# module\_bank

#### `bank` module

#### Introduction

The `bank` module maintains the state of two primary objects:

* Account balances by address;
* Total supply of tokens on the chain

`bank` module tracks and provides query support for the total supply of all assets used in the application. It also supports token transfer functionalities. Specifically, the total supply is updated whenever a token is:

* **Minted**, e.g. Token created by the [mint](https://github.com/crypto-org-chain/chain-docs/blob/Gitbook/docs/chain-details/module_mint/README.md) module; or
* **Burned**, e.g. Token distorted by the [slashing](https://github.com/crypto-org-chain/chain-docs/blob/Gitbook/docs/chain-details/module_slashing/README.md) module.

#### Transactions and Queries

#### Transactions

**`tx bank send [from_key_or_address] [to_address] [amount] [network_id]` - Send Funds**

You can transfer tokens to a designated address by the `tx bank send` command. For example, we can send 10 CRO from `address_a` to `address_b` by

```bash
$ chain-maind tx bank send <address_a> <address_b> 10cro --chain-id <chain-id>

## Transaction payload##
{"body":{"messages":[{"@type":"/cosmos.bank.v1beta1.MsgSend","from_address"....}
confirm transaction before signing and broadcasting [y/N]: y
```

#### Queries

**`query bank balances [address]` - Check the balance of a specified account**

One can check the current balance of a specified account by:

```json
$ chain-maind query bank balances <address> --output json | jq
    {
    "balances": [
        {
        "denom": "basecro",
        "amount": "[token_balance]"
        }
    ],
    "pagination": {
        "next_key": null,
        "total": "0"
    }
    }
```

**`query bank total` - Check the total supply of the token**

You can also check the current total supply of the token by:

```json
$ chain-maind query bank total --output json | jq
    {
    "supply": [
        {
        "denom": "basecro",
        "amount": "[total_supply_amount]"
        }
    ]
    }
```

#### Appendix

**`bank` module: Network Parameters and configuration**

| Key                  | Type           | Example                               |
| -------------------- | -------------- | ------------------------------------- |
| `SendEnabled`        | \[]SendEnabled | \[{denom: "basecro", enabled: true }] |
| `DefaultSendEnabled` | bool           | true                                  |