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.

The 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.