What is the default value TYK_GW_HASHKEYFUNCTION

[jakub-bochenski]

hash_key_function

EV: TYK_GW_HASHKEYFUNCTION
Type: string

Specify the Key hashing algorithm. Possible values: murmur64, murmur128, sha256.

The documentation doesn't tell what the default value will be if it's not specified (unlike e.g. basic_auth_hash_key_function)

[jakub-bochenski]

You promised to document default values back in May TykTechnologies/tyk-docs#2530

[jakub-bochenski]

Seems to be murmur32 based on those release notes https://github.com/TykTechnologies/tyk-docs/blob/af39a6183263dfe593d31450fafc3aebb4e7236c/tyk-docs/content/release-notes/version-2.7.md?plain=1#L38

Interesting that murmur32 is not even documented as a valid option

[andyo-tyk]

Hi @jakub-bochenski,

Tyk implements MurmurHash 3 and offers three different output sizes to allow tuning of the hash size and collision probability.

You can select the option you require using the TYK_GW_HASHKEYFUNCTION variable:
murmur32 - 32-bit output
murmur64 - 64-bit output
murmur128 - 128-bit output

You can alternatively choose the crytographic sha256 hashing algorithm.

The default value used by Tyk, if hashing is enabled but no algorithm selected via TYK_GW_HASHKEYFUNCTION is murmur64.

I'm sorry for the delay getting back to you on this.

Thank you for supporting Tyk!