S

smart-contracts

BlockHearth is an open-source, blockchain-powered property title custody and transparency platform designed to make property ownership records more secure, verifiable, and accessible. By combining immutable title histories, cryptographic document verification, smart contract-assisted transfers, and government registry integration, BlockHearth aims to strengthen trust, reduce title fraud, and improve transparency throughout the property ownership lifecycle. https://roxanneardary.com/blockhearth/

❤️ Official github mirror of the Binance (BEP20) token simple smart contract template using Solidity

Constant-product AMM on Solana (Anchor 0.31) with SPL Token / Token-2022 and documented Sealevel mitigations.

Real-world asset tokenization with ERC-3643: identity, transfer restrictions and address freezing. Module 19.

Educational privacy pool: Poseidon Merkle tree, Circom/Groth16 withdrawals and nullifiers. Module 17.

ERC-20 token with EIP-2612 permit, fuzz tests and gas snapshots. Module 01 of a Foundry suite.

ChainPilot is an open-source, AI-powered platform for building Solana protocols and decentralized applications. It streamlines development through AI-assisted smart contract generation, security analysis, automated testing and simulation, deployment management, and upgrade lifecycle management, helping developers build, verify, and maintain Solana projects with greater efficiency and human oversight. https://roxanneardary.com/chainpilot/

Cross-chain messaging with LayerZero V2 and Chainlink CCIP adapters, anti-spoofing and anti-replay. Module 16.

Resilient price consumer with staleness, round and bounds checks; push vs pull feeds compared. Module 13.

Linear token vesting with cliff and revocation on Solana (Anchor), Token-2022 compatible, Next.js UI.

NFT marketplace on Solana: Anchor program with PDA escrow, Metaplex royalties, SPL/Token-2022 and Next.js.

Atomic SPL token escrow on Solana (legacy + Token-2022), deployed on devnet, with a Next.js UI.

Dark pool with Poseidon commitments, on-chain ZK matching and atomic settlement in a shielded vault. Module 21.

Institutional custody vault: M-of-N EIP-712 approvals, ERC-1271, spending limits, timelocked recovery. Module 20.

stETH/wstETH-style liquid staking: rebasing shares, wrapper, oracle and async withdrawal queue. Module 18.

MEV/HFT searcher infrastructure: atomic arbitrage, backrun, Yul tips and SWC review. Module 15.

Uniswap v3-style concentrated liquidity: ticks, Q64.96 math, tick bitmap, multi-tick swaps. Module 14.

ERC-4337 smart account, signature validator and sponsoring paymaster with EntryPoint-only auth. Module 12.

Upgradeable contracts: UUPS and Transparent proxies (ERC-1967) with upgrade safety tests. Module 11.

On-chain governance with checkpointed voting power, full proposal lifecycle and a timelock. Module 10.