bug: crypto package cannot handle vendorfield > 255

[ItsANameToo]

the crypto SDK reads uint8 for vendorfield length, so it's capped at 256 max and causes issues when you deploy a chain that sets a larger vendorfield limit

Expected Behavior

should handle larger vendorfields too

Current Behavior

it doesn't

Possible Solution

change uin8 to uin16 for a larger range

Steps to Reproduce (for bugs)

1. set up a chain with a larger vendorfield (e.g. 1024)
2. set up the sdk to use that network
3. try to send a tx with > 256 bytes vendorfield
4. run into ser/der issues

Context

Your Environment

• latest everything

[air1one]

We just won't allow vendorField > 255 bytes, IPFS and custom transactions are here in case anyone wants to store more data 👌