# coinbase

Description: coinbase cheatcode documentation

Note: This document was authored using MDX

  Source: https://github.com/NomicFoundation/hardhat-website/tree/main/src/content/docs/docs/reference/cheatcodes/Environment/coinbase.mdx

{/* This document contains content copied/adapted from the Foundry Book (MIT licensed). See LICENSE in the parent directory. */}

### Signature

```solidity
function coinbase(address) external;
```

### Description

Sets `block.coinbase`.

### Examples

```solidity
emit log_address(block.coinbase); // 0x0000000000000000000000000000000000000000
vm.coinbase(0xEA674fdDe714fd979de3EdF0F56AA9716B898ec8);
emit log_address(block.coinbase); // 0xea674fdde714fd979de3edf0f56aa9716b898ec8
```