{
  "fileName": "IRelayRecipient.sol",
  "contractName": "IRelayRecipient",
  "source": "pragma solidity ^0.6.0;\n\n/**\n * @dev Base interface for a contract that will be called via the GSN from {IRelayHub}.\n *\n * TIP: You don't need to write an implementation yourself! Inherit from {GSNRecipient} instead.\n */\ninterface IRelayRecipient {\n    /**\n     * @dev Returns the address of the {IRelayHub} instance this recipient interacts with.\n     */\n    function getHubAddr() external view returns (address);\n\n    /**\n     * @dev Called by {IRelayHub} to validate if this recipient accepts being charged for a relayed call. Note that the\n     * recipient will be charged regardless of the execution result of the relayed call (i.e. if it reverts or not).\n     *\n     * The relay request was originated by `from` and will be served by `relay`. `encodedFunction` is the relayed call\n     * calldata, so its first four bytes are the function selector. The relayed call will be forwarded `gasLimit` gas,\n     * and the transaction executed with a gas price of at least `gasPrice`. ``relay``'s fee is `transactionFee`, and the\n     * recipient will be charged at most `maxPossibleCharge` (in wei). `nonce` is the sender's (`from`) nonce for\n     * replay attack protection in {IRelayHub}, and `approvalData` is a optional parameter that can be used to hold a signature\n     * over all or some of the previous values.\n     *\n     * Returns a tuple, where the first value is used to indicate approval (0) or rejection (custom non-zero error code,\n     * values 1 to 10 are reserved) and the second one is data to be passed to the other {IRelayRecipient} functions.\n     *\n     * {acceptRelayedCall} is called with 50k gas: if it runs out during execution, the request will be considered\n     * rejected. A regular revert will also trigger a rejection.\n     */\n    function acceptRelayedCall(\n        address relay,\n        address from,\n        bytes calldata encodedFunction,\n        uint256 transactionFee,\n        uint256 gasPrice,\n        uint256 gasLimit,\n        uint256 nonce,\n        bytes calldata approvalData,\n        uint256 maxPossibleCharge\n    )\n        external\n        view\n        returns (uint256, bytes memory);\n\n    /**\n     * @dev Called by {IRelayHub} on approved relay call requests, before the relayed call is executed. This allows to e.g.\n     * pre-charge the sender of the transaction.\n     *\n     * `context` is the second value returned in the tuple by {acceptRelayedCall}.\n     *\n     * Returns a value to be passed to {postRelayedCall}.\n     *\n     * {preRelayedCall} is called with 100k gas: if it runs out during exection or otherwise reverts, the relayed call\n     * will not be executed, but the recipient will still be charged for the transaction's cost.\n     */\n    function preRelayedCall(bytes calldata context) external returns (bytes32);\n\n    /**\n     * @dev Called by {IRelayHub} on approved relay call requests, after the relayed call is executed. This allows to e.g.\n     * charge the user for the relayed call costs, return any overcharges from {preRelayedCall}, or perform\n     * contract-specific bookkeeping.\n     *\n     * `context` is the second value returned in the tuple by {acceptRelayedCall}. `success` is the execution status of\n     * the relayed call. `actualCharge` is an estimate of how much the recipient will be charged for the transaction,\n     * not including any gas used by {postRelayedCall} itself. `preRetVal` is {preRelayedCall}'s return value.\n     *\n     *\n     * {postRelayedCall} is called with 100k gas: if it runs out during execution or otherwise reverts, the relayed call\n     * and the call to {preRelayedCall} will be reverted retroactively, but the recipient will still be charged for the\n     * transaction's cost.\n     */\n    function postRelayedCall(bytes calldata context, bool success, uint256 actualCharge, bytes32 preRetVal) external;\n}\n",
  "sourcePath": "contracts/GSN/IRelayRecipient.sol",
  "sourceMap": "",
  "deployedSourceMap": "",
  "abi": [
    {
      "inputs": [
        {
          "internalType": "address",
          "name": "relay",
          "type": "address"
        },
        {
          "internalType": "address",
          "name": "from",
          "type": "address"
        },
        {
          "internalType": "bytes",
          "name": "encodedFunction",
          "type": "bytes"
        },
        {
          "internalType": "uint256",
          "name": "transactionFee",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "gasPrice",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "gasLimit",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "nonce",
          "type": "uint256"
        },
        {
          "internalType": "bytes",
          "name": "approvalData",
          "type": "bytes"
        },
        {
          "internalType": "uint256",
          "name": "maxPossibleCharge",
          "type": "uint256"
        }
      ],
      "name": "acceptRelayedCall",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "",
          "type": "uint256"
        },
        {
          "internalType": "bytes",
          "name": "",
          "type": "bytes"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [],
      "name": "getHubAddr",
      "outputs": [
        {
          "internalType": "address",
          "name": "",
          "type": "address"
        }
      ],
      "stateMutability": "view",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "bytes",
          "name": "context",
          "type": "bytes"
        },
        {
          "internalType": "bool",
          "name": "success",
          "type": "bool"
        },
        {
          "internalType": "uint256",
          "name": "actualCharge",
          "type": "uint256"
        },
        {
          "internalType": "bytes32",
          "name": "preRetVal",
          "type": "bytes32"
        }
      ],
      "name": "postRelayedCall",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "internalType": "bytes",
          "name": "context",
          "type": "bytes"
        }
      ],
      "name": "preRelayedCall",
      "outputs": [
        {
          "internalType": "bytes32",
          "name": "",
          "type": "bytes32"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    }
  ],
  "ast": {
    "absolutePath": "contracts/GSN/IRelayRecipient.sol",
    "exportedSymbols": {
      "IRelayRecipient": [
        1334
      ]
    },
    "id": 1335,
    "nodeType": "SourceUnit",
    "nodes": [
      {
        "id": 1280,
        "literals": [
          "solidity",
          "^",
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          ".0"
        ],
        "nodeType": "PragmaDirective",
        "src": "0:23:5"
      },
      {
        "abstract": false,
        "baseContracts": [],
        "contractDependencies": [],
        "contractKind": "interface",
        "documentation": {
          "id": 1281,
          "nodeType": "StructuredDocumentation",
          "src": "25:195:5",
          "text": "@dev Base interface for a contract that will be called via the GSN from {IRelayHub}.\n * TIP: You don't need to write an implementation yourself! Inherit from {GSNRecipient} instead."
        },
        "fullyImplemented": false,
        "id": 1334,
        "linearizedBaseContracts": [
          1334
        ],
        "name": "IRelayRecipient",
        "nodeType": "ContractDefinition",
        "nodes": [
          {
            "body": null,
            "documentation": {
              "id": 1282,
              "nodeType": "StructuredDocumentation",
              "src": "253:102:5",
              "text": "@dev Returns the address of the {IRelayHub} instance this recipient interacts with."
            },
            "functionSelector": "74e861d6",
            "id": 1287,
            "implemented": false,
            "kind": "function",
            "modifiers": [],
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              "src": "379:2:5"
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            "returnParameters": {
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              "src": "420:1338:5",
              "text": "@dev Called by {IRelayHub} to validate if this recipient accepts being charged for a relayed call. Note that the\nrecipient will be charged regardless of the execution result of the relayed call (i.e. if it reverts or not).\n     * The relay request was originated by `from` and will be served by `relay`. `encodedFunction` is the relayed call\ncalldata, so its first four bytes are the function selector. The relayed call will be forwarded `gasLimit` gas,\nand the transaction executed with a gas price of at least `gasPrice`. ``relay``'s fee is `transactionFee`, and the\nrecipient will be charged at most `maxPossibleCharge` (in wei). `nonce` is the sender's (`from`) nonce for\nreplay attack protection in {IRelayHub}, and `approvalData` is a optional parameter that can be used to hold a signature\nover all or some of the previous values.\n     * Returns a tuple, where the first value is used to indicate approval (0) or rejection (custom non-zero error code,\nvalues 1 to 10 are reserved) and the second one is data to be passed to the other {IRelayRecipient} functions.\n     * {acceptRelayedCall} is called with 50k gas: if it runs out during execution, the request will be considered\nrejected. A regular revert will also trigger a rejection."
            },
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            "id": 1313,
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              "text": "@dev Called by {IRelayHub} on approved relay call requests, before the relayed call is executed. This allows to e.g.\npre-charge the sender of the transaction.\n     * `context` is the second value returned in the tuple by {acceptRelayedCall}.\n     * Returns a value to be passed to {postRelayedCall}.\n     * {preRelayedCall} is called with 100k gas: if it runs out during exection or otherwise reverts, the relayed call\nwill not be executed, but the recipient will still be charged for the transaction's cost."
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              "text": "@dev Called by {IRelayHub} on approved relay call requests, after the relayed call is executed. This allows to e.g.\ncharge the user for the relayed call costs, return any overcharges from {preRelayedCall}, or perform\ncontract-specific bookkeeping.\n     * `context` is the second value returned in the tuple by {acceptRelayedCall}. `success` is the execution status of\nthe relayed call. `actualCharge` is an estimate of how much the recipient will be charged for the transaction,\nnot including any gas used by {postRelayedCall} itself. `preRetVal` is {preRelayedCall}'s return value.\n     *\n{postRelayedCall} is called with 100k gas: if it runs out during execution or otherwise reverts, the relayed call\nand the call to {preRelayedCall} will be reverted retroactively, but the recipient will still be charged for the\ntransaction's cost."
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