{
  "$schema": "https://hookforge.pages.dev/schema/hook-manifest.json",
  "slug": "variance-swap",
  "name": "VarianceSwap",
  "contract": "VarianceSwapHook",
  "version": "1.0.0",
  "family": "Derivatives",
  "summary": "Turns the exposure a liquidity provider already has into something they can actually sell.",
  "description": "Everybody who has provided liquidity to an automated market maker is short volatility. It is not a choice they made and in most cases not one they were told about: the position loses to whoever rebalances against it, in proportion to how much the price moves, which is the payoff of a short variance position with extra steps. The literature calls it loss-versus-rebalancing, and the practical consequence is that a provider's real risk has no name in the interface and no way to hedge. The exposure exists. What is missing is the other side of it. This hook measures the pool's realised variance from its own ticks, and lets anybody take either end: deposit collateral to be short variance and collect premiums, or pay a premium to be long it and get paid if the pool turns out to be wilder than the strike said. A provider who wants to stop being short volatility can buy exactly enough of the long side to cancel it, in the same contract, denominated in the same units, against the same pool. The variance is the pool's own. It is the sum of squared tick moves the pool actually made, divided by the seconds it took, and it is not quoted by anybody, not signed by anybody, and not available to be reported wrongly. Ticks are log prices, which is exactly what a variance calculation wants, so the pool's own data structure happens to be the correct input with no conversion at all. Every note is fully collateralised when it is written. The most it can ever pay is locked at that moment and released when it settles, so the short side cannot be surprised and the long side cannot be defaulted on. That is a real constraint on how much can be written and it is the right one: an uncollateralised variance seller is a counterparty risk wearing a payoff diagram.",
  "priorArt": "Variance swaps are standard over-the-counter equity derivatives. On-chain, Squeeth and this catalogue's own PowerPerp give quadratic price exposure, and Opyn, Volmex and Panoptic build volatility products on option or index machinery, all needing an external mark. Loss-versus-rebalancing is well described in the literature and universally left unhedged. Measuring realised variance from a pool's own ticks and settling fully collateralised notes on it inside that same pool, so the exposure and its hedge live in one contract, is the contribution here.",
  "limitation": "Realised variance is sampled per swap, so a pool that trades rarely reports a variance built from few observations and a pool that is quiet between two distant prints understates the path between them. The measure also cannot tell a real move from a manipulated one; on a shallow pool, buying a note and then pushing the price around is a strategy, and the cap on payout is the only thing bounding it. Notes settle in one collateral currency and pay nothing before expiry, so this is a held-to-maturity instrument, not a tradeable one. And the strike is chosen by whoever writes the note rather than discovered, so a badly struck note is simply a bad trade.",
  "tags": [
    "derivatives",
    "volatility",
    "variance-swap",
    "oracle-free",
    "no-admin"
  ],
  "recommendedChains": [
    "base",
    "arbitrum",
    "unichain",
    "robinhood",
    "ethereum",
    "optimism",
    "polygon",
    "bnb"
  ],
  "source": "contracts/src/hooks/VarianceSwapHook.sol",
  "docs": "https://hookforge.pages.dev/hooks/variance-swap",
  "repo": null,
  "site": null,
  "permissions": {
    "afterRemoveLiquidityReturnsDelta": false,
    "afterAddLiquidityReturnsDelta": false,
    "afterSwapReturnsDelta": false,
    "beforeSwapReturnsDelta": false,
    "afterDonate": false,
    "beforeDonate": false,
    "afterSwap": false,
    "beforeSwap": true,
    "afterRemoveLiquidity": false,
    "beforeRemoveLiquidity": false,
    "afterAddLiquidity": false,
    "beforeAddLiquidity": false,
    "afterInitialize": true,
    "beforeInitialize": false
  },
  "permissionsSource": "declaration",
  "properties": {
    "dynamicFee": false,
    "upgradeable": false,
    "requiresCustomSwapData": false,
    "vanillaSwap": true,
    "swapAccess": "none"
  },
  "configure": null,
  "errors": [
    {
      "signature": "AlreadyBound()",
      "notice": "This hook serves one pool, bound the first time one initializes with it."
    },
    {
      "signature": "AmountTooSmall()",
      "notice": "The deposit or withdrawal was too small to move any shares."
    },
    {
      "signature": "CollateralLocked(uint256)",
      "notice": "Withdrawing this much would leave live notes uncollateralised."
    },
    {
      "signature": "ERC20InsufficientAllowance(address,uint256,uint256)",
      "notice": "Indicates a failure with the `spender`’s `allowance`. Used in transfers."
    },
    {
      "signature": "ERC20InsufficientBalance(address,uint256,uint256)",
      "notice": "Indicates an error related to the current `balance` of a `sender`. Used in transfers."
    },
    {
      "signature": "ERC20InvalidApprover(address)",
      "notice": "Indicates a failure with the `approver` of a token to be approved. Used in approvals."
    },
    {
      "signature": "ERC20InvalidReceiver(address)",
      "notice": "Indicates a failure with the token `receiver`. Used in transfers."
    },
    {
      "signature": "ERC20InvalidSender(address)",
      "notice": "Indicates a failure with the token `sender`. Used in transfers."
    },
    {
      "signature": "ERC20InvalidSpender(address)",
      "notice": "Indicates a failure with the `spender` to be approved. Used in approvals."
    },
    {
      "signature": "HookNotImplemented()",
      "notice": "The hook function is not implemented."
    },
    {
      "signature": "InsufficientCollateral(uint256,uint256)",
      "notice": "The vault does not have enough free collateral to back this note."
    },
    {
      "signature": "InsufficientInitialLiquidity()",
      "notice": "The first deposit must exceed the permanently locked minimum."
    },
    {
      "signature": "InvalidPool()",
      "notice": "The pool is not configured to use this hook."
    },
    {
      "signature": "InvalidStrike()",
      "notice": "A strike at or above the cap leaves no room for the note to pay anything."
    },
    {
      "signature": "InvalidTerm()",
      "notice": "The term bounds are the wrong way round, or a term of zero was allowed."
    },
    {
      "signature": "NoSuchNote()",
      "notice": "There is no note at that index, or it has already settled."
    },
    {
      "signature": "NotExpired(uint64)",
      "notice": "The note has not reached its expiry."
    },
    {
      "signature": "SafeCastOverflowedIntToUint(int256)",
      "notice": "An int value doesn't fit in a uint of `bits` size."
    },
    {
      "signature": "SafeCastOverflowedUintDowncast(uint8,uint256)",
      "notice": "Value doesn't fit in a uint of `bits` size."
    },
    {
      "signature": "SafeERC20FailedOperation(address)",
      "notice": "An operation with an ERC-20 token failed."
    },
    {
      "signature": "TermOutOfRange(uint64,uint64)",
      "notice": "The requested term is outside what this hook writes."
    }
  ],
  "deployments": [],
  "abi": [
    {
      "type": "constructor",
      "inputs": [
        {
          "name": "_poolManager",
          "type": "address",
          "internalType": "contract IPoolManager"
        },
        {
          "name": "_strikePerSecond",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "_capPerSecond",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "_minTerm",
          "type": "uint64",
          "internalType": "uint64"
        },
        {
          "name": "_maxTerm",
          "type": "uint64",
          "internalType": "uint64"
        },
        {
          "name": "shareName",
          "type": "string",
          "internalType": "string"
        },
        {
          "name": "shareSymbol",
          "type": "string",
          "internalType": "string"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "afterAddLiquidity",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "params",
          "type": "tuple",
          "internalType": "struct ModifyLiquidityParams",
          "components": [
            {
              "name": "tickLower",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "tickUpper",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "liquidityDelta",
              "type": "int256",
              "internalType": "int256"
            },
            {
              "name": "salt",
              "type": "bytes32",
              "internalType": "bytes32"
            }
          ]
        },
        {
          "name": "delta0",
          "type": "int256",
          "internalType": "BalanceDelta"
        },
        {
          "name": "delta1",
          "type": "int256",
          "internalType": "BalanceDelta"
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        },
        {
          "name": "",
          "type": "int256",
          "internalType": "BalanceDelta"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "afterDonate",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "amount0",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "amount1",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "afterInitialize",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "sqrtPriceX96",
          "type": "uint160",
          "internalType": "uint160"
        },
        {
          "name": "tick",
          "type": "int24",
          "internalType": "int24"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "afterRemoveLiquidity",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "params",
          "type": "tuple",
          "internalType": "struct ModifyLiquidityParams",
          "components": [
            {
              "name": "tickLower",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "tickUpper",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "liquidityDelta",
              "type": "int256",
              "internalType": "int256"
            },
            {
              "name": "salt",
              "type": "bytes32",
              "internalType": "bytes32"
            }
          ]
        },
        {
          "name": "delta0",
          "type": "int256",
          "internalType": "BalanceDelta"
        },
        {
          "name": "delta1",
          "type": "int256",
          "internalType": "BalanceDelta"
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        },
        {
          "name": "",
          "type": "int256",
          "internalType": "BalanceDelta"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "afterSwap",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "params",
          "type": "tuple",
          "internalType": "struct SwapParams",
          "components": [
            {
              "name": "zeroForOne",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "amountSpecified",
              "type": "int256",
              "internalType": "int256"
            },
            {
              "name": "sqrtPriceLimitX96",
              "type": "uint160",
              "internalType": "uint160"
            }
          ]
        },
        {
          "name": "delta",
          "type": "int256",
          "internalType": "BalanceDelta"
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        },
        {
          "name": "",
          "type": "int128",
          "internalType": "int128"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "allowance",
      "inputs": [
        {
          "name": "owner",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "spender",
          "type": "address",
          "internalType": "address"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "approve",
      "inputs": [
        {
          "name": "spender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "value",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bool",
          "internalType": "bool"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "balanceOf",
      "inputs": [
        {
          "name": "account",
          "type": "address",
          "internalType": "address"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "beforeAddLiquidity",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "params",
          "type": "tuple",
          "internalType": "struct ModifyLiquidityParams",
          "components": [
            {
              "name": "tickLower",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "tickUpper",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "liquidityDelta",
              "type": "int256",
              "internalType": "int256"
            },
            {
              "name": "salt",
              "type": "bytes32",
              "internalType": "bytes32"
            }
          ]
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "beforeDonate",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "amount0",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "amount1",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "beforeInitialize",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "sqrtPriceX96",
          "type": "uint160",
          "internalType": "uint160"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "beforeRemoveLiquidity",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "params",
          "type": "tuple",
          "internalType": "struct ModifyLiquidityParams",
          "components": [
            {
              "name": "tickLower",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "tickUpper",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "liquidityDelta",
              "type": "int256",
              "internalType": "int256"
            },
            {
              "name": "salt",
              "type": "bytes32",
              "internalType": "bytes32"
            }
          ]
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "beforeSwap",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "key",
          "type": "tuple",
          "internalType": "struct PoolKey",
          "components": [
            {
              "name": "currency0",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "currency1",
              "type": "address",
              "internalType": "Currency"
            },
            {
              "name": "fee",
              "type": "uint24",
              "internalType": "uint24"
            },
            {
              "name": "tickSpacing",
              "type": "int24",
              "internalType": "int24"
            },
            {
              "name": "hooks",
              "type": "address",
              "internalType": "contract IHooks"
            }
          ]
        },
        {
          "name": "params",
          "type": "tuple",
          "internalType": "struct SwapParams",
          "components": [
            {
              "name": "zeroForOne",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "amountSpecified",
              "type": "int256",
              "internalType": "int256"
            },
            {
              "name": "sqrtPriceLimitX96",
              "type": "uint160",
              "internalType": "uint160"
            }
          ]
        },
        {
          "name": "hookData",
          "type": "bytes",
          "internalType": "bytes"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bytes4",
          "internalType": "bytes4"
        },
        {
          "name": "",
          "type": "int256",
          "internalType": "BeforeSwapDelta"
        },
        {
          "name": "",
          "type": "uint24",
          "internalType": "uint24"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "capPerSecond",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "collateral",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "address",
          "internalType": "Currency"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "cumulativeVariance",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "decimals",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint8",
          "internalType": "uint8"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "deposit",
      "inputs": [
        {
          "name": "amount",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "shares",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "freeCollateral",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "getHookPermissions",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "tuple",
          "internalType": "struct Hooks.Permissions",
          "components": [
            {
              "name": "beforeInitialize",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterInitialize",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "beforeAddLiquidity",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterAddLiquidity",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "beforeRemoveLiquidity",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterRemoveLiquidity",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "beforeSwap",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterSwap",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "beforeDonate",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterDonate",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "beforeSwapReturnDelta",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterSwapReturnDelta",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterAddLiquidityReturnDelta",
              "type": "bool",
              "internalType": "bool"
            },
            {
              "name": "afterRemoveLiquidityReturnDelta",
              "type": "bool",
              "internalType": "bool"
            }
          ]
        }
      ],
      "stateMutability": "pure"
    },
    {
      "type": "function",
      "name": "hookName",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "string",
          "internalType": "string"
        }
      ],
      "stateMutability": "pure"
    },
    {
      "type": "function",
      "name": "hookTags",
      "inputs": [],
      "outputs": [
        {
          "name": "tags",
          "type": "string[]",
          "internalType": "string[]"
        }
      ],
      "stateMutability": "pure"
    },
    {
      "type": "function",
      "name": "hookVersion",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "string",
          "internalType": "string"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "lastTick",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "int24",
          "internalType": "int24"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "maxTerm",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint64",
          "internalType": "uint64"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "minTerm",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint64",
          "internalType": "uint64"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "name",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "string",
          "internalType": "string"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "noteCount",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "noteOf",
      "inputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "holder",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "notional",
          "type": "uint128",
          "internalType": "uint128"
        },
        {
          "name": "maxPayout",
          "type": "uint128",
          "internalType": "uint128"
        },
        {
          "name": "cumulativeAtOpen",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "openedAt",
          "type": "uint64",
          "internalType": "uint64"
        },
        {
          "name": "expiresAt",
          "type": "uint64",
          "internalType": "uint64"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "open",
      "inputs": [
        {
          "name": "notional",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "term",
          "type": "uint64",
          "internalType": "uint64"
        }
      ],
      "outputs": [
        {
          "name": "note",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "payoutIfSettledNow",
      "inputs": [
        {
          "name": "note",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "poolKey",
      "inputs": [],
      "outputs": [
        {
          "name": "currency0",
          "type": "address",
          "internalType": "Currency"
        },
        {
          "name": "currency1",
          "type": "address",
          "internalType": "Currency"
        },
        {
          "name": "fee",
          "type": "uint24",
          "internalType": "uint24"
        },
        {
          "name": "tickSpacing",
          "type": "int24",
          "internalType": "int24"
        },
        {
          "name": "hooks",
          "type": "address",
          "internalType": "contract IHooks"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "poolManager",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "address",
          "internalType": "contract IPoolManager"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "quote",
      "inputs": [
        {
          "name": "notional",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "premium",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "maxPayout",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "realisedSince",
      "inputs": [
        {
          "name": "cumulativeAtOpen",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "settle",
      "inputs": [
        {
          "name": "note",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "specURI",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "string",
          "internalType": "string"
        }
      ],
      "stateMutability": "pure"
    },
    {
      "type": "function",
      "name": "strikePerSecond",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "supportsInterface",
      "inputs": [
        {
          "name": "interfaceId",
          "type": "bytes4",
          "internalType": "bytes4"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bool",
          "internalType": "bool"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "symbol",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "string",
          "internalType": "string"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "totalCollateral",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "totalLocked",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "totalSupply",
      "inputs": [],
      "outputs": [
        {
          "name": "",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "view"
    },
    {
      "type": "function",
      "name": "transfer",
      "inputs": [
        {
          "name": "to",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "value",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bool",
          "internalType": "bool"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "transferFrom",
      "inputs": [
        {
          "name": "from",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "to",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "value",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "",
          "type": "bool",
          "internalType": "bool"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "function",
      "name": "withdraw",
      "inputs": [
        {
          "name": "shares",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "outputs": [
        {
          "name": "amount",
          "type": "uint256",
          "internalType": "uint256"
        }
      ],
      "stateMutability": "nonpayable"
    },
    {
      "type": "event",
      "name": "Approval",
      "inputs": [
        {
          "name": "owner",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "spender",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "value",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        }
      ],
      "anonymous": false
    },
    {
      "type": "event",
      "name": "Deposited",
      "inputs": [
        {
          "name": "who",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "amount",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        },
        {
          "name": "shares",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        }
      ],
      "anonymous": false
    },
    {
      "type": "event",
      "name": "Opened",
      "inputs": [
        {
          "name": "note",
          "type": "uint256",
          "indexed": true,
          "internalType": "uint256"
        },
        {
          "name": "holder",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "notional",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        },
        {
          "name": "premium",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        },
        {
          "name": "maxPayout",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        }
      ],
      "anonymous": false
    },
    {
      "type": "event",
      "name": "Settled",
      "inputs": [
        {
          "name": "note",
          "type": "uint256",
          "indexed": true,
          "internalType": "uint256"
        },
        {
          "name": "holder",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "realised",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        },
        {
          "name": "payout",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        }
      ],
      "anonymous": false
    },
    {
      "type": "event",
      "name": "Transfer",
      "inputs": [
        {
          "name": "from",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "to",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "value",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        }
      ],
      "anonymous": false
    },
    {
      "type": "event",
      "name": "Withdrawn",
      "inputs": [
        {
          "name": "who",
          "type": "address",
          "indexed": true,
          "internalType": "address"
        },
        {
          "name": "amount",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        },
        {
          "name": "shares",
          "type": "uint256",
          "indexed": false,
          "internalType": "uint256"
        }
      ],
      "anonymous": false
    },
    {
      "type": "error",
      "name": "AlreadyBound",
      "inputs": []
    },
    {
      "type": "error",
      "name": "AmountTooSmall",
      "inputs": []
    },
    {
      "type": "error",
      "name": "CollateralLocked",
      "inputs": [
        {
          "name": "free",
          "type": "uint256",
          "internalType": "uint256"
        }
      ]
    },
    {
      "type": "error",
      "name": "ERC20InsufficientAllowance",
      "inputs": [
        {
          "name": "spender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "allowance",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "needed",
          "type": "uint256",
          "internalType": "uint256"
        }
      ]
    },
    {
      "type": "error",
      "name": "ERC20InsufficientBalance",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        },
        {
          "name": "balance",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "needed",
          "type": "uint256",
          "internalType": "uint256"
        }
      ]
    },
    {
      "type": "error",
      "name": "ERC20InvalidApprover",
      "inputs": [
        {
          "name": "approver",
          "type": "address",
          "internalType": "address"
        }
      ]
    },
    {
      "type": "error",
      "name": "ERC20InvalidReceiver",
      "inputs": [
        {
          "name": "receiver",
          "type": "address",
          "internalType": "address"
        }
      ]
    },
    {
      "type": "error",
      "name": "ERC20InvalidSender",
      "inputs": [
        {
          "name": "sender",
          "type": "address",
          "internalType": "address"
        }
      ]
    },
    {
      "type": "error",
      "name": "ERC20InvalidSpender",
      "inputs": [
        {
          "name": "spender",
          "type": "address",
          "internalType": "address"
        }
      ]
    },
    {
      "type": "error",
      "name": "HookNotImplemented",
      "inputs": []
    },
    {
      "type": "error",
      "name": "InsufficientCollateral",
      "inputs": [
        {
          "name": "free",
          "type": "uint256",
          "internalType": "uint256"
        },
        {
          "name": "needed",
          "type": "uint256",
          "internalType": "uint256"
        }
      ]
    },
    {
      "type": "error",
      "name": "InsufficientInitialLiquidity",
      "inputs": []
    },
    {
      "type": "error",
      "name": "InvalidPool",
      "inputs": []
    },
    {
      "type": "error",
      "name": "InvalidStrike",
      "inputs": []
    },
    {
      "type": "error",
      "name": "InvalidTerm",
      "inputs": []
    },
    {
      "type": "error",
      "name": "NoSuchNote",
      "inputs": []
    },
    {
      "type": "error",
      "name": "NotExpired",
      "inputs": [
        {
          "name": "expiresAt",
          "type": "uint64",
          "internalType": "uint64"
        }
      ]
    },
    {
      "type": "error",
      "name": "NotPoolManager",
      "inputs": []
    },
    {
      "type": "error",
      "name": "SafeCastOverflowedIntToUint",
      "inputs": [
        {
          "name": "value",
          "type": "int256",
          "internalType": "int256"
        }
      ]
    },
    {
      "type": "error",
      "name": "SafeCastOverflowedUintDowncast",
      "inputs": [
        {
          "name": "bits",
          "type": "uint8",
          "internalType": "uint8"
        },
        {
          "name": "value",
          "type": "uint256",
          "internalType": "uint256"
        }
      ]
    },
    {
      "type": "error",
      "name": "SafeERC20FailedOperation",
      "inputs": [
        {
          "name": "token",
          "type": "address",
          "internalType": "address"
        }
      ]
    },
    {
      "type": "error",
      "name": "TermOutOfRange",
      "inputs": [
        {
          "name": "shortest",
          "type": "uint64",
          "internalType": "uint64"
        },
        {
          "name": "longest",
          "type": "uint64",
          "internalType": "uint64"
        }
      ]
    }
  ]
}