# StringLibrary
[Git Source](https://github.com/buildship-dev/nft-contracts/blob/fd1c33a9dbefe42158dfc60d10c0afde05c713aa/contracts/utils/Rarible/ExchangeV1.sol)


## Functions
### append


```solidity
function append(string memory a, string memory b) internal pure returns (string memory);
```

### append


```solidity
function append(string memory a, string memory b, string memory c) internal pure returns (string memory);
```

### recover


```solidity
function recover(string memory message, uint8 v, bytes32 r, bytes32 s) internal pure returns (address);
```

### concat


```solidity
function concat(
    bytes memory ba,
    bytes memory bb,
    bytes memory bc,
    bytes memory bd,
    bytes memory be,
    bytes memory bf,
    bytes memory bg
) internal pure returns (bytes memory);
```