COSMOSSDK BANK模块中文文档

djan
更新于 2024-07-28 17:06
阅读 448

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---
sidebar_position: 1
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# `x/bank`

## 摘要

本文档对Cosmos SDK的bank模块进行说明。

bank模块负责账户间的各种代币资产转账以及追踪特殊情况下必须以不同方式工作的特殊账号的伪转账（特别是vesting账户的代理/取消代理）。此模块暴露了几个不同权限的接口用于安全地与其他模块进行那些必须改变用户余额的交互。

另外，银行模块追踪并可以查询所有资产的总供应量。

此模块也被应用于Cosmos Hub中。

## 内容

* [代币供应](#supply)
    * [总供应量](#total-supply)
* [Module Accounts](#module-accounts)
    * [Permissions](#permissions)
* [State](#state)
* [Params](#params)
* [Keepers](#keepers)
* [Messages](#messages)
* [Events](#events)
    * [Message Events](#message-events)
    * [Keeper Events](#keeper-events)
* [Parameters](#parameters)
    * [SendEnabled](#sendenabled)
    * [DefaultSendEnabled](#defaultsendenabled)
* [Client](#client)
    * [CLI](#cli)
    * [Query](#query)
    * [Transactions](#transactions)
* [gRPC](#grpc)

## 代币供应

代币供应`supply`功能：

* 被动追踪链上所有代币的总供应量，
* 为所有模块提供了持有/操作代币的模式，并且
* 引入了不变量检查来验证链上的代币总供应量。

### 总供应量

网络的总供应量等于账户的所有代币总和。总供应量会随着代币`Coin`的铸造（比如使用铸造从技术上实现通胀）和燃烧（由于被惩罚或者治理模块被废弃时造成的燃烧）实时更新。

## 模块账户

代币供应功能性地引入了一个新的类型`auth.Account`，被模块用来分配代币以及特殊应用场景下铸造或燃烧代币。这些模块账户能够彼此发送和接收代币。这个设计取代了之前的设计——模块需要接收代币时，需要将发送者的代币燃烧掉，需要发送代币时，再在目标账户内铸造出新的代币。这个新设计移除了模块间的重复逻辑。

模块账户`ModuleAccount`接口定义如下：

```go
type ModuleAccount interface {
  auth.Account               // same methods as the Account interface

GetName() string           // name of the module; used to obtain the address
  GetPermissions() []string  // permissions of module account
  HasPermission(string) bool
}
```

> **注意!**
> 任何允许直接或间接发送资金的模块或者消息处理函数必须确保这些资金不能发送到模块账户（除非是有意为之）

为了以下目的，代币供应的`Keeper`也为auth模块的`Keeper`和bank模块的`Keeper`引入了和模块账户`ModuleAccount`有关的新的包装函数：

* 根据提供的`Name`获取或设置模块账户`ModuleAccount`.
* 只通过`Name`就可以接收和发送代币到别的模块账户`ModuleAccount`或者标准账户`Account`（`BaseAccount`或者`VestingAccount`）
* 为模块账户`ModuleAccount`铸造`Mint`或烧毁`Burn`代币（受权限限制）。

### 权限

每个模块账户`ModuleAccount`都有一套不同的权限来提供不同的能力去执行特定的动作。权限需要在创建代币供应`Keeper`时注册以便每次`ModuleAccount`调用授权函数时查询，`Keeper`能查够查询具体账户的权限来决定是否执行该动作。

可用的权限有以下三个：

* `Minter`：允许模块铸造具体数量的代币。
* `Burner`: 允许模块烧毁具体数量的代币。
* `Staking`: 允许模块代理或取消代理具体数量的代币。

## 状态

`x/bank`模块主要拥有以下几个对象的状态：

1. 账户余额
2. 代币的元信息
3. 代币的总供应量
4. 代币转账信息

另外，`x/bank`模块拥有下列索引用来管理上述状态：

## 参数

银行模块以`0x05`为前缀把自己的参数存储在状态中，通过治理模块或者权威账户地址可以更改这些参数。

* 参数：`0x05 | ProtocolBuffer(Params)`

```protobuf reference
https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/bank.proto#L12-L23
```

## Keepers

银行模块提供暴露了有一些keeper接口，可以传递给其他模块以便读取或者更改账户的余额。
其他模块应当按需引入这些接口，避免滥用。

在实际生产中需要仔细阅读`bank`模块的代码以确保权限限制规则是符合你预期的。

### 禁用账户地址

`x/bank`模块可以接受一个账户地址的字典作为黑名单，可以禁止这些账户地址通过`MsgSend`，`MsgMultiSend`以及像`SendCoinsFromModuleToAccount`直接调用的api来接收代币。

典型的，这些地址为模块账户地址。如果这些地址以状态机规则以外的方式接接收资金，不变量可能会受到破坏，这将可能导致网络宕机。

`x/bank`提供了一个地址的黑名单，如果向黑名单内的地址发送资金会发生错误，例如，使用[IBC](https://ibc.cosmos.network).

### 通用类型

#### Input

多方转账交易的输入。

```protobuf
// Input models transaction input.
message Input {
  string   address                        = 1;
  repeated cosmos.base.v1beta1.Coin coins = 2;
}
```

#### Output

多方转账交易的输出。

```protobuf
// Output models transaction outputs.
message Output {
  string   address                        = 1;
  repeated cosmos.base.v1beta1.Coin coins = 2;
}
```

### BaseKeeper

基础keeper提供了所有的权限，可以任意更改账户的余额，铸造代币或是销毁代币。

要限制每个模块铸造代币的权限，可以通过baseKeeper的`WithMintCoinsRestriction` 来给予具体的铸造限制（例如：只能铸造特定的代币）。

```go
// Keeper defines a module interface that facilitates the transfer of coins
// between accounts.
type Keeper interface {
    SendKeeper
    WithMintCoinsRestriction(MintingRestrictionFn) BaseKeeper

InitGenesis(context.Context, *types.GenesisState)
    ExportGenesis(context.Context) *types.GenesisState

GetSupply(ctx context.Context, denom string) sdk.Coin
    HasSupply(ctx context.Context, denom string) bool
    GetPaginatedTotalSupply(ctx context.Context, pagination *query.PageRequest) (sdk.Coins, *query.PageResponse, error)
    IterateTotalSupply(ctx context.Context, cb func(sdk.Coin) bool)
    GetDenomMetaData(ctx context.Context, denom string) (types.Metadata, bool)
    HasDenomMetaData(ctx context.Context, denom string) bool
    SetDenomMetaData(ctx context.Context, denomMetaData types.Metadata)
    IterateAllDenomMetaData(ctx context.Context, cb func(types.Metadata) bool)

SendCoinsFromModuleToAccount(ctx context.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins) error
    SendCoinsFromModuleToModule(ctx context.Context, senderModule, recipientModule string, amt sdk.Coins) error
    SendCoinsFromAccountToModule(ctx context.Context, senderAddr sdk.AccAddress, recipientModule string, amt sdk.Coins) error
    DelegateCoinsFromAccountToModule(ctx context.Context, senderAddr sdk.AccAddress, recipientModule string, amt sdk.Coins) error
    UndelegateCoinsFromModuleToAccount(ctx context.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins) error
    MintCoins(ctx context.Context, moduleName string, amt sdk.Coins) error
    BurnCoins(ctx context.Context, moduleName string, amt sdk.Coins) error

DelegateCoins(ctx context.Context, delegatorAddr, moduleAccAddr sdk.AccAddress, amt sdk.Coins) error
    UndelegateCoins(ctx context.Context, moduleAccAddr, delegatorAddr sdk.AccAddress, amt sdk.Coins) error

// GetAuthority gets the address capable of executing governance proposal messages. Usually the gov module account.
    GetAuthority() string

types.QueryServer
}
```

### SendKeeper

send keeper提供了访问账户并在账户间转账的权限。send keeper不会改变代币的总供应量（不涉及铸造或销毁代币）。

```go
// SendKeeper defines a module interface that facilitates the transfer of coins
// between accounts without the possibility of creating coins.
type SendKeeper interface {
    ViewKeeper

AppendSendRestriction(restriction SendRestrictionFn)
    PrependSendRestriction(restriction SendRestrictionFn)
    ClearSendRestriction()

InputOutputCoins(ctx context.Context, input types.Input, outputs []types.Output) error
    SendCoins(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) error

GetParams(ctx context.Context) types.Params
    SetParams(ctx context.Context, params types.Params) error

IsSendEnabledDenom(ctx context.Context, denom string) bool
    SetSendEnabled(ctx context.Context, denom string, value bool)
    SetAllSendEnabled(ctx context.Context, sendEnableds []*types.SendEnabled)
    DeleteSendEnabled(ctx context.Context, denom string)
    IterateSendEnabledEntries(ctx context.Context, cb func(denom string, sendEnabled bool) (stop bool))
    GetAllSendEnabledEntries(ctx context.Context) []types.SendEnabled

IsSendEnabledCoin(ctx context.Context, coin sdk.Coin) bool
    IsSendEnabledCoins(ctx context.Context, coins ...sdk.Coin) error

BlockedAddr(addr sdk.AccAddress) bool
}
```

#### Send Restrictions

`SendKeeper`在转账前会执行`SendRestrictionFn`函数。

```golang
// 一个SendRestrictionFn可以限制和/或提供一个新的接收地址。
type SendRestrictionFn func(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) (newToAddr sdk.AccAddress, err error)
```

在`SendKeeper`（或`BaseKeeper`）创建之后，可以通过`AppendSendRestriction`或者`PrependSendRestriction`函数来添加转账限制。
两个函数和之前已提供的限制共同组成了转账限制。`AppendSendRestriction`添加的限制条件会在之前的条件执行后再执行。
`PrependSendRestriction`添加的条件会在之前的条件执行前先执行。这些限制条件在发生错误时会依照短路逻辑处理，例如如果第一个条件返回了一个错误，则第二个条件不会执行。

在`SendCoins`期间，限制条件会在代币从转账账户扣除以及添加到被转账账户之前执行。
在`InputOutputCoins`期间，限制条件会在代币从转账账户扣除以及添加到被转账账户之后执行。

A send restriction function should make use of a custom value in the context to allow bypassing that specific restriction.
一个转账限制函数

Send Restrictions are not placed on `ModuleToAccount` or `ModuleToModule` transfers. This is done due to modules needing to move funds to user accounts and other module accounts. This is a design decision to allow for more flexibility in the state machine. The state machine should be able to move funds between module accounts and user accounts without restrictions.

Secondly this limitation would limit the usage of the state machine even for itself. users would not be able to receive rewards, not be able to move funds between module accounts. In the case that a user sends funds from a user account to the community pool and then a governance proposal is used to get those tokens into the users account this would fall under the discretion of the app chain developer to what they would like to do here. We can not make strong assumptions here.
Thirdly, this issue could lead into a chain halt if a token is disabled and the token is moved in the begin/endblock. This is the last reason we see the current change and more damaging then beneficial for users.

For example, in your module's keeper package, you'd define the send restriction function:

```golang
var _ banktypes.SendRestrictionFn = Keeper{}.SendRestrictionFn

func (k Keeper) SendRestrictionFn(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) (sdk.AccAddress, error) {
	// Bypass if the context says to.
	if mymodule.HasBypass(ctx) {
		return toAddr, nil
	}

// Your custom send restriction logic goes here.
	return nil, errors.New("not implemented")
}
```

The bank keeper should be provided to your keeper's constructor so the send restriction can be added to it:

```golang
func NewKeeper(cdc codec.BinaryCodec, storeKey storetypes.StoreKey, bankKeeper mymodule.BankKeeper) Keeper {
	rv := Keeper{/*...*/}
	bankKeeper.AppendSendRestriction(rv.SendRestrictionFn)
	return rv
}
```

Then, in the `mymodule` package, define the context helpers:

```golang
const bypassKey = "bypass-mymodule-restriction"

// WithBypass returns a new context that will cause the mymodule bank send restriction to be skipped.
func WithBypass(ctx context.Context) context.Context {
	return sdk.UnwrapSDKContext(ctx).WithValue(bypassKey, true)
}

// WithoutBypass returns a new context that will cause the mymodule bank send restriction to not be skipped.
func WithoutBypass(ctx context.Context) context.Context {
	return sdk.UnwrapSDKContext(ctx).WithValue(bypassKey, false)
}

// HasBypass checks the context to see if the mymodule bank send restriction should be skipped.
func HasBypass(ctx context.Context) bool {
	bypassValue := ctx.Value(bypassKey)
	if bypassValue == nil {
		return false
	}
	bypass, isBool := bypassValue.(bool)
	return isBool && bypass
}
```

Now, anywhere where you want to use `SendCoins` or `InputOutputCoins`, but you don't want your send restriction applied:

```golang
func (k Keeper) DoThing(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) error {
	return k.bankKeeper.SendCoins(mymodule.WithBypass(ctx), fromAddr, toAddr, amt)
}
```

### ViewKeeper

The view keeper provides read-only access to account balances. The view keeper does not have balance alteration functionality. All balance lookups are `O(1)`.

```go
// ViewKeeper defines a module interface that facilitates read only access to
// account balances.
type ViewKeeper interface {
    ValidateBalance(ctx context.Context, addr sdk.AccAddress) error
    HasBalance(ctx context.Context, addr sdk.AccAddress, amt sdk.Coin) bool

GetAllBalances(ctx context.Context, addr sdk.AccAddress) sdk.Coins
    GetAccountsBalances(ctx context.Context) []types.Balance
    GetBalance(ctx context.Context, addr sdk.AccAddress, denom string) sdk.Coin
    LockedCoins(ctx context.Context, addr sdk.AccAddress) sdk.Coins
    SpendableCoins(ctx context.Context, addr sdk.AccAddress) sdk.Coins
    SpendableCoin(ctx context.Context, addr sdk.AccAddress, denom string) sdk.Coin

IterateAccountBalances(ctx context.Context, addr sdk.AccAddress, cb func(coin sdk.Coin) (stop bool))
    IterateAllBalances(ctx context.Context, cb func(address sdk.AccAddress, coin sdk.Coin) (stop bool))
}
```

## Messages

### MsgSend

Send coins from one address to another.

```protobuf reference
https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L38-L53
```

The message will fail under the following conditions:

* The coins do not have sending enabled
* The `to` address is restricted

### MsgMultiSend

Send coins from one sender and to a series of different address. If any of the receiving addresses do not correspond to an existing account, a new account is created.

```protobuf reference
https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L58-L69
```

The message will fail under the following conditions:

* Any of the coins do not have sending enabled
* Any of the `to` addresses are restricted
* Any of the coins are locked
* The inputs and outputs do not correctly correspond to one another

### MsgUpdateParams

The `bank` module params can be updated through `MsgUpdateParams`, which can be done using governance proposal. The signer will always be the `gov` module account address.

```protobuf reference
https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L74-L88
```

The message handling can fail if:

* signer is not the gov module account address.

### MsgSetSendEnabled

Used with the x/gov module to set create/edit SendEnabled entries.

```protobuf reference
https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L96-L117
```

The message will fail under the following conditions:

* The authority is not a decodable address.
* The authority is not x/gov module's address.
* There are multiple SendEnabled entries with the same Denom.
* One or more SendEnabled entries has an invalid Denom.

### MsgBurn

Used to burn coins from an account. The coins are removed from the account and the total supply is reduced.

```protobuf reference
https://github.com/cosmos/cosmos-sdk/blob/1af000b3ef6296f9928caf494fe5bb812990f22d/proto/cosmos/bank/v1beta1/tx.proto#L131-L148
```

This message will fail under the following conditions:

* The signer is not present
* The coins are not spendable
* The coins are not positive
* The coins are not valid

## Events

The bank module emits the following events:

### Message Events

#### MsgSend

| Type     | Attribute Key | Attribute Value    |
| -------- | ------------- | ------------------ |
| transfer | recipient     | {recipientAddress} |
| transfer | amount        | {amount}           |
| message  | module        | bank               |
| message  | action        | send               |
| message  | sender        | {senderAddress}    |

#### MsgMultiSend

| Type     | Attribute Key | Attribute Value    |
| -------- | ------------- | ------------------ |
| transfer | recipient     | {recipientAddress} |
| transfer | amount        | {amount}           |
| message  | module        | bank               |
| message  | action        | multisend          |
| message  | sender        | {senderAddress}    |

### Keeper Events

In addition to message events, the bank keeper will produce events when the following methods are called (or any method which ends up calling them)

#### MintCoins

```json
{
  "type": "coinbase",
  "attributes": [
    {
      "key": "minter",
      "value": "{{sdk.AccAddress of the module minting coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being minted}}",
      "index": true
    }
  ]
}
```

```json
{
  "type": "coin_received",
  "attributes": [
    {
      "key": "receiver",
      "value": "{{sdk.AccAddress of the module minting coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being received}}",
      "index": true
    }
  ]
}
```

#### BurnCoins

```json
{
  "type": "burn",
  "attributes": [
    {
      "key": "burner",
      "value": "{{sdk.AccAddress of the module burning coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being burned}}",
      "index": true
    }
  ]
}
```

```json
{
  "type": "coin_spent",
  "attributes": [
    {
      "key": "spender",
      "value": "{{sdk.AccAddress of the module burning coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being burned}}",
      "index": true
    }
  ]
}
```

#### addCoins

```json
{
  "type": "coin_received",
  "attributes": [
    {
      "key": "receiver",
      "value": "{{sdk.AccAddress of the address beneficiary of the coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being received}}",
      "index": true
    }
  ]
}
```

#### subUnlockedCoins/DelegateCoins

```json
{
  "type": "coin_spent",
  "attributes": [
    {
      "key": "spender",
      "value": "{{sdk.AccAddress of the address which is spending coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being spent}}",
      "index": true
    }
  ]
}
```

## Parameters

The bank module contains the following parameters

### SendEnabled

The SendEnabled parameter is now deprecated and not to be use. It is replaced
with state store records.

### DefaultSendEnabled

The default send enabled value controls send transfer capability for all
coin denominations unless specifically included in the array of `SendEnabled`
parameters.

## Client

### CLI

A user can query and interact with the `bank` module using the CLI.

#### Query

The `query` commands allow users to query `bank` state.

```shell
simd query bank --help
```

##### balances

The `balances` command allows users to query account balances by address.

```shell
simd query bank balances [address] [flags]
```

Example:

```shell
simd query bank balances cosmos1..
```

Example Output:

```yml
balances:
- amount: "1000000000"
  denom: stake
pagination:
  next_key: null
  total: "0"
```

##### denom-metadata

The `denom-metadata` command allows users to query metadata for coin denominations. A user can query metadata for a single denomination using the `--denom` flag or all denominations without it.

```shell
simd query bank denom-metadata [flags]
```

Example:

```shell
simd query bank denom-metadata --denom stake
```

Example Output:

```yml
metadata:
  base: stake
  denom_units:
  - aliases:
    - STAKE
    denom: stake
  description: native staking token of simulation app
  display: stake
  name: SimApp Token
  symbol: STK
```

##### total

The `total` command allows users to query the total supply of coins. A user can query the total supply for a single coin using the `--denom` flag or all coins without it.

```shell
simd query bank total [flags]
```

Example:

```shell
simd query bank total --denom stake
```

Example Output:

```yml
amount: "10000000000"
denom: stake
```

##### send-enabled

The `send-enabled` command allows users to query for all or some SendEnabled entries.

```shell
simd query bank send-enabled [denom1 ...] [flags]
```

Example:

```shell
simd query bank send-enabled
```

Example output:

```yml
send_enabled:
- denom: foocoin
  enabled: true
- denom: barcoin
pagination:
  next-key: null
  total: 2 
```

#### Transactions

The `tx` commands allow users to interact with the `bank` module.

```shell
simd tx bank --help
```

##### send

The `send` command allows users to send funds from one account to another.

```shell
simd tx bank send [from_key_or_address] [to_address] [amount] [flags]
```

Example:

```shell
simd tx bank send cosmos1.. cosmos1.. 100stake
```

## gRPC

A user can query the `bank` module using gRPC endpoints.

### Balance

The `Balance` endpoint allows users to query account balance by address for a given denomination.

```shell
cosmos.bank.v1beta1.Query/Balance
```

Example:

```shell
grpcurl -plaintext \
    -d '{"address":"cosmos1..","denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/Balance
```

Example Output:

```json
{
  "balance": {
    "denom": "stake",
    "amount": "1000000000"
  }
}
```

### AllBalances

The `AllBalances` endpoint allows users to query account balance by address for all denominations.

```shell
cosmos.bank.v1beta1.Query/AllBalances
```

Example:

```shell
grpcurl -plaintext \
    -d '{"address":"cosmos1.."}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/AllBalances
```

Example Output:

```json
{
  "balances": [
    {
      "denom": "stake",
      "amount": "1000000000"
    }
  ],
  "pagination": {
    "total": "1"
  }
}
```

### DenomMetadata

The `DenomMetadata` endpoint allows users to query metadata for a single coin denomination.

```shell
cosmos.bank.v1beta1.Query/DenomMetadata
```

Example:

```shell
grpcurl -plaintext \
    -d '{"denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/DenomMetadata
```

Example Output:

```json
{
  "metadata": {
    "description": "native staking token of simulation app",
    "denomUnits": [
      {
        "denom": "stake",
        "aliases": [
          "STAKE"
        ]
      }
    ],
    "base": "stake",
    "display": "stake",
    "name": "SimApp Token",
    "symbol": "STK"
  }
}
```

### DenomsMetadata

The `DenomsMetadata` endpoint allows users to query metadata for all coin denominations.

```shell
cosmos.bank.v1beta1.Query/DenomsMetadata
```

Example:

```shell
grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/DenomsMetadata
```

Example Output:

```json
{
  "metadatas": [
    {
      "description": "native staking token of simulation app",
      "denomUnits": [
        {
          "denom": "stake",
          "aliases": [
            "STAKE"
          ]
        }
      ],
      "base": "stake",
      "display": "stake",
      "name": "SimApp Token",
      "symbol": "STK"
    }
  ],
  "pagination": {
    "total": "1"
  }
}
```

### DenomOwners

The `DenomOwners` endpoint allows users to query metadata for a single coin denomination.

```shell
cosmos.bank.v1beta1.Query/DenomOwners
```

Example:

```shell
grpcurl -plaintext \
    -d '{"denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/DenomOwners
```

Example Output:

```json
{
  "denomOwners": [
    {
      "address": "cosmos1..",
      "balance": {
        "denom": "stake",
        "amount": "5000000000"
      }
    },
    {
      "address": "cosmos1..",
      "balance": {
        "denom": "stake",
        "amount": "5000000000"
      }
    },
  ],
  "pagination": {
    "total": "2"
  }
}
```

### TotalSupply

The `TotalSupply` endpoint allows users to query the total supply of all coins.

```shell
cosmos.bank.v1beta1.Query/TotalSupply
```

Example:

```shell
grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/TotalSupply
```

Example Output:

```json
{
  "supply": [
    {
      "denom": "stake",
      "amount": "10000000000"
    }
  ],
  "pagination": {
    "total": "1"
  }
}
```

### SupplyOf

The `SupplyOf` endpoint allows users to query the total supply of a single coin.

```shell
cosmos.bank.v1beta1.Query/SupplyOf
```

Example:

```shell
grpcurl -plaintext \
    -d '{"denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/SupplyOf
```

Example Output:

```json
{
  "amount": {
    "denom": "stake",
    "amount": "10000000000"
  }
}
```

### Params

The `Params` endpoint allows users to query the parameters of the `bank` module.

```shell
cosmos.bank.v1beta1.Query/Params
```

Example:

```shell
grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/Params
```

Example Output:

```json
{
  "params": {
    "defaultSendEnabled": true
  }
}
```

### SendEnabled

The `SendEnabled` endpoints allows users to query the SendEnabled entries of the `bank` module.

Any denominations NOT returned, use the `Params.DefaultSendEnabled` value.

```shell
cosmos.bank.v1beta1.Query/SendEnabled
```

Example:

```shell
grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/SendEnabled
```

Example Output:

```json
{
  "send_enabled": [
    {
      "denom": "foocoin",
      "enabled": true
    },
    {
      "denom": "barcoin"
    }
  ],
  "pagination": {
    "next-key": null,
    "total": 2
  }
}
```

sidebar_position: 1

`x/bank`

摘要

本文档对Cosmos SDK的bank模块进行说明。

另外，银行模块追踪并可以查询所有资产的总供应量。

此模块也被应用于Cosmos Hub中。

内容

代币供应
- 总供应量
Module Accounts
- Permissions
State
Params
Keepers
Messages
Events
- Message Events
- Keeper Events
Parameters
- SendEnabled
- DefaultSendEnabled
Client
- CLI
- Query
- Transactions
gRPC

代币供应

代币供应supply功能：

被动追踪链上所有代币的总供应量，
为所有模块提供了持有/操作代币的模式，并且
引入了不变量检查来验证链上的代币总供应量。

总供应量

网络的总供应量等于账户的所有代币总和。总供应量会随着代币Coin的铸造（比如使用铸造从技术上实现通胀）和燃烧（由于被惩罚或者治理模块被废弃时造成的燃烧）实时更新。

模块账户

代币供应功能性地引入了一个新的类型auth.Account，被模块用来分配代币以及特殊应用场景下铸造或燃烧代币。这些模块账户能够彼此发送和接收代币。这个设计取代了之前的设计——模块需要接收代币时，需要将发送者的代币燃烧掉，需要发送代币时，再在目标账户内铸造出新的代币。这个新设计移除了模块间的重复逻辑。

模块账户ModuleAccount接口定义如下：

type ModuleAccount interface {
  auth.Account               // same methods as the Account interface

  GetName() string           // name of the module; used to obtain the address
  GetPermissions() []string  // permissions of module account
  HasPermission(string) bool
}

注意! 任何允许直接或间接发送资金的模块或者消息处理函数必须确保这些资金不能发送到模块账户（除非是有意为之）

为了以下目的，代币供应的Keeper也为auth模块的Keeper和bank模块的Keeper引入了和模块账户ModuleAccount有关的新的包装函数：

根据提供的Name获取或设置模块账户ModuleAccount.
只通过Name就可以接收和发送代币到别的模块账户ModuleAccount或者标准账户Account（BaseAccount或者VestingAccount）
为模块账户ModuleAccount铸造Mint或烧毁Burn代币（受权限限制）。

权限

每个模块账户ModuleAccount都有一套不同的权限来提供不同的能力去执行特定的动作。权限需要在创建代币供应Keeper时注册以便每次ModuleAccount调用授权函数时查询，Keeper能查够查询具体账户的权限来决定是否执行该动作。

可用的权限有以下三个：

Minter：允许模块铸造具体数量的代币。
Burner: 允许模块烧毁具体数量的代币。
Staking: 允许模块代理或取消代理具体数量的代币。

状态

x/bank模块主要拥有以下几个对象的状态：

账户余额
代币的元信息
代币的总供应量
代币转账信息

另外，x/bank模块拥有下列索引用来管理上述状态：

代币供应索引: 0x0 | byte(denom) -> byte(amount)
代币元数据索引：0x1 | byte(denom) -> ProtocolBuffer(Metadata)
余额索引：0x2 | byte(address length) | []byte(address) | []byte(balance.Denom) -> ProtocolBuffer(balance)
代币->账户地址索引：0x03 | byte(denom) | 0x00 | []byte(address) -> 0

参数

银行模块以0x05为前缀把自己的参数存储在状态中，通过治理模块或者权威账户地址可以更改这些参数。

参数：0x05 | ProtocolBuffer(Params)

https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/bank.proto#L12-L23

Keepers

银行模块提供暴露了有一些keeper接口，可以传递给其他模块以便读取或者更改账户的余额。其他模块应当按需引入这些接口，避免滥用。

在实际生产中需要仔细阅读bank模块的代码以确保权限限制规则是符合你预期的。

禁用账户地址

x/bank模块可以接受一个账户地址的字典作为黑名单，可以禁止这些账户地址通过MsgSend，MsgMultiSend以及像SendCoinsFromModuleToAccount直接调用的api来接收代币。

典型的，这些地址为模块账户地址。如果这些地址以状态机规则以外的方式接接收资金，不变量可能会受到破坏，这将可能导致网络宕机。

x/bank提供了一个地址的黑名单，如果向黑名单内的地址发送资金会发生错误，例如，使用IBC.

通用类型

Input

多方转账交易的输入。

// Input models transaction input.
message Input {
  string   address                        = 1;
  repeated cosmos.base.v1beta1.Coin coins = 2;
}

Output

多方转账交易的输出。

// Output models transaction outputs.
message Output {
  string   address                        = 1;
  repeated cosmos.base.v1beta1.Coin coins = 2;
}

BaseKeeper

基础keeper提供了所有的权限，可以任意更改账户的余额，铸造代币或是销毁代币。

要限制每个模块铸造代币的权限，可以通过baseKeeper的WithMintCoinsRestriction 来给予具体的铸造限制（例如：只能铸造特定的代币）。

// Keeper defines a module interface that facilitates the transfer of coins
// between accounts.
type Keeper interface {
    SendKeeper
    WithMintCoinsRestriction(MintingRestrictionFn) BaseKeeper

    InitGenesis(context.Context, *types.GenesisState)
    ExportGenesis(context.Context) *types.GenesisState

    GetSupply(ctx context.Context, denom string) sdk.Coin
    HasSupply(ctx context.Context, denom string) bool
    GetPaginatedTotalSupply(ctx context.Context, pagination *query.PageRequest) (sdk.Coins, *query.PageResponse, error)
    IterateTotalSupply(ctx context.Context, cb func(sdk.Coin) bool)
    GetDenomMetaData(ctx context.Context, denom string) (types.Metadata, bool)
    HasDenomMetaData(ctx context.Context, denom string) bool
    SetDenomMetaData(ctx context.Context, denomMetaData types.Metadata)
    IterateAllDenomMetaData(ctx context.Context, cb func(types.Metadata) bool)

    SendCoinsFromModuleToAccount(ctx context.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins) error
    SendCoinsFromModuleToModule(ctx context.Context, senderModule, recipientModule string, amt sdk.Coins) error
    SendCoinsFromAccountToModule(ctx context.Context, senderAddr sdk.AccAddress, recipientModule string, amt sdk.Coins) error
    DelegateCoinsFromAccountToModule(ctx context.Context, senderAddr sdk.AccAddress, recipientModule string, amt sdk.Coins) error
    UndelegateCoinsFromModuleToAccount(ctx context.Context, senderModule string, recipientAddr sdk.AccAddress, amt sdk.Coins) error
    MintCoins(ctx context.Context, moduleName string, amt sdk.Coins) error
    BurnCoins(ctx context.Context, moduleName string, amt sdk.Coins) error

    DelegateCoins(ctx context.Context, delegatorAddr, moduleAccAddr sdk.AccAddress, amt sdk.Coins) error
    UndelegateCoins(ctx context.Context, moduleAccAddr, delegatorAddr sdk.AccAddress, amt sdk.Coins) error

    // GetAuthority gets the address capable of executing governance proposal messages. Usually the gov module account.
    GetAuthority() string

    types.QueryServer
}

SendKeeper

send keeper提供了访问账户并在账户间转账的权限。send keeper不会改变代币的总供应量（不涉及铸造或销毁代币）。

// SendKeeper defines a module interface that facilitates the transfer of coins
// between accounts without the possibility of creating coins.
type SendKeeper interface {
    ViewKeeper

    AppendSendRestriction(restriction SendRestrictionFn)
    PrependSendRestriction(restriction SendRestrictionFn)
    ClearSendRestriction()

    InputOutputCoins(ctx context.Context, input types.Input, outputs []types.Output) error
    SendCoins(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) error

    GetParams(ctx context.Context) types.Params
    SetParams(ctx context.Context, params types.Params) error

    IsSendEnabledDenom(ctx context.Context, denom string) bool
    SetSendEnabled(ctx context.Context, denom string, value bool)
    SetAllSendEnabled(ctx context.Context, sendEnableds []*types.SendEnabled)
    DeleteSendEnabled(ctx context.Context, denom string)
    IterateSendEnabledEntries(ctx context.Context, cb func(denom string, sendEnabled bool) (stop bool))
    GetAllSendEnabledEntries(ctx context.Context) []types.SendEnabled

    IsSendEnabledCoin(ctx context.Context, coin sdk.Coin) bool
    IsSendEnabledCoins(ctx context.Context, coins ...sdk.Coin) error

    BlockedAddr(addr sdk.AccAddress) bool
}

Send Restrictions

SendKeeper在转账前会执行SendRestrictionFn函数。

// 一个SendRestrictionFn可以限制和/或提供一个新的接收地址。
type SendRestrictionFn func(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) (newToAddr sdk.AccAddress, err error)

在SendKeeper（或BaseKeeper）创建之后，可以通过AppendSendRestriction或者PrependSendRestriction函数来添加转账限制。两个函数和之前已提供的限制共同组成了转账限制。AppendSendRestriction添加的限制条件会在之前的条件执行后再执行。 PrependSendRestriction添加的条件会在之前的条件执行前先执行。这些限制条件在发生错误时会依照短路逻辑处理，例如如果第一个条件返回了一个错误，则第二个条件不会执行。

在SendCoins期间，限制条件会在代币从转账账户扣除以及添加到被转账账户之前执行。在InputOutputCoins期间，限制条件会在代币从转账账户扣除以及添加到被转账账户之后执行。

A send restriction function should make use of a custom value in the context to allow bypassing that specific restriction. 一个转账限制函数

Send Restrictions are not placed on ModuleToAccount or ModuleToModule transfers. This is done due to modules needing to move funds to user accounts and other module accounts. This is a design decision to allow for more flexibility in the state machine. The state machine should be able to move funds between module accounts and user accounts without restrictions.

Secondly this limitation would limit the usage of the state machine even for itself. users would not be able to receive rewards, not be able to move funds between module accounts. In the case that a user sends funds from a user account to the community pool and then a governance proposal is used to get those tokens into the users account this would fall under the discretion of the app chain developer to what they would like to do here. We can not make strong assumptions here. Thirdly, this issue could lead into a chain halt if a token is disabled and the token is moved in the begin/endblock. This is the last reason we see the current change and more damaging then beneficial for users.

For example, in your module's keeper package, you'd define the send restriction function:

var _ banktypes.SendRestrictionFn = Keeper{}.SendRestrictionFn

func (k Keeper) SendRestrictionFn(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) (sdk.AccAddress, error) {
    // Bypass if the context says to.
    if mymodule.HasBypass(ctx) {
        return toAddr, nil
    }

    // Your custom send restriction logic goes here.
    return nil, errors.New("not implemented")
}

The bank keeper should be provided to your keeper's constructor so the send restriction can be added to it:

func NewKeeper(cdc codec.BinaryCodec, storeKey storetypes.StoreKey, bankKeeper mymodule.BankKeeper) Keeper {
    rv := Keeper{/*...*/}
    bankKeeper.AppendSendRestriction(rv.SendRestrictionFn)
    return rv
}

Then, in the mymodule package, define the context helpers:

const bypassKey = "bypass-mymodule-restriction"

// WithBypass returns a new context that will cause the mymodule bank send restriction to be skipped.
func WithBypass(ctx context.Context) context.Context {
    return sdk.UnwrapSDKContext(ctx).WithValue(bypassKey, true)
}

// WithoutBypass returns a new context that will cause the mymodule bank send restriction to not be skipped.
func WithoutBypass(ctx context.Context) context.Context {
    return sdk.UnwrapSDKContext(ctx).WithValue(bypassKey, false)
}

// HasBypass checks the context to see if the mymodule bank send restriction should be skipped.
func HasBypass(ctx context.Context) bool {
    bypassValue := ctx.Value(bypassKey)
    if bypassValue == nil {
        return false
    }
    bypass, isBool := bypassValue.(bool)
    return isBool && bypass
}

Now, anywhere where you want to use SendCoins or InputOutputCoins, but you don't want your send restriction applied:

func (k Keeper) DoThing(ctx context.Context, fromAddr, toAddr sdk.AccAddress, amt sdk.Coins) error {
    return k.bankKeeper.SendCoins(mymodule.WithBypass(ctx), fromAddr, toAddr, amt)
}

ViewKeeper

The view keeper provides read-only access to account balances. The view keeper does not have balance alteration functionality. All balance lookups are O(1).

// ViewKeeper defines a module interface that facilitates read only access to
// account balances.
type ViewKeeper interface {
    ValidateBalance(ctx context.Context, addr sdk.AccAddress) error
    HasBalance(ctx context.Context, addr sdk.AccAddress, amt sdk.Coin) bool

    GetAllBalances(ctx context.Context, addr sdk.AccAddress) sdk.Coins
    GetAccountsBalances(ctx context.Context) []types.Balance
    GetBalance(ctx context.Context, addr sdk.AccAddress, denom string) sdk.Coin
    LockedCoins(ctx context.Context, addr sdk.AccAddress) sdk.Coins
    SpendableCoins(ctx context.Context, addr sdk.AccAddress) sdk.Coins
    SpendableCoin(ctx context.Context, addr sdk.AccAddress, denom string) sdk.Coin

    IterateAccountBalances(ctx context.Context, addr sdk.AccAddress, cb func(coin sdk.Coin) (stop bool))
    IterateAllBalances(ctx context.Context, cb func(address sdk.AccAddress, coin sdk.Coin) (stop bool))
}

Messages

MsgSend

Send coins from one address to another.

https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L38-L53

The message will fail under the following conditions:

The coins do not have sending enabled
The to address is restricted

MsgMultiSend

Send coins from one sender and to a series of different address. If any of the receiving addresses do not correspond to an existing account, a new account is created.

https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L58-L69

The message will fail under the following conditions:

Any of the coins do not have sending enabled
Any of the to addresses are restricted
Any of the coins are locked
The inputs and outputs do not correctly correspond to one another

MsgUpdateParams

The bank module params can be updated through MsgUpdateParams, which can be done using governance proposal. The signer will always be the gov module account address.

https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L74-L88

The message handling can fail if:

signer is not the gov module account address.

MsgSetSendEnabled

Used with the x/gov module to set create/edit SendEnabled entries.

https://github.com/cosmos/cosmos-sdk/blob/v0.47.0-rc1/proto/cosmos/bank/v1beta1/tx.proto#L96-L117

The message will fail under the following conditions:

The authority is not a decodable address.
The authority is not x/gov module's address.
There are multiple SendEnabled entries with the same Denom.
One or more SendEnabled entries has an invalid Denom.

MsgBurn

Used to burn coins from an account. The coins are removed from the account and the total supply is reduced.

https://github.com/cosmos/cosmos-sdk/blob/1af000b3ef6296f9928caf494fe5bb812990f22d/proto/cosmos/bank/v1beta1/tx.proto#L131-L148

This message will fail under the following conditions:

The signer is not present
The coins are not spendable
The coins are not positive
The coins are not valid

Events

The bank module emits the following events:

Message Events

MsgSend

Type	Attribute Key	Attribute Value
transfer	recipient	{recipientAddress}
transfer	amount	{amount}
message	module	bank
message	action	send
message	sender	{senderAddress}

MsgMultiSend

Type	Attribute Key	Attribute Value
transfer	recipient	{recipientAddress}
transfer	amount	{amount}
message	module	bank
message	action	multisend
message	sender	{senderAddress}

Keeper Events

In addition to message events, the bank keeper will produce events when the following methods are called (or any method which ends up calling them)

MintCoins

{
  "type": "coinbase",
  "attributes": [
    {
      "key": "minter",
      "value": "{{sdk.AccAddress of the module minting coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being minted}}",
      "index": true
    }
  ]
}

{
  "type": "coin_received",
  "attributes": [
    {
      "key": "receiver",
      "value": "{{sdk.AccAddress of the module minting coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being received}}",
      "index": true
    }
  ]
}

BurnCoins

{
  "type": "burn",
  "attributes": [
    {
      "key": "burner",
      "value": "{{sdk.AccAddress of the module burning coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being burned}}",
      "index": true
    }
  ]
}

{
  "type": "coin_spent",
  "attributes": [
    {
      "key": "spender",
      "value": "{{sdk.AccAddress of the module burning coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being burned}}",
      "index": true
    }
  ]
}

addCoins

{
  "type": "coin_received",
  "attributes": [
    {
      "key": "receiver",
      "value": "{{sdk.AccAddress of the address beneficiary of the coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being received}}",
      "index": true
    }
  ]
}

subUnlockedCoins/DelegateCoins

{
  "type": "coin_spent",
  "attributes": [
    {
      "key": "spender",
      "value": "{{sdk.AccAddress of the address which is spending coins}}",
      "index": true
    },
    {
      "key": "amount",
      "value": "{{sdk.Coins being spent}}",
      "index": true
    }
  ]
}

Parameters

The bank module contains the following parameters

SendEnabled

The SendEnabled parameter is now deprecated and not to be use. It is replaced with state store records.

DefaultSendEnabled

The default send enabled value controls send transfer capability for all coin denominations unless specifically included in the array of SendEnabled parameters.

Client

CLI

A user can query and interact with the bank module using the CLI.

Query

The query commands allow users to query bank state.

simd query bank --help

balances

The balances command allows users to query account balances by address.

simd query bank balances [address] [flags]

Example:

simd query bank balances cosmos1..

Example Output:

balances:
- amount: "1000000000"
  denom: stake
pagination:
  next_key: null
  total: "0"

denom-metadata

The denom-metadata command allows users to query metadata for coin denominations. A user can query metadata for a single denomination using the --denom flag or all denominations without it.

simd query bank denom-metadata [flags]

Example:

simd query bank denom-metadata --denom stake

Example Output:

metadata:
  base: stake
  denom_units:
  - aliases:
    - STAKE
    denom: stake
  description: native staking token of simulation app
  display: stake
  name: SimApp Token
  symbol: STK

total

The total command allows users to query the total supply of coins. A user can query the total supply for a single coin using the --denom flag or all coins without it.

simd query bank total [flags]

Example:

simd query bank total --denom stake

Example Output:

amount: "10000000000"
denom: stake

send-enabled

The send-enabled command allows users to query for all or some SendEnabled entries.

simd query bank send-enabled [denom1 ...] [flags]

Example:

simd query bank send-enabled

Example output:

send_enabled:
- denom: foocoin
  enabled: true
- denom: barcoin
pagination:
  next-key: null
  total: 2

Transactions

The tx commands allow users to interact with the bank module.

simd tx bank --help

send

The send command allows users to send funds from one account to another.

simd tx bank send [from_key_or_address] [to_address] [amount] [flags]

Example:

simd tx bank send cosmos1.. cosmos1.. 100stake

gRPC

A user can query the bank module using gRPC endpoints.

Balance

The Balance endpoint allows users to query account balance by address for a given denomination.

cosmos.bank.v1beta1.Query/Balance

Example:

grpcurl -plaintext \
    -d '{"address":"cosmos1..","denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/Balance

Example Output:

{
  "balance": {
    "denom": "stake",
    "amount": "1000000000"
  }
}

AllBalances

The AllBalances endpoint allows users to query account balance by address for all denominations.

cosmos.bank.v1beta1.Query/AllBalances

Example:

grpcurl -plaintext \
    -d '{"address":"cosmos1.."}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/AllBalances

Example Output:

{
  "balances": [
    {
      "denom": "stake",
      "amount": "1000000000"
    }
  ],
  "pagination": {
    "total": "1"
  }
}

DenomMetadata

The DenomMetadata endpoint allows users to query metadata for a single coin denomination.

cosmos.bank.v1beta1.Query/DenomMetadata

Example:

grpcurl -plaintext \
    -d '{"denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/DenomMetadata

Example Output:

{
  "metadata": {
    "description": "native staking token of simulation app",
    "denomUnits": [
      {
        "denom": "stake",
        "aliases": [
          "STAKE"
        ]
      }
    ],
    "base": "stake",
    "display": "stake",
    "name": "SimApp Token",
    "symbol": "STK"
  }
}

DenomsMetadata

The DenomsMetadata endpoint allows users to query metadata for all coin denominations.

cosmos.bank.v1beta1.Query/DenomsMetadata

Example:

grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/DenomsMetadata

Example Output:

{
  "metadatas": [
    {
      "description": "native staking token of simulation app",
      "denomUnits": [
        {
          "denom": "stake",
          "aliases": [
            "STAKE"
          ]
        }
      ],
      "base": "stake",
      "display": "stake",
      "name": "SimApp Token",
      "symbol": "STK"
    }
  ],
  "pagination": {
    "total": "1"
  }
}

DenomOwners

The DenomOwners endpoint allows users to query metadata for a single coin denomination.

cosmos.bank.v1beta1.Query/DenomOwners

Example:

grpcurl -plaintext \
    -d '{"denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/DenomOwners

Example Output:

{
  "denomOwners": [
    {
      "address": "cosmos1..",
      "balance": {
        "denom": "stake",
        "amount": "5000000000"
      }
    },
    {
      "address": "cosmos1..",
      "balance": {
        "denom": "stake",
        "amount": "5000000000"
      }
    },
  ],
  "pagination": {
    "total": "2"
  }
}

TotalSupply

The TotalSupply endpoint allows users to query the total supply of all coins.

cosmos.bank.v1beta1.Query/TotalSupply

Example:

grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/TotalSupply

Example Output:

{
  "supply": [
    {
      "denom": "stake",
      "amount": "10000000000"
    }
  ],
  "pagination": {
    "total": "1"
  }
}

SupplyOf

The SupplyOf endpoint allows users to query the total supply of a single coin.

cosmos.bank.v1beta1.Query/SupplyOf

Example:

grpcurl -plaintext \
    -d '{"denom":"stake"}' \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/SupplyOf

Example Output:

{
  "amount": {
    "denom": "stake",
    "amount": "10000000000"
  }
}

Params

The Params endpoint allows users to query the parameters of the bank module.

cosmos.bank.v1beta1.Query/Params

Example:

grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/Params

Example Output:

{
  "params": {
    "defaultSendEnabled": true
  }
}

SendEnabled

The SendEnabled endpoints allows users to query the SendEnabled entries of the bank module.

Any denominations NOT returned, use the Params.DefaultSendEnabled value.

cosmos.bank.v1beta1.Query/SendEnabled

Example:

grpcurl -plaintext \
    localhost:9090 \
    cosmos.bank.v1beta1.Query/SendEnabled

Example Output:

{
  "send_enabled": [
    {
      "denom": "foocoin",
      "enabled": true
    },
    {
      "denom": "barcoin"
    }
  ],
  "pagination": {
    "next-key": null,
    "total": 2
  }
}

翻译
学分: 5
分类: Cosmos
标签: Cosmos bank

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COSMOSSDK BANK模块中文文档

sidebar_position: 1

x/bank

摘要

内容

代币供应

总供应量

模块账户

权限

状态

参数

Keepers

禁用账户地址

通用类型

Input

Output

BaseKeeper

SendKeeper

Send Restrictions

ViewKeeper

Messages

MsgSend

MsgMultiSend

MsgUpdateParams

MsgSetSendEnabled

MsgBurn

Events

Message Events

MsgSend

MsgMultiSend

Keeper Events

MintCoins

BurnCoins

addCoins

subUnlockedCoins/DelegateCoins

Parameters

SendEnabled

DefaultSendEnabled

Client

CLI

Query

balances

denom-metadata

total

send-enabled

Transactions

send

gRPC

Balance

AllBalances

DenomMetadata

DenomsMetadata

DenomOwners

TotalSupply

SupplyOf

Params

SendEnabled

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文章目录

`x/bank`