adds mattdf/RingCrypto

README.md

@@ -203,6 +203,7 @@
 - [Keydonix/uniswap-oracle](https://github.com/Keydonix/uniswap-oracle) - General purpose price feed oracle built on Uniswap v2 that uses merkle proofs under the hood.
 - [makerdao/multicall](https://github.com/makerdao/multicall) - Aggregate multiple constant function call results into one.
 - [maple-labs/erc-20](https://github.com/maple-labs/erc-20) - Maple implementation of the ERC-20 standard.
+- [mattdf/RingCrypto](https://github.com/mattdf/RingCrypto) - Ring signature related implementations for Ethereum.
 - [mds1/solidity-trigonometry](https://github.com/mds1/solidity-trigonometry) - Library with basic trigonometry functions.
 - [Modular Libraries](https://github.com/modular-network/ethereum-libraries) - Deployed utility libraries to use in your smart contracts.
 - [mzhu25/sol2string](https://github.com/mzhu25/sol2string) - `LibUintToString` library for efficiently converting `uint256` values to strings.