ERC-1155

ERC-1155

ERC-1155 is an Ethereum token standard for "multi-token" contracts that can mint and manage both fungible and non-fungible tokens within a single contract. Unlike ERC-20 (fungible-only) or ERC-721 (NFT-only), ERC-1155 lets a contract hold multiple token types indexed by ID and provides batch transfer and approval operations to reduce gas and simplify bookkeeping.

In context

On Polymarket, the Conditional Token Framework (CTF) mints outcome tokens as ERC-1155 instances. Each outcome — for example YES or NO in a binary market — is represented by an ERC-1155 token ID. The CTF uses ERC-1155's batch and split/merge-friendly mechanics to implement efficient operations such as split, merge, and redeem. These operations let traders create or unwind complete sets of outcome tokens, move multiple token types in a single transaction, and minimise on-chain complexity.

See also

• /glossary/ctf