INNER CODE UNIT · TypeScript

div

privy-io/shamir-secret-sharing · src/index.ts:65

function div(a: number, b: number): number {
  if (!Number.isInteger(a) || a < 0 || a > 255) {
    throw new RangeError('Number is out of Uint8 range');
  }
  if (!Number.isInteger(b) || b < 0 || b > 255) {
    throw new RangeError('Number is out of Uint8 range');
  }
  // This should never happen
  if (b === 0) {
    throw new Error('cannot divide by zero');
  }

  const logA = LOG_TABLE[a]!;
  const logB = LOG_TABLE[b]!;
  const diff = (logA - logB + 255) % 255;
  const result = EXP_TABLE[diff]!;

  return a === 0 ? 0 : result;

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