_assert.ts•1.44 kB
function number(n: number) {
if (!Number.isSafeInteger(n) || n < 0) throw new Error(`Wrong positive integer: ${n}`);
}
function bool(b: boolean) {
if (typeof b !== 'boolean') throw new Error(`Expected boolean, not ${b}`);
}
function bytes(b: Uint8Array | undefined, ...lengths: number[]) {
if (!(b instanceof Uint8Array)) throw new Error('Expected Uint8Array');
if (lengths.length > 0 && !lengths.includes(b.length))
throw new Error(`Expected Uint8Array of length ${lengths}, not of length=${b.length}`);
}
type Hash = {
(data: Uint8Array): Uint8Array;
blockLen: number;
outputLen: number;
create: any;
};
function hash(hash: Hash) {
if (typeof hash !== 'function' || typeof hash.create !== 'function')
throw new Error('Hash should be wrapped by utils.wrapConstructor');
number(hash.outputLen);
number(hash.blockLen);
}
function exists(instance: any, checkFinished = true) {
if (instance.destroyed) throw new Error('Hash instance has been destroyed');
if (checkFinished && instance.finished) throw new Error('Hash#digest() has already been called');
}
function output(out: any, instance: any) {
bytes(out);
const min = instance.outputLen;
if (out.length < min) {
throw new Error(`digestInto() expects output buffer of length at least ${min}`);
}
}
export { number, bool, bytes, hash, exists, output };
const assert = { number, bool, bytes, hash, exists, output };
export default assert;