Crypto engines cpp - #2
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Repository restructured from coursework layout to a coherent two-layer toolkit:
C++ layer (cpp/):
- sha256/: SHA-256 from FIPS PUB 180-4, no external dependencies
- pow/: parallel prefix brute-forcer using std::thread + std::atomic across all cores
- collision/: birthday attack on djb2 32-bit hash, single and parallel modes
- bitcoin/: raw P2PKH tx builder — Base58Check, varint, SIGHASH_ALL preimage, DER layout
TypeScript/Solidity layer:
- contracts/ and test/ flattened from implementation/exercise-{1,2}/
- Python Tkinter clients removed; replaced with ethers.js CLI scripts (scripts/)
- Unified hardhat.config.ts and package.json at repo root
- deploy-vending.ts, deploy-ticket.ts, vending.ts, tickets.ts
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Delete remaining tracked files under implementation/ (old exercise READMEs referencing Python/Tkinter, and typechain artifacts from ex-1). These were left over from the restructure and contradicted the project's current stack. - Rename ganache container from ganache-ex1 to ganache. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Two parallel jobs: - cpp: cmake Release build, then smoke-tests pow (single prefix), collision, and tx_builder to verify all three engines run end-to-end - solidity: npm ci, hardhat build, hardhat test against the in-memory EDR network (no Ganache required in CI) Also accepts optional prefix args in pow so CI can run a short target without waiting for the full 32s 'decade' search.
hardhat run does not forward process.argv to scripts, so the previous vending.ts / tickets.ts CLIs silently ignored every command argument. Hardhat tasks receive typed, named options and are the idiomatic way to expose contract interactions as CLI commands: npx hardhat vending list --network ganache npx hardhat vending buy --product-id 1 --qty 2 --network ganache npx hardhat ticket list --network ganache npx hardhat ticket buy --event-id 1 --network ganache npx hardhat ticket list-resale --ticket-id 1 --price 0.03 --network ganache Deploy scripts (deploy-vending.ts, deploy-ticket.ts) are unchanged — they do not need arguments so hardhat run is fine for those.
Six test vectors (empty, "abc", 448-bit, "bitcoin", 55-byte, 56-byte) verify the implementation against authoritative Python hashlib values. CMakeLists.txt wires the test into ctest; CI runs ctest --output-on-failure. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Fix 'evemts'/'evetns'/'intrecations' typos in Solidity comments. Add tsconfig.json targeting ES2022/Node16 for the TS task files. Exclude the leftover untracked implementation/ directory via .gitignore. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- README layout table: scripts/vending.ts + tickets.ts → tasks/vending.ts + ticket.ts; test files corrected to .ts extension - README CLI examples: npm run vending/tickets → npx hardhat vending/ticket with correct --option-name flags matching the Hardhat 3 task definitions - VendingMachine.sol: bump pragma from ^0.8.20 to ^0.8.24 to match TicketOffice.sol and the hardhat.config.ts compiler version - package.json: add engines field declaring Node >=20 requirement Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Hardhat 3 dropped support for Node 20; bump CI setup-node and the engines field to >=22. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Rename getEvent() → getEventById() in TicketOffice.sol: ethers.js BaseContract exposes its own getEvent(nameOrTopic) method which shadowed the Solidity function, causing 'key.format is not a function'. Replace hre.network.connect() with hre.network.getOrCreate() across all task and test files to clear the Hardhat 3 deprecation warning. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
main edited the old exercise-1 README; our branch already removed the entire implementation/ directory as part of the homework → portfolio cleanup. Keeping the deletion. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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