BEP-20

Overview

BEP-20 defines common functions and events for fungible tokens on BNB Smart Chain. Contracts expose balances, total supply, transfers, allowances, and approvals through an interface closely aligned with ERC-20, allowing wallets and decentralized applications to integrate tokens consistently.

Compatibility does not make every BEP-20 token trustworthy or economically equivalent. Contracts can contain minting, pausing, transfer restrictions, fees, proxies, blacklists, or malicious logic. Tokens with the same symbol may also exist at many unrelated contract addresses. Payment systems should identify a token by chain ID and verified contract address, then confirm decimals and transfer behavior. Deposit monitoring must parse canonical Transfer events and final receipts. Approval flows should minimize allowances and warn users before granting a contract broad spending authority.

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-20 requires more than matching a field name or example. Teams adopting BEP-20 should track errata, compatibility changes, and the deployed software versions that enforce it. When evaluating BEP-20, a published standard does not prove universal adoption, safe implementation, or activation on a particular blockchain or payment network.

This allows reproducible debugging when a later upgrade changes parsing, validation, signing, or interoperability behavior. Operational records for BEP-20 should retain the version and configuration used for each relevant transaction or message. BEP-20 should be implemented against an exact document revision, status, and activation context. Draft, final, optional, and network-activated specifications have different authority, and similarly named deployments may support different subsets or extensions.