# Multicall2

*Michael Elliot <<mike@makerdao.com>>Joshua Levine <<joshua@makerdao.com>>Nick Johnson <<arachnid@notdot.net>>*

> Multicall2 - Aggregate results from multiple read-only function calls

## Methods

### aggregate

```solidity
function aggregate(Multicall2.Call[] calls) external nonpayable returns (uint256 blockNumber, bytes[] returnData)
```

#### Parameters

| Name  | Type               | Description |
| ----- | ------------------ | ----------- |
| calls | Multicall2.Call\[] | undefined   |

#### Returns

| Name        | Type     | Description |
| ----------- | -------- | ----------- |
| blockNumber | uint256  | undefined   |
| returnData  | bytes\[] | undefined   |

### blockAndAggregate

```solidity
function blockAndAggregate(Multicall2.Call[] calls) external nonpayable returns (uint256 blockNumber, bytes32 blockHash, struct Multicall2.Result[] returnData)
```

#### Parameters

| Name  | Type               | Description |
| ----- | ------------------ | ----------- |
| calls | Multicall2.Call\[] | undefined   |

#### Returns

| Name        | Type                 | Description |
| ----------- | -------------------- | ----------- |
| blockNumber | uint256              | undefined   |
| blockHash   | bytes32              | undefined   |
| returnData  | Multicall2.Result\[] | undefined   |

### getBlockHash

```solidity
function getBlockHash(uint256 blockNumber) external view returns (bytes32 blockHash)
```

#### Parameters

| Name        | Type    | Description |
| ----------- | ------- | ----------- |
| blockNumber | uint256 | undefined   |

#### Returns

| Name      | Type    | Description |
| --------- | ------- | ----------- |
| blockHash | bytes32 | undefined   |

### getBlockNumber

```solidity
function getBlockNumber() external view returns (uint256 blockNumber)
```

#### Returns

| Name        | Type    | Description |
| ----------- | ------- | ----------- |
| blockNumber | uint256 | undefined   |

### getCurrentBlockCoinbase

```solidity
function getCurrentBlockCoinbase() external view returns (address coinbase)
```

#### Returns

| Name     | Type    | Description |
| -------- | ------- | ----------- |
| coinbase | address | undefined   |

### getCurrentBlockDifficulty

```solidity
function getCurrentBlockDifficulty() external view returns (uint256 difficulty)
```

#### Returns

| Name       | Type    | Description |
| ---------- | ------- | ----------- |
| difficulty | uint256 | undefined   |

### getCurrentBlockGasLimit

```solidity
function getCurrentBlockGasLimit() external view returns (uint256 gaslimit)
```

#### Returns

| Name     | Type    | Description |
| -------- | ------- | ----------- |
| gaslimit | uint256 | undefined   |

### getCurrentBlockTimestamp

```solidity
function getCurrentBlockTimestamp() external view returns (uint256 timestamp)
```

#### Returns

| Name      | Type    | Description |
| --------- | ------- | ----------- |
| timestamp | uint256 | undefined   |

### getEthBalance

```solidity
function getEthBalance(address addr) external view returns (uint256 balance)
```

#### Parameters

| Name | Type    | Description |
| ---- | ------- | ----------- |
| addr | address | undefined   |

#### Returns

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| balance | uint256 | undefined   |

### getLastBlockHash

```solidity
function getLastBlockHash() external view returns (bytes32 blockHash)
```

#### Returns

| Name      | Type    | Description |
| --------- | ------- | ----------- |
| blockHash | bytes32 | undefined   |

### tryAggregate

```solidity
function tryAggregate(bool requireSuccess, Multicall2.Call[] calls) external nonpayable returns (struct Multicall2.Result[] returnData)
```

#### Parameters

| Name           | Type               | Description |
| -------------- | ------------------ | ----------- |
| requireSuccess | bool               | undefined   |
| calls          | Multicall2.Call\[] | undefined   |

#### Returns

| Name       | Type                 | Description |
| ---------- | -------------------- | ----------- |
| returnData | Multicall2.Result\[] | undefined   |

### tryBlockAndAggregate

```solidity
function tryBlockAndAggregate(bool requireSuccess, Multicall2.Call[] calls) external nonpayable returns (uint256 blockNumber, bytes32 blockHash, struct Multicall2.Result[] returnData)
```

#### Parameters

| Name           | Type               | Description |
| -------------- | ------------------ | ----------- |
| requireSuccess | bool               | undefined   |
| calls          | Multicall2.Call\[] | undefined   |

#### Returns

| Name        | Type                 | Description |
| ----------- | -------------------- | ----------- |
| blockNumber | uint256              | undefined   |
| blockHash   | bytes32              | undefined   |
| returnData  | Multicall2.Result\[] | undefined   |