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// SPDX-License-Identifier: GPL-2.0-or-later

pragma solidity ^0.8.0;

import {ISequenceRegistry} from "../interfaces/ISequenceRegistry.sol";

/// @title SequenceRegistry
/// @custom:security-contact [email protected]
/// @author Euler Labs (https://www.eulerlabs.com/)
/// @notice This contract maintains sequence counters associated with opaque designator strings.
/// Each counter starts at 1.
/// @dev Anybody can reserve a sequence ID. The only guarantee provided is that no two reservations for the same
/// designator will get the same ID.
contract SequenceRegistry is ISequenceRegistry {
    /// @dev Each designator maps to the previous sequence ID issued, or 0 if none were ever issued.
    mapping(string designator => uint256 lastSeqId) public counters;

    /// @notice A sequence ID has been reserved
    /// @param designator The opaque designator string
    /// @param id The reserved ID, which is unique per designator
    /// @param caller The msg.sender who reserved the ID
    event SequenceIdReserved(string designator, uint256 indexed id, address indexed caller);

    /// @inheritdoc ISequenceRegistry
    function reserveSeqId(string calldata designator) external returns (uint256) {
        uint256 seqId = ++counters[designator];

        emit SequenceIdReserved(designator, seqId, msg.sender);

        return seqId;
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later

pragma solidity >=0.8.0;

/// @title ISequenceRegistry
/// @custom:security-contact [email protected]
/// @author Euler Labs (https://www.eulerlabs.com/)
/// @notice Provides an interface for reserving sequence IDs.
interface ISequenceRegistry {
    /// @notice Reserve an ID for a given designator
    /// @param designator An opaque string that corresponds to the sequence counter to be used
    /// @return Sequence ID
    function reserveSeqId(string calldata designator) external returns (uint256);
}

{
  "remappings": [
    "lib/euler-price-oracle:@openzeppelin/contracts/=lib/euler-price-oracle/lib/openzeppelin-contracts/contracts/",
    "lib/native-token-transfers/evm:openzeppelin-contracts/contracts/=lib/native-token-transfers/evm/lib/openzeppelin-contracts/contracts/",
    "lib/euler-earn:@openzeppelin/=lib/euler-earn/lib/openzeppelin-contracts/",
    "lib/euler-earn:@openzeppelin-upgradeable/=lib/euler-earn/lib/openzeppelin-contracts-upgradeable/contracts/",
    "lib/euler-earn:ethereum-vault-connector/=lib/euler-earn/lib/ethereum-vault-connector/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/contracts/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "ethereum-vault-connector/=lib/ethereum-vault-connector/src/",
    "evc/=lib/ethereum-vault-connector/src/",
    "evk/=lib/euler-vault-kit/src/",
    "evk-test/=lib/euler-vault-kit/test/",
    "euler-price-oracle/=lib/euler-price-oracle/src/",
    "euler-price-oracle-test/=lib/euler-price-oracle/test/",
    "fee-flow/=lib/fee-flow/src/",
    "reward-streams/=lib/reward-streams/src/",
    "@openzeppelin/=lib/openzeppelin-contracts/contracts/",
    "euler-earn/=lib/euler-earn/src/",
    "native-token-transfers/=lib/native-token-transfers/evm/src/",
    "@openzeppelin-upgradeable/=lib/euler-earn/lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "@pendle/core-v2/=lib/euler-price-oracle/lib/pendle-core-v2-public/contracts/",
    "@pyth/=lib/euler-price-oracle/lib/pyth-sdk-solidity/",
    "@redstone/evm-connector/=lib/euler-price-oracle/lib/redstone-oracles-monorepo/packages/evm-connector/contracts/",
    "@solady/=lib/euler-price-oracle/lib/solady/src/",
    "@uniswap/v3-core/=lib/euler-price-oracle/lib/v3-core/",
    "@uniswap/v3-periphery/=lib/euler-price-oracle/lib/v3-periphery/",
    "ERC4626/=lib/euler-earn/lib/properties/lib/ERC4626/contracts/",
    "crytic-properties/=lib/euler-earn/lib/properties/contracts/",
    "ds-test/=lib/ethereum-vault-connector/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "euler-vault-kit/=lib/euler-vault-kit/",
    "forge-gas-snapshot/=lib/euler-vault-kit/lib/permit2/lib/forge-gas-snapshot/src/",
    "forge-std/=lib/forge-std/src/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts-upgradeable/lib/halmos-cheatcodes/src/",
    "layerzero-devtools/=lib/layerzero-devtools/packages/toolbox-foundry/src/",
    "layerzero-v2/=lib/layerzero-v2/",
    "openzeppelin/=lib/ethereum-vault-connector/lib/openzeppelin-contracts/contracts/",
    "pendle-core-v2-public/=lib/euler-price-oracle/lib/pendle-core-v2-public/contracts/",
    "permit2/=lib/euler-vault-kit/lib/permit2/",
    "properties/=lib/euler-earn/lib/properties/contracts/",
    "pyth-sdk-solidity/=lib/euler-price-oracle/lib/pyth-sdk-solidity/",
    "redstone-oracles-monorepo/=lib/euler-price-oracle/lib/",
    "solady/=lib/euler-price-oracle/lib/solady/src/",
    "solidity-bytes-utils/=lib/native-token-transfers/evm/lib/solidity-bytes-utils/contracts/",
    "solmate/=lib/fee-flow/lib/solmate/src/",
    "v3-core/=lib/euler-price-oracle/lib/v3-core/contracts/",
    "v3-periphery/=lib/euler-price-oracle/lib/v3-periphery/contracts/",
    "wormhole-solidity-sdk/=lib/native-token-transfers/evm/lib/wormhole-solidity-sdk/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

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[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"designator","type":"string"},{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"address","name":"caller","type":"address"}],"name":"SequenceIdReserved","type":"event"},{"inputs":[{"internalType":"string","name":"designator","type":"string"}],"name":"counters","outputs":[{"internalType":"uint256","name":"lastSeqId","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"designator","type":"string"}],"name":"reserveSeqId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]

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