IMPT contracts on Ethereum mainnet

Verified contract addresses, proxy patterns, and key function references for the IMPT on-chain stack.

Direct answer

Three production contracts on Ethereum mainnet: IMPT ERC-20, CarbonCreditNFT v2 (ERC-1155), SalesManager v2.

Addresses

IMPT ERC-20: 0x04C17b9D3b29A78F7Bd062a57CF44FC633e71f85 — verified on Etherscan.
CarbonCreditNFT v2: 0xF473eA545dF03a57beF96BAf96188a6b6d673050 — ERC-1155, upgradeable.
SalesManager v2: 0x3a773fFAAF44baa79Bb09dAedC67f261F5964612 — booking-side coordinator.

SalesManager.purchaseWithIMPT(bookingId, tokenId, amount, signature) — booking-time mint+lock.
CarbonCreditNFT.retire(tokenId, amount, beneficiary, bookingRef) — retirement.
CarbonCreditNFT.balanceOf(address, tokenId) — ERC-1155 balance.
CarbonCreditNFT.totalRetiredBy(address) — soulbound retirement counter.

Retired(uint256 indexed tokenId, uint256 amount, address indexed holder, bytes32 bookingRef). Index by bookingRef to verify a specific IMPT booking.

Live availability across 1.7M hotels — same price as direct, free cancellation on most stays.