Buffer.from(str)
}
export const toHexString32 = (
input: Buffer | string | number,
padRight = false
): string => {
if (typeof input === 'number') {
input = BigNumber.from(input).toHexString()
}
input = toHexString(input).slice(2)
return '0x' + (padRight ? input.padEnd(64, '0') : input.padStart(64, '0'))
}
export const getHexSlice = (
input: Buffer | string,
start: number,
length: number
): string => {
return toHexString(fromHexString(input).slice(start, start + length))
}