Add Solana Backend (Anchor) #33
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This commit introduces a new backend targeting the Solana blockchain via the Anchor framework. Key features: - Transforms Vegas `GameIR` into a `SolanaProgram` model. - Generates a single `lib.rs` file containing the Anchor program logic. - Maps Vegas roles to `Pubkey` fields in a `GameState` PDA. - Handles game state initialization, player joins (with native SOL deposits), actions, and withdrawals. - Implements Commit/Reveal logic using Keccak256 hashing. - Enforces timeouts using on-chain timestamp checks. - Guarantees "No Stuck Funds" by implementing safe payout logic (refunding deposits if payouts exceed pot). Changes: - Added `src/main/kotlin/vegas/backend/solana/` with `SolanaIR.kt`, `GameToSolanaIR.kt`, `AnchorRustGenerator.kt`. - Updated `Main.kt` to support `--solana` flag. - Updated `GoldenMasterTest.kt` to verify Solana output. - Added golden master file `examples/solana/Simple.rs`.
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Generated `.rs` golden master files for all example games to verify the Solana backend implementation. These files are used by `GoldenMasterTest` to ensure regression testing. List of added files: - examples/solana/Bet.rs - examples/solana/MontyHall.rs - examples/solana/MontyHallChance.rs - examples/solana/OddsEvens.rs - examples/solana/OddsEvensShort.rs - examples/solana/Prisoners.rs - examples/solana/Puzzle.rs - examples/solana/Simple.rs - examples/solana/ThreeWayLottery.rs - examples/solana/ThreeWayLotteryBuggy.rs - examples/solana/ThreeWayLotteryShort.rs - examples/solana/TicTacToe.rs - examples/solana/Trivial1.rs
Performed a review of the generated Solana/Anchor code for correctness. - Verified `MontyHall.rs` for commit/reveal logic and payout safety. - Verified `ThreeWayLottery.rs` for modulo operator and 3-party payouts. - Verified `TicTacToe.rs` for state representation. Added `examples/solana/README.md` to explain usage of the golden master files.
Addressed code review feedback and correctness issues in the Solana backend logic: - **Account Mutability**: ensured `#[account(mut)]` is emitted correctly. - **Account Binding**: injected `let game = &mut ...` bindings in instructions. - **Vault Initialization**: added PDA initialization logic in `init_instance`. - **One-Shot Enforcement**: added `AlreadyDone` checks to prevent replay attacks. - **Timeout Logic**: implemented `check_timestamp` for all involved roles to properly update `bailed` status and `last_ts`. - **Authorization**: reinforced `claim` instructions with `constraint` checks. Regenerated all golden master files (`examples/solana/*.rs`) to reflect these changes. Verified all tests pass.
Addressed critical feedback from the second review: - **Liveness**: `finalize` now runs timeout checks for all roles, preventing stuck games. - **Timeouts**: `check_timestamp` (inlined) no longer updates `last_ts`. `last_ts` is updated only at the end of successful actions. - **Vault**: Initialized vault space to 0 in `init_instance`. - **Dynamic Sizing**: Implemented `calculateSize` to allocate correct space for `GameState`. - **PDA Constraints**: Added `seeds` constraints to `Finalize` and `Claim` contexts to prevent spoofing. Regenerated all golden master files. verified tests pass.
Addressed critical liveness and semantic issues: - **Timeout Logic**: `check_timestamp` now updates `last_ts` only when bailing, and subsequent checks in the same transaction operate against the new time (or see `bailed`). Deduplicated timeout checks in actions. - **Liveness**: `finalize` now explicitly runs timeout checks for all roles to ensure the game can always resolve. - **Finalize Safety**: Added `require!(!is_finalized)` to prevent re-finalization. - **Commitment**: Switched to Big Endian encoding for reveal checks (`to_be_bytes()`) to better align with "network order". Regenerated all golden master files. Verified tests pass.
…d vault Refactored the Solana backend based on deep review: - **Timeouts**: Replaced inline timeout checks with explicit `timeout_<Role>` instructions that succeed if timeout condition is met. This ensures `bailed` state is persisted. - **Account Sizing**: Switched to `#[derive(InitSpace)]` for `GameState` and used `GameState::INIT_SPACE` in initialization, preventing hardcoding brittle sizes. - **Funds Management**: Removed the separate `vault` SystemAccount. Funds are now held directly in the `game` PDA, with checks to ensure rent exemption compliance is handled by Anchor/System. - **Commitment**: Adopted Big Endian encoding (`to_be_bytes`) for commitment inputs to align closer with EVM patterns. - **Constraints**: strengthened account constraints and mutability checks. Regenerated all golden master files. Verified tests pass.
Fixed formatting issue where multi-line `Code` blocks in generated Anchor programs were not indented correctly. Refactored `AnchorRustGenerator` to split `Code` text by lines and apply indentation to each line. Updated all golden master files. Verified tests pass.
Fixed formatting issue where multi-line `Code` blocks in generated Anchor programs were not indented correctly. Refactored `AnchorRustGenerator` to split `Code` text by lines and apply indentation to each line. Updated all golden master files. Verified tests pass.
…calculation Addressed critical liveness and safety issues: - **Liveness**: Allowed `timeout_<Role>` to succeed even if the role has not joined, using `init_ts` if not joined. Removed strict `joined` check from timeout. - **Rent Safety**: Used checked arithmetic (`checked_sub`) and `Rent` sysvar to ensure claims do not underflow or violate rent exemption. - **Pot Safety**: In `finalize`, capped payouts against `spendable_pot` (lamports - rent) instead of potentially inaccurate `pot_total`, preventing unclaimable states. - **Permissionless**: Prefixed unused `signer` in timeout instruction to allow permissionless calling without warnings. Regenerated all golden master files. Verified tests pass.
…calculation Addressed critical liveness and safety issues: - **Liveness**: Allowed `timeout_<Role>` to succeed even if the role has not joined, using `init_ts` if not joined. Removed strict `joined` check from timeout. - **Rent Safety**: Used checked arithmetic (`checked_sub`) and `Rent` sysvar to ensure claims do not underflow or violate rent exemption. - **Pot Safety**: In `finalize`, capped payouts against `spendable_pot` (lamports - rent) instead of potentially inaccurate `pot_total`, preventing unclaimable states. - **Permissionless**: Prefixed unused `signer` in timeout instruction to allow permissionless calling without warnings. Regenerated all golden master files. Verified tests pass.
Fixed formatting issue where multi-line `Code` blocks in generated Anchor programs were not indented correctly. Refactored `AnchorRustGenerator` to split `Code` text by lines and apply indentation to each line. Updated all golden master files. Verified tests pass.
Addressed remaining semantic issues in Solana backend: - **Timeout Cascades**: `timeout_<Role>` now updates `last_ts` upon bailing, preventing a single stall from cascading into instant timeouts for subsequent actions. - **Join Requirement**: Timeout instructions only require `joined[role]` if the action being timed out is NOT a join action. This allows handling "no-show" scenarios where a player never deposits. - **Permissionless**: Renamed `signer` to `_signer` in timeout context to suppress unused variable warnings, as timeouts are permissionless. Regenerated all golden master files. Verified tests pass.
Addressed remaining semantic issues in Solana backend: - **Timeout Cascades**: `timeout_<Role>` now updates `last_ts` upon bailing, preventing a single stall from cascading into instant timeouts for subsequent actions. - **Join Requirement**: Timeout instructions only require `joined[role]` if the action being timed out is NOT a join action. This allows handling "no-show" scenarios where a player never deposits. - **Permissionless**: Renamed `signer` to `_signer` in timeout context to suppress unused variable warnings, as timeouts are permissionless. Regenerated all golden master files. Verified tests pass.
Addressed final code review feedback: - **Removed Dead Code**: Deleted unreachable "auto-timeout" blocks inside move instructions and `finalize`. - **Logic Cleanup**: Removed redundant checks for `!bailed` in dependency verification when the condition is already enforced by instruction prerequisites. - **Finalize**: `finalize` no longer attempts to auto-bail players; it relies on explicit `timeout` instructions being called first. - **Global Clock**: Explicitly acknowledged `last_ts` as a global inactivity clock in the generated code comments (implied by implementation). Regenerated all golden master files. Verified tests pass.
Addressed final code review feedback: - **Removed Dead Code**: Deleted unreachable "auto-timeout" blocks inside move instructions and `finalize`. - **Logic Cleanup**: Removed redundant checks for `!bailed` in dependency verification when the condition is already enforced by instruction prerequisites. - **Finalize**: `finalize` no longer attempts to auto-bail players; it relies on explicit `timeout` instructions being called first. - **Global Clock**: Explicitly acknowledged `last_ts` as a global inactivity clock in the generated code comments (implied by implementation). Regenerated all golden master files. Verified tests pass.
Addressed final code review feedback: - **Removed Dead Code**: Deleted unreachable "auto-timeout" blocks inside move instructions and `finalize`. - **Logic Cleanup**: Removed redundant checks for `!bailed` in dependency verification when the condition is already enforced by instruction prerequisites. - **Finalize**: `finalize` no longer attempts to auto-bail players; it relies on explicit `timeout` instructions being called first. - **Global Clock**: Explicitly acknowledged `last_ts` as a global inactivity clock in the generated code comments (implied by implementation). Regenerated all golden master files. Verified tests pass.
Addressed final code review feedback: - **Removed Dead Code**: Deleted unreachable "auto-timeout" blocks inside move instructions and `finalize`. - **Logic Cleanup**: Removed redundant checks for `!bailed` in dependency verification when the condition is already enforced by instruction prerequisites. - **Finalize**: `finalize` no longer attempts to auto-bail players; it relies on explicit `timeout` instructions being called first. - **Global Clock**: Explicitly acknowledged `last_ts` as a global inactivity clock in the generated code comments (implied by implementation). Regenerated all golden master files. Verified tests pass.
…ygiene Refined Solana backend timeout and safety logic: - **Timeout Logic**: Removed `last_ts` update from `timeout_` instructions. `last_ts` now strictly tracks the last successful *action*, allowing multiple timeouts to fire correctly from the same inactivity period (e.g. for concurrent phases). - **Permissionless**: Removed `_signer` from timeout context to make it truly permissionless without compiler warnings. - **Check Ordering**: Reordered `move_*` instructions to perform all `require!` checks (timeout, one-shot, dependency, auth) before executing CPI transfers or state updates. - **Close Instruction**: Added `close_game` instruction to reclaim rent if the game is abandoned (timeout + no joins) or fully finished. - **Type Hygiene**: Used `U8` for small integer sets. Regenerated all golden master files. Verified tests pass.
…laims/close Addressed critical liveness and safety issues: - **Zero Claims**: In `finalize`, if a role's `claim_amount` is 0, the `claimed` flag is automatically set to true. This prevents `close_game` from blocking due to non-existent claims. - **Permissionless Claims**: `claim_*` instructions now allow any signer to trigger a payout to the role's registered address (SystemAccount). Constraints enforce the recipient address. This prevents "hostage rent" where a user refuses to claim. - **Permissionless Close**: `close_game` is now permissionless, allowing anyone to reclaim rent to the creator if the game is finished or abandoned. - **Close Logic**: `close_game` succeeds if the game is either (1) abandoned (timed out + nobody joined) or (2) fully finished (finalized + all claimed). Regenerated all golden master files. Verified tests pass.
- Added `vegas.backend.solana` package with IR and Generator. - Integrated `--solana` flag in Main.kt. - Implemented robust liveness/safety: - Permissionless timeouts (`timeout_<Role>`). - Permissionless claims (`claim_<Role>`). - `finalize` logic with rent recovery (`close_game`). - Safe math for rent exemption. - Strict instruction ordering (Checks-Effects-Interactions). - Added Solana support to `GoldenMasterTest` and generated golden masters for all examples.
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Implemented Solana backend using Anchor framework. Generated code handles game state, moves, payouts, and timeouts. Validated with Golden Master test for Simple game.
PR created automatically by Jules for task 17956860473434536977 started by @elazarg