github.com/Finschia/finschia-sdk@v0.48.1/x/bank/spec/01_state.md (about)

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     5  # State
     6  
     7  The `x/bank` module keeps state of three primary objects, account balances, denom metadata and the
     8  total supply of all balances.
     9  
    10  - Supply: `0x0 | byte(denom) -> byte(amount)`
    11  - Denom Metadata: `0x1 | byte(denom) -> ProtocolBuffer(Metadata)`
    12  - Balances: `0x2 | byte(address length) | []byte(address) | []byte(balance.Denom) -> ProtocolBuffer(balance)`