EIP-3074: AUTH and AUTHCALL opcodes

[matt]

@xinbenlv

Invoker is first introduced in this EIP and was not a common terminology prior. Can we give a definition of invoker at the first time when the word invoker appear? (Especially to clarify relationship with signer)

It’s defined immediately after it appears. Read the third bullet of this section. It’s discussed in even more detail later on.