Function validateTimestamp

http/unstable_message_signatures.ts:753–759

(value: number, name: string)

// =============================================================================

function validateTimestamp(value: number, name: string): void {
  if (!Number.isInteger(value) || value < 0) {
    throw new RangeError(
      `${name} must be a non-negative integer, got ${value}`,
    );
  }
}

function validateSignParams(params: SignatureParams): void {
  if (params.label !== undefined && !SF_KEY_REGEXP.test(params.label)) {