[AlphaMaleBaDI]

Summary

npm run verify:data-integrity currently fails on every branch, including main at 044976e:

[verify:data-integrity] Generated artifacts are out of date.

The committed artifacts have drifted from contracts/lib.rs and contracts/errors.rs. This PR is the output of running the generator — no hand edits.

npm run generate:contract-types

What drifted

• AlreadyClaimed (error code 22) was never generated into the interface
• ClaimEpoch and LastClaimEpoch storage keys were missing
• Several error doc strings were stale

Changes

File	Change
contracts/interface/splitnaira.contract-interface.json	regenerated: +37/−17
backend/src/generated/contract-types.ts	adds AlreadyClaimed: 22
frontend/src/generated/contract-types.ts	adds AlreadyClaimed: 22

Validation

$ npm run verify:data-integrity
✓ contracts/README.md error table matches errors.rs
Generated contracts/interface/splitnaira.contract-interface.json
✓ contract interface artifact is current
Generated backend types: backend/src/generated/contract-types.ts
Generated frontend types: frontend/src/generated/contract-types.ts
✓ generated contract types match interface artifact

All data integrity checks passed.

Why this is worth merging on its own

This failure is red on main and blocks the build and data-integrity jobs for every pull request in the repository, including PRs that do not touch contracts. Fixing it here unblocks everyone.

Related: #362 (the CI gate that detects this drift).

No linked issue — this is artifact drift, not a feature.