# Smart Contracts

- [Hyperledger Besu EVM](/docs/core-concepts/smart-contracts/hyperledger-besu-evm.md)
- [Gas and Fees](/docs/core-concepts/smart-contracts/gas-and-fees.md)
- [Solidity Variables and Opcodes](/docs/core-concepts/smart-contracts/solidity-variables-and-opcodes.md)
- [Supported ERC Token Standards](/docs/core-concepts/smart-contracts/supported-erc-token-standards.md)
- [Hedera Services Integration with Smart Contracts](/docs/core-concepts/smart-contracts/hedera-services-integration-with-smart-contracts.md)
- [JSON-RPC Relay](/docs/core-concepts/smart-contracts/json-rpc-relay.md)
- [Hethers](/docs/core-concepts/smart-contracts/hethers.md)
- [Smart Contract Security](/docs/core-concepts/smart-contracts/security.md)