Experimental contract verify command #1778
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What
Add a
contract verifycommand that implements a subset of @orbitlens proposal:Try it out
Example
The leighmcculloch/exp-stellar-expert-verified-builds repo contains a contract that has been built by the
stellar-expert/soroban-build-workflowas well as a custom workflow that uses the attestation principles but not the stellar-expert build process.Contract built with
stellar-expert/soroban-build-workflowdeployed to CBLB:Contract built with
custom-release.ymldeployed to CCDI:Why
This change is an experimental implementation of a subset of the proposal to explore how other tooling might use the data and attestations published to confirm what code was the source of deployed wasm contracts.
The proposal includes principles for how to use GitHub's Attestation feature, based on Sigstore, to confidently link source code in a repository and a workflow run that builds an artifact, to a hash of the artifact. These principles are what's implemented in this change.
The proposal also includes details for how to use a third party GitHub Action
stellar-expert/soroban-build-workflowworkflow and build process to build contracts in a specific docker container and using specific actions, but the verification logic in this command at this time does not depend on those aspects of the proposal.For more details on why this change implements only a subset, see the discussion here:
Known Limitations
The verification logic was hacked together quickly and a final implementation should involve a thorough understanding and review of https://in-toto.io/Statement/v1 payloads and all the edge cases that could arise and should be caught.
Additionally it would be ideal if the payload signature was verified in Sigstore Rekor (transparency log), and that the payload could be optionally provided on the command line instead of downloaded via GitHub, because that would theoretically allow any sigstore in-toto attestation to be verified, not only GitHub's.
Status
As this change is an experiment it is not intended to be merged, not at least without significant additional work. It will remain in a draft state to be used to drive discussion.