Skip to content

CIP-0112 | Changes to signature checking #1105

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
polinavino wants to merge 1 commit into from
Closed

CIP-0112 | Changes to signature checking #1105

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 6 additions & 0 deletions CIP-0112/README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -172,7 +172,13 @@ Native scripts are typically represented in JSON syntax. We propose the followin
"keyHash": "OBSERVATION_SCRIPT_HASH"
}
```
### Changes to signature checking

**Change :** Currently, the `txid`, i.e. the hash of the transaction body, is signed. We propose this is changed to all keys instead signing the hash of the concatenation `txid_and_obs = hash (txid ++ required_observers_hash)`. This would also require that the `TxBody` type contain the hash of the `required_observers` field *in addition* to the deserialized contents of the field, e.g. as a
separate field, or as a pair `(required_observers_hash , required_observers)`. Both `required_observers_hash` and `txid_and_obs` should be computed during transaction deserialization and included
in the deserialized `TxBody`.

**Target Use Case :** The primary purpose of this change is to support super lightweight checking that a transaction with a given `txid` satisfies some intent specified in the form of an observer script. This would greatly simplify certain intent-based light client designs.

## Rationale: how does this CIP achieve its goals?

Expand Down