Function verifySignature

verifySignature(
    secret: string | Uint8Array<ArrayBufferLike>,
    header: string,
    body: Uint8Array,
    nowMs?: number,
): string | null
Checks a fusee-signature value (t=<unix ms>,v1=<hex HMAC-SHA256>) within five minutes.
Parameters
- secret: string | Uint8Array<ArrayBufferLike>
- header: string
- body: Uint8Array
- nowMs: number = ...
Returns string | null