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export const b2: string[] =
'01'.split('')
export const b16: string[] =
'0123456789abcdef'.split('')
export const b62: string[] =
'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('')
export function encode(n: bigint, charset: string[]): string {
const base = BigInt(charset.length)
if (n == BigInt(0)) {
return '0'
} else {
var xs = []
while (n > BigInt(0)) {
xs.push(charset[Number(n % base)])
n = n / base
}
return xs.reverse().join('')
}
}
export function decode(xs: string, charset: string[]): bigint {
const base = BigInt(charset.length)
return xs
.split('')
.reverse()
.reduce((acc, x, i) => acc + (BigInt(charset.indexOf(x)) * (base ** BigInt(i))), BigInt(0))
}
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