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name: bitcoin-l2-map-protocol description: | MAP Protocol: omnichain interoperability layer with Bitcoin integration. Cross-chain messaging across many chains; positions itself as Bitcoin L2 connector. Butter Bridge V3.1 was exploited on 20 May 2026; read the status note before treating it as production bridge infrastructure. USE WHEN: building cross-chain apps spanning Bitcoin + others. allowed-tools: Read, Grep, Glob

MAP Protocol

Omnichain interoperability protocol with Bitcoin focus. Provides cross-chain messaging + bridges including Bitcoin.

Status (September 2026)

Butter Bridge V3.1 exploit, 20 May 2026. MAP Protocol shut down the bridge connecting MAPO ERC-20 on Ethereum to the MAPO mainnet after a reported exploit of Butter Bridge V3.1, paused mainnet operations, and began a migration to new token contracts. As of 15 September 2026 no post-mortem appears on mapprotocol.io or docs.mapprotocol.io - neither carries any notice of the incident - and MAP's Medium account has published nothing since April 2022. Press reporting on 20 May 2026 said the exploit mechanism and the extent of losses had not been disclosed.

Press reporting (20-21 May 2026, not confirmed by MAP) describes an attacker deploying a contract that manipulated an oracle multisig-signed message to mint roughly a quadrillion MAPO, then dumping ~1B of them on Uniswap for 52 ETH ($180k). Treat those figures as press-reported, not disclosed. Independent corroboration of the date does exist: CoinGecko records MAPO's all-time low of $0.00034224 on 20 May 2026.

The 1:1 swap to new Ethereum and BNB Chain token contracts has since completed; CoinGecko lists both at 0x7046933234A82AF77F14625e8d0fA9Bcc5044a7E as of 15 September 2026, and mapprotocol.io again advertises live cross-chain traffic. Whether the Ethereum <-> mainnet bridge itself reopened could not be independently confirmed.

Practical stance: treat MAP primarily as a case study in light-client/mint-authority bridge design. Do not route value through it without your own audit of the current MOS/Butter contracts.

Architecture

• Light-client based bridges between MAP-compatible chains.
• Bitcoin integration: SPV-style verification for cross-chain Bitcoin transactions.
• Native token: MAPO.

Use cases

• Cross-chain swaps Bitcoin ↔ EVM chains.
• Multi-chain dApps.
• Asset bridges.

Position

Niche player; smaller TVL than dominant L2s. Focus on interoperability rather than smart-contract execution. As of 15 September 2026 MAPO's market cap is roughly $8M (CoinGecko rank #1346) and the price is still well below its pre-exploit level ($0.003 reported on 20 May 2026), so the economic security backing maintainer bonds is correspondingly thin.

See also

• bob/SKILL.md
• hemi/SKILL.md
• threshold-tbtc/SKILL.md