Ferruns

opdev.tech scans your on-chain history — deployments, swaps, gas spent, transaction patterns — computes a reputation score, and lets you mint soulbound OP721 NFT badges that prove what you've actually done on Bitcoin. Key features: Soulbound NFTs — all transfer/approve methods revert; badges cannot be sold or moved Real on-chain scan — eligibility computed from live block-by-block RPC data, not self-reported Extensible badge registry — deployer can add new badge types without redeploying Twitter/X identity — link your X handle via OAuth for the "Linked" badge Endorse system — peer endorsements unlock the "Vouched" badge Leaderboard — ranked by badge score with per-entry endorse button Wallet-compatible metadata — tokenURI returns HTTPS URL with PNG image (renders in OP_WALLET) Profile sharing — pre-filled tweet with on-chain verification link

SatStash is a Bitcoin L1 DeFi application built on OPNet that lets users swap tokens and automatically route "dust" into a time-locked savings vault — all in a single transaction.

OP-Sign is a trustless document notarization protocol built on OPNet, Bitcoin's Layer 1 smart contract platform. It lets anyone prove that a specific document existed at a specific Bitcoin block height, attested by a specific signer — with no intermediaries, no servers, and no trusted third parties.

Eternal Sentinel is a decentralized, progressive Dead Man's Switch vault built directly on Bitcoin L1 via OPNet. It acts as a trustless, automated inheritance protocol that protects an owner's BTC by requiring them to periodically "check in" to prove they are alive. If the owner's heartbeat lapses, the smart contract automatically triggers a two-tier release of the funds to a designated beneficiary: Tier 1: 10% of the vault is unlocked after roughly 6 months (26,280 blocks) of inactivity. Tier 2: The remaining 90% is released after 12 months (52,560 blocks), permanently finalizing the contract.