Flow Core Contracts

Flow relies on a set of core contracts that define key portions of the Flow protocol.

These contracts control the following:

• Standard fungible token behavior. (FungibleToken)
• Flow Protocol Token. (FlowToken)
• Flow Service Account. (ServiceAccount)
• Account, transaction and storage fee payments. (FlowFees and FlowStorageFees)
• Staking and delegation (FlowIDTableStaking)
• Epochs (FlowEpoch)

There are other important contracts that aren't part of the core protocol but are nevertheless important to developers on Flow:

• Standard Non-Fungible Token Behavior. (NonFungibleToken)
• NFT Metadata Standard. (MetadataViews)
• Staking Collection. (StakingCollection)
• NFT Storefronts. (NFTStorefront)
• Account linking and Hybrid Custody. (AccountLinking)