Ponstaking prototype is missing vendored Pausable.sol dependency

[koriyoshi2041]

Summary

The Ponstaking prototype added in 4166bfb3 cannot currently be compiled from the repository because it imports @openzeppelin/contracts/utils/Pausable.sol, but that file is absent from the vendored OpenZeppelin tree under contractsV2/lib/openzeppelin-contracts/contracts/.

The other OpenZeppelin imports used by PonsV2Staking.sol are present and resolve with the repository's detected remappings.

Reproduction

From a fresh clone at debbc21f:

forge build \
  --root contractsV2 \
  --contracts src/v2/hooks/PonstakingV2_test/PonsV2Staking.sol \
  --remappings '@openzeppelin/=lib/openzeppelin-contracts/' \
  --force -vv

The compiler reports:

Error (6275): Source "lib/openzeppelin-contracts/contracts/utils/Pausable.sol" not found
 --> src/v2/hooks/PonstakingV2_test/PonsV2Staking.sol:9:1

Confirmed locally with Foundry/Solc 0.8.33. The contract's pragma is ^0.8.26.

Suggested minimal fix

Vendor the Pausable.sol source matching the existing OpenZeppelin version, including any dependencies it requires, or replace the partial vendored dependency with a pinned OpenZeppelin dependency/submodule. A small Foundry configuration or CI compile check for the prototype would also prevent future missing-vendored-file regressions.

I have not proposed copying an arbitrary current OpenZeppelin file because it should match the version of the already-vendored contracts.

[koriyoshi2041]

Update after checking the current default branch (44a3db9): this is no longer reproducible because the Ponstaking prototype itself was removed in b2d3d61 on 2026-09-17. Neither

contractsV2/src/v2/hooks/PonstakingV2_test/PonsV2Staking.sol

nor its missing Pausable.sol dependency is present on main now.

I also rechecked the repository tree and commit history today. The last version containing the prototype still fails without the dependency, but adding Pausable.sol alone against current main would now reintroduce an otherwise removed experimental module and is therefore not an appropriate fix.

Recommendation: close this issue as obsolete unless Ponstaking is intentionally restored. If it is restored later, the dependency should be pinned/vendored together with a targeted compile check.