1import { calcHash } from './calcHashF.mts'
2import { getPlainMappedSec } from './secretsF/getReqJsonSecretHF.mts'
3import { tsSecs } from './secretsF/tsSecF.mts'
4
5const saltedCache: Record<string, string> = {}
6
7export const getSaltedAppSecret = (salt: string, length = 12): string | null => {
8  const cacheKey = `${salt}:${length}`
9  try {
10    return saltedCache[cacheKey] ||= calcHash(`${getPlainMappedSec(tsSecs.appSecret)}:${salt}`).slice(0, length)
11  } catch { return null }
12}
13
14export const getExceptionTrigger = () => {
15  const s = getSaltedAppSecret('exceptionTrigger', 16)
16  return s ? `xthrow${s}` : null
17}
18
19export const getTestIpHeaderName = () => {
20  const s = getSaltedAppSecret('testIpHeader', 12)
21  return s ? `x-test-ip-${s}` : null
22}
23
24export const getTestExceptionHeaderName = () => {
25  const s = getSaltedAppSecret('testException', 12)
26  return s ? `x-test-exception-${s}` : null
27}
28
29export const getTestCapBypassHeaderName = () => {
30  const s = getSaltedAppSecret('testCapBypass', 12)
31  return s ? `x-test-capbypass-${s}` : null
32}
33