Sign Typed Data v1
This early version of the spec lacked some later security improvements, and should generally be neglected in favor of signTypedData_v3.
Also known as
signTypedData, originally premiered October 2017 in this blog post, this method was the original state-channel-centric signing method.
signTypedData familiy has a few major design considerations:
- Cheap to verify on chain
- Still somewhat human readable
- Hard to phish signatures
If on-chain verifiability cost is a high priority for you, you might want to consider it.