BEP-1155
Abbreviation: BEP-1155
Pronunciation: BEE-EE-PEE one-thousand-one-hundred-fifty-five
Also known as: BEP-1155
Definition
BEP-1155 is the BNB Smart Chain adaptation of the multi-token contract pattern for managing fungible and non-fungible assets together. Batch transfers and shared approval methods can reduce deployment and transaction overhead compared with separate contracts. However, one operator approval may authorize movement across every token ID owned within that contract, increasing the impact of unsafe permissions or compromised applications.
Overview
Meaning and scope
BEP-1155 is the BNB Smart Chain adaptation of the multi-token contract pattern for managing fungible and non-fungible assets together. Batch transfers and shared approval methods can reduce deployment and transaction overhead compared with separate contracts. However, one operator approval may authorize movement across every token ID owned within that contract, increasing the impact of unsafe permissions or compromised applications.
Mechanism and operation
BEP-1155 commonly describes token contracts on BNB Smart Chain that follow the multi-token interface associated with ERC-1155. One contract can manage many token identifiers, with each identifier representing fungible units, unique items, or semi-fungible assets. Wallets, marketplaces, and custody systems should verify the chain, contract address, token ID, quantity, metadata source, and operator approvals. Indexers must process single and batch transfer events correctly. This allows reproducible debugging when a later upgrade changes parsing, validation, signing, or interoperability behavior. Operational records for BEP-1155 should retain the version and configuration used for each relevant transaction or message.
Practical payment example
A game sells several token types through a single multi-token contract on BNB Smart Chain. Its checkout verifies the contract address and token ID as well as the amount; an address and ticker alone are insufficient.
Operational checks
BEP-1155 should be implemented against an exact document revision, status, and activation context. Implementations should validate normative requirements, encodings, error behavior, security conditions, and test vectors, including malformed and boundary inputs that ordinary happy-path tests miss. Conformance to BEP-1155 requires more than matching a field name or example.
Distinctions and limits
The label BEP-1155 should not be treated as proof that every implementation follows identical security behavior. Draft, final, optional, and network-activated specifications have different authority, and similarly named deployments may support different subsets or extensions.
Related reading
Related definitions: contract address.
Example
A game sells several token types through a single multi-token contract on BNB Smart Chain. Its checkout verifies the contract address and token ID as well as the amount; an address and ticker alone are insufficient.
Comparison
However, one operator approval may authorize movement across every token ID owned within that contract, increasing the impact of unsafe permissions or compromised applications. The label BEP-1155 should not be treated as proof that every implementation follows identical security behavior.
Key Takeaway
BEP-1155 contracts manage multiple asset types efficiently, but token IDs, quantities, and broad operator approvals require careful handling.
Sources
- BNB Chain BEP Repository — BNB Chain (2026-07-30)
- BNB Chain Documentation — BNB Chain (2026-07-30)
- Ethereum Foundation Documentation: Smart Contracts — Ethereum Foundation (2026-07-30)