# State

The `x/bank` module keeps state of the following primary objects:

1. Account balances
2. Denomination metadata
3. The total supply of all balances
4. Information on which denominations are allowed to be sent.

In addition, the `x/bank` module keeps the following indexes to manage the aforementioned state:

* Supply Index: `0x0 | byte(denom) -> byte(amount)`
* Denom Metadata Index: `0x1 | byte(denom) -> ProtocolBuffer(Metadata)`
* Balances Index: `0x2 | byte(address length) | []byte(address) | []byte(balance.Denom) -> ProtocolBuffer(balance)`
* Reverse Denomination to Address Index: `0x03 | byte(denom) | 0x00 | []byte(address) -> 0`

### Params <a href="#params" id="params"></a>

The bank module stores it's params in state with the prefix of `0x05`, it can be updated with governance or the address with authority.

* Params: `0x05 | ProtocolBuffer(Params)`

```protobuf
// Params defines the parameters for the bank module.
message Params {
  option (gogoproto.goproto_stringer)       = false;
  repeated SendEnabled send_enabled         = 1;
  bool                 default_send_enabled = 2;
}
```


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