ERC-1155
Each market's YES and NO tokens are different IDs within the same ERC-1155 contract.
Prediction Markets 101 editorial team Updated April 16, 2026 1 min read
Definition
ERC-1155 is an Ethereum token standard that supports multiple token IDs in a single contract. Polymarket uses ERC-1155 for conditional tokens.
Plain-English explanation
Compared to ERC-20 (one token per contract), ERC-1155 is efficient for systems with many related tokens. Polymarket's conditional tokens benefit from shared contract logic while tracking many distinct markets.