> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tenderly.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Simulation API With State Overrides

> Override contract storage slots and balances in the Simulation API to test scenarios not present on the live network, like minting as a ward.

State overrides allow you to customize the network state for the purpose of your [simulation](/simulations/overview). This feature is useful when you need to test scenarios under conditions that aren't currently present on the live network. To apply the same overrides through the dashboard instead of the API, see [state overrides in the Simulator UI](/simulator-ui/state-overrides).

To illustrate how state overrides work, let's use the DAI stablecoin contract. In the DAI system, certain actions, like minting new DAI tokens, can only be performed by addresses designated as `wards`. If your address isn't a ward, you can't test minting operations.

## Setting up as a ward through state overrides

To simulate a transaction where we mint DAI, we need to override the state to make our address appear as a ward. We need to adjust the `wards` map in the DAI contract to include our address with the necessary permissions.

To be able to mint, the sender of the transaction must be a ward. In other words, the following condition must hold: `wards['0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2'] == 1`.

In the API request, assign a map of overrides to the `state_objects` object. This map points to specific storage locations in the smart contract and assigns new values for the simulation.

* DAI contract address: `0x6b175474e89094c44da98b954eedeac495271d0f`
* Storage slot location: `0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03`
* Override value: `0x0000000000000000000000000000000000000000000000000000000000000001`

```json title="example.json" showLineNumbers theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
{
  "state_objects": {
    "0x6b175474e89094c44da98b954eedeac495271d0f": {
      "storage": {
        "0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03": "0x0000000000000000000000000000000000000000000000000000000000000001"
      }
    }
  }
}
```

The script below shows how to set the overrides and send a request to Simulation API.

Make sure to have `TENDERLY_ACCOUNT_SLUG` and `TENDERLY_ACCESS_KEY` set as environment variables. Learn how to obtain the slug and access key.

<Tabs>
  <Tab title="Request">
    ```typescript title="example.ts" showLineNumbers theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}

    dotenv.config();

    // assuming environment variables TENDERLY_ACCOUNT_SLUG, TENDERLY_PROJECT_SLUG and TENDERLY_ACCESS_KEY are set
    // https://docs.tenderly.co/platform/account/projects/slug
    // https://docs.tenderly.co/platform/account/projects/api-tokens
    const { TENDERLY_ACCOUNT_SLUG, TENDERLY_PROJECT_SLUG, TENDERLY_ACCESS_KEY } = process.env;

    const mintDai = async () => {
      console.time('Simulation');
      const fakeWardAddress = '0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2';
      // calculate the storage location of `wards[fakeWardAddress]`
      // yields 0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03
      const overrideStorageLocation = ethers.utils.keccak256(
        ethers.utils.concat([
          ethers.utils.hexZeroPad(fakeWardAddress, 32), // the ward address (address 0x000..0) - mapping key
          ethers.utils.hexZeroPad('0x0', 32), // the wards slot is 0th in the DAI contract - the mapping variable
        ]),
      );
      console.log('Storage Override Location', overrideStorageLocation);
      const mint = (
        await axios.post(
          `https://api.tenderly.co/api/v1/account/${TENDERLY_ACCOUNT_SLUG}/project/${TENDERLY_PROJECT_SLUG}/simulate`,
          // the transaction
          {
            save: true,
            save_if_fails: true,
            simulation_type: 'full',
            network_id: '1',
            from: '0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2',
            to: '0x6b175474e89094c44da98b954eedeac495271d0f',
            input:
              '0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000',
            gas: 8000000,
            state_objects: {
              '0x6b175474e89094c44da98b954eedeac495271d0f': {
                storage: {
                  '0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03':
                    '0x0000000000000000000000000000000000000000000000000000000000000001',
                },
              },
            },
          },
          {
            headers: {
              'X-Access-Key': TENDERLY_ACCESS_KEY as string,
            },
          },
        )
      ).data;

      console.timeEnd('Simulation');
      console.log(JSON.stringify(mint, null, 2));
      // TODO: extract token transferred
    };

    mintDai();
    ```
  </Tab>

  <Tab title="Response">
    ```bash theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
    Storage Override Location 0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03
    Simulation: 185.029ms
    {
      "transaction": {
        "hash": "0xd9d52b2cb6b6d8d8640bc2dee86050a623401fe39d7fbc4ab46ffd7ff3ea6ab6",
        "block_hash": "",
        "block_number": 16598541,
        "from": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
        "gas": 8000000,
        "gas_price": 0,
        "gas_fee_cap": 0,
        "gas_tip_cap": 0,
        "cumulative_gas_used": 0,
        "gas_used": 53465,
        "effective_gas_price": 0,
        "input": "0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000",
        "nonce": 0,
        "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
        "index": 0,
        "value": "0x",
        "access_list": null,
        "status": true,
        "addresses": [
          "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
          "0x6b175474e89094c44da98b954eedeac495271d0f"
        ],
        "contract_ids": [
          "eth:1:0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
          "eth:1:0x6b175474e89094c44da98b954eedeac495271d0f"
        ],
        "network_id": "1",
        "timestamp": "2023-02-10T13:04:56Z",
        "function_selector": "",
        "l1_block_number": 0,
        "l1_timestamp": 0,
        "deposit_tx": false,
        "system_tx": false,
        "mint": null,
        "sig": {
          "v": "0x0",
          "r": "0x0",
          "s": "0x0"
        },
        "transaction_info": {
          "contract_id": "eth:1:0x6b175474e89094c44da98b954eedeac495271d0f",
          "block_number": 16598541,
          "transaction_id": "0xd9d52b2cb6b6d8d8640bc2dee86050a623401fe39d7fbc4ab46ffd7ff3ea6ab6",
          "contract_address": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "method": "mint",
          "parameters": null,
          "intrinsic_gas": 21620,
          "refund_gas": 0,
          "call_trace": {
            "hash": "0xd9d52b2cb6b6d8d8640bc2dee86050a623401fe39d7fbc4ab46ffd7ff3ea6ab6",
            "contract_name": "Dai",
            "function_name": "mint",
            "function_pc": 3948,
            "function_op": "JUMPDEST",
            "function_file_index": 0,
            "function_code_start": 5501,
            "function_line_number": 134,
            "function_code_length": 202,
            "absolute_position": 88,
            "caller_pc": 0,
            "caller_op": "CALL",
            "call_type": "CALL",
            "from": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
            "from_balance": "0",
            "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "to_balance": "0",
            "value": "0",
            "caller": {
              "address": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
              "balance": "0"
            },
            "block_timestamp": "0001-01-01T00:00:00Z",
            "gas": 7978380,
            "gas_used": 31845,
            "intrinsic_gas": 21620,
            "input": "0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000",
            "decoded_input": [
              {
                "soltype": {
                  "name": "usr",
                  "type": "address",
                  "storage_location": "default",
                  "components": null,
                  "offset": 0,
                  "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                  "indexed": false,
                  "simple_type": {
                    "type": "address"
                  }
                },
                "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1"
              },
              {
                "soltype": {
                  "name": "wad",
                  "type": "uint256",
                  "storage_location": "default",
                  "components": null,
                  "offset": 0,
                  "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                  "indexed": false,
                  "simple_type": {
                    "type": "uint"
                  }
                },
                "value": "2000000000000000000"
              }
            ],
            "nonce_diff": [
              {
                "address": "0xe2E2E2e2e2e2E2E2E2E2e2E2e2E2E2e2e2e2E2e2",
                "original": "0",
                "dirty": "1"
              }
            ],
            "state_diff": [
              {
                "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                "soltype": {
                  "name": "totalSupply",
                  "type": "uint256",
                  "storage_location": "storage",
                  "components": null,
                  "offset": 0,
                  "index": "0x0000000000000000000000000000000000000000000000000000000000000001",
                  "indexed": false,
                  "simple_type": {
                    "type": "uint"
                  }
                },
                "original": "5090814826520179690761462859",
                "dirty": "5090814828520179690761462859",
                "raw": [
                  {
                    "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                    "key": "0x0000000000000000000000000000000000000000000000000000000000000001",
                    "original": "0x0000000000000000000000000000000000000000107305f8bb52a43b529da44b",
                    "dirty": "0x0000000000000000000000000000000000000000107305f8d71411a2a165a44b"
                  }
                ]
              },
              {
                "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                "soltype": {
                  "name": "balanceOf",
                  "type": "mapping (address => uint256)",
                  "storage_location": "storage",
                  "components": null,
                  "offset": 0,
                  "index": "0x0000000000000000000000000000000000000000000000000000000000000002",
                  "indexed": false
                },
                "original": {
                  "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1": "0"
                },
                "dirty": {
                  "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1": "2000000000000000000"
                },
                "raw": [
                  {
                    "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                    "key": "0x9b5472766fd311751f6a33c8e30061e20a26259ca626cf5a2feaadf96903cd9e",
                    "original": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "dirty": "0x0000000000000000000000000000000000000000000000001bc16d674ec80000"
                  }
                ]
              }
            ],
            "logs": [
              {
                "name": "Transfer",
                "anonymous": false,
                "inputs": [
                  {
                    "soltype": {
                      "name": "src",
                      "type": "address",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": true,
                      "simple_type": {
                        "type": "address"
                      }
                    },
                    "value": "0x0000000000000000000000000000000000000000"
                  },
                  {
                    "soltype": {
                      "name": "dst",
                      "type": "address",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": true,
                      "simple_type": {
                        "type": "address"
                      }
                    },
                    "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1"
                  },
                  {
                    "soltype": {
                      "name": "wad",
                      "type": "uint256",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": false,
                      "simple_type": {
                        "type": "uint"
                      }
                    },
                    "value": "2000000000000000000"
                  }
                ],
                "raw": {
                  "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                  "topics": [
                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
                    "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "0x000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1"
                  ],
                  "data": "0x0000000000000000000000000000000000000000000000001bc16d674ec80000"
                }
              }
            ],
            "output": "0x",
            "decoded_output": null,
            "network_id": "1",
            "calls": [
              {
                "hash": "",
                "contract_name": "Dai",
                "function_name": "add",
                "function_pc": 7825,
                "function_op": "JUMPDEST",
                "function_file_index": 0,
                "function_code_start": 3853,
                "function_line_number": 94,
                "function_code_length": 102,
                "absolute_position": 136,
                "caller_pc": 4200,
                "caller_op": "JUMP",
                "caller_file_index": 0,
                "caller_line_number": 135,
                "caller_code_start": 5579,
                "caller_code_length": 24,
                "call_type": "JUMPDEST",
                "from": "0x6b175474e89094c44da98b954eedeac495271d0f",
                "from_balance": null,
                "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
                "to_balance": null,
                "value": null,
                "caller": {
                  "address": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
                  "balance": "0"
                },
                "block_timestamp": "0001-01-01T00:00:00Z",
                "gas": 7973640,
                "gas_used": 62,
                "input": "0x",
                "decoded_input": [
                  {
                    "soltype": {
                      "name": "x",
                      "type": "uint256",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": false,
                      "simple_type": {
                        "type": "uint"
                      }
                    },
                    "value": "0"
                  },
                  {
                    "soltype": {
                      "name": "y",
                      "type": "uint256",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": false,
                      "simple_type": {
                        "type": "uint"
                      }
                    },
                    "value": "2000000000000000000"
                  }
                ],
                "output": "0x",
                "decoded_output": [
                  {
                    "soltype": {
                      "name": "z",
                      "type": "uint256",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": false,
                      "simple_type": {
                        "type": "uint"
                      }
                    },
                    "value": "2000000000000000000"
                  }
                ],
                "network_id": "",
                "calls": null
              },
              {
                "hash": "",
                "contract_name": "Dai",
                "function_name": "add",
                "function_pc": 7825,
                "function_op": "JUMPDEST",
                "function_file_index": 0,
                "function_code_start": 3853,
                "function_line_number": 94,
                "function_code_length": 102,
                "absolute_position": 184,
                "caller_pc": 4279,
                "caller_op": "JUMP",
                "caller_file_index": 0,
                "caller_line_number": 136,
                "caller_code_start": 5630,
                "caller_code_length": 21,
                "call_type": "JUMPDEST",
                "from": "0x6b175474e89094c44da98b954eedeac495271d0f",
                "from_balance": null,
                "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
                "to_balance": null,
                "value": null,
                "caller": {
                  "address": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
                  "balance": "0"
                },
                "block_timestamp": "0001-01-01T00:00:00Z",
                "gas": 7951356,
                "gas_used": 62,
                "input": "0x",
                "decoded_input": [
                  {
                    "soltype": {
                      "name": "x",
                      "type": "uint256",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": false,
                      "simple_type": {
                        "type": "uint"
                      }
                    },
                    "value": "5090814826520179690761462859"
                  },
                  {
                    "soltype": {
                      "name": "y",
                      "type": "uint256",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": false,
                      "simple_type": {
                        "type": "uint"
                      }
                    },
                    "value": "2000000000000000000"
                  }
                ],
                "output": "0x",
                "decoded_output": [
                  {
                    "soltype": {
                      "name": "z",
                      "type": "uint256",
                      "storage_location": "default",
                      "components": null,
                      "offset": 0,
                      "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                      "indexed": false,
                      "simple_type": {
                        "type": "uint"
                      }
                    },
                    "value": "5090814828520179690761462859"
                  }
                ],
                "network_id": "",
                "calls": null
              }
            ]
          },
          "stack_trace": null,
          "logs": [
            {
              "name": "Transfer",
              "anonymous": false,
              "inputs": [
                {
                  "soltype": {
                    "name": "src",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  "value": "0x0000000000000000000000000000000000000000"
                },
                {
                  "soltype": {
                    "name": "dst",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1"
                },
                {
                  "soltype": {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  },
                  "value": "2000000000000000000"
                }
              ],
              "raw": {
                "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                "topics": [
                  "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
                  "0x0000000000000000000000000000000000000000000000000000000000000000",
                  "0x000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1"
                ],
                "data": "0x0000000000000000000000000000000000000000000000001bc16d674ec80000"
              }
            }
          ],
          "balance_diff": null,
          "nonce_diff": [
            {
              "address": "0xe2E2E2e2e2e2E2E2E2E2e2E2e2E2E2e2e2e2E2e2",
              "original": "0",
              "dirty": "1"
            }
          ],
          "state_diff": [
            {
              "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
              "soltype": {
                "name": "totalSupply",
                "type": "uint256",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000001",
                "indexed": false,
                "simple_type": {
                  "type": "uint"
                }
              },
              "original": "5090814826520179690761462859",
              "dirty": "5090814828520179690761462859",
              "raw": [
                {
                  "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                  "key": "0x0000000000000000000000000000000000000000000000000000000000000001",
                  "original": "0x0000000000000000000000000000000000000000107305f8bb52a43b529da44b",
                  "dirty": "0x0000000000000000000000000000000000000000107305f8d71411a2a165a44b"
                }
              ]
            },
            {
              "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
              "soltype": {
                "name": "balanceOf",
                "type": "mapping (address => uint256)",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000002",
                "indexed": false
              },
              "original": {
                "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1": "0"
              },
              "dirty": {
                "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1": "2000000000000000000"
              },
              "raw": [
                {
                  "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
                  "key": "0x9b5472766fd311751f6a33c8e30061e20a26259ca626cf5a2feaadf96903cd9e",
                  "original": "0x0000000000000000000000000000000000000000000000000000000000000000",
                  "dirty": "0x0000000000000000000000000000000000000000000000001bc16d674ec80000"
                }
              ]
            }
          ],
          "raw_state_diff": null,
          "console_logs": null,
          "created_at": "2023-02-10T13:04:56Z"
        },
        "method": "",
        "decoded_input": null,
        "call_trace": [
          {
            "call_type": "CALL",
            "from": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
            "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "gas": 7978380,
            "gas_used": 31845,
            "type": "CALL",
            "input": "0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000"
          }
        ]
      },
      "simulation": {
        "id": "46cb1f92-c9ee-4ef2-8736-6dc6ae84f8d8",
        "project_id": "11686306-12f4-4c48-9396-c07dbe6b3c51",
        "owner_id": "796e7d91-d8a2-4137-af6c-361f34e79557",
        "network_id": "1",
        "block_number": 16598541,
        "transaction_index": 0,
        "from": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
        "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
        "input": "0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000",
        "gas": 8000000,
        "gas_price": "0",
        "gas_used": 53465,
        "value": "0",
        "method": "mint",
        "status": true,
        "access_list": null,
        "queue_origin": "",
        "block_header": {
          "number": "0xfd460d",
          "hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
          "stateRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
          "parentHash": "0x033362dcc958b7c9628256b1a59d7a82c2a7205fc7cb7c3270d08aef8e760e52",
          "sha3Uncles": "0x0000000000000000000000000000000000000000000000000000000000000000",
          "transactionsRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
          "receiptsRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
          "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
          "timestamp": "0x63e640f8",
          "difficulty": "0x0",
          "gasLimit": "0x1c9c380",
          "gasUsed": "0xed3d6a",
          "miner": "0x0000000000000000000000000000000000000000",
          "extraData": "0x",
          "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
          "nonce": "0x0000000000000000",
          "baseFeePerGas": "0x1",
          "size": "0x0",
          "totalDifficulty": "0x0",
          "uncles": null,
          "transactions": null
        },
        "state_overrides": {
          "0x6b175474e89094c44da98b954eedeac495271d0f": {
            "storage": {
              "0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03": "0x0000000000000000000000000000000000000000000000000000000000000001"
            }
          }
        },
        "mint": null,
        "deposit_tx": false,
        "system_tx": false,
        "nonce": 0,
        "addresses": [
          "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
          "0x6b175474e89094c44da98b954eedeac495271d0f"
        ],
        "contract_ids": [
          "eth:1:0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
          "eth:1:0x6b175474e89094c44da98b954eedeac495271d0f"
        ],
        "created_at": "2023-02-10T13:04:57.004109816Z"
      },
      "contracts": [
        {
          "id": "eth:1:0x6b175474e89094c44da98b954eedeac495271d0f",
          "contract_id": "eth:1:0x6b175474e89094c44da98b954eedeac495271d0f",
          "balance": "",
          "network_id": "1",
          "public": true,
          "export": false,
          "verified_by": "etherscan",
          "verification_date": null,
          "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "contract_name": "Dai",
          "ens_domain": null,
          "type": "contract",
          "standard": "erc20",
          "standards": [
            "erc20"
          ],
          "token_data": {
            "symbol": "DAI",
            "name": "Dai Stablecoin",
            "decimals": 18,
            "main": true
          },
          "evm_version": "default",
          "compiler_version": "v0.5.12+commit.7709ece9",
          "optimizations_used": false,
          "optimization_runs": 200,
          "libraries": null,
          "data": {
            "main_contract": 0,
            "contract_info": [
              {
                "id": 0,
                "path": "Dai.sol",
                "name": "Dai.sol",
                "source": "// hevm: flattened sources of /nix/store/8xb41r4qd0cjb63wcrxf1qmfg88p0961-dss-6fd7de0/src/dai.sol\npragma solidity =0.5.12;\n\n////// /nix/store/8xb41r4qd0cjb63wcrxf1qmfg88p0961-dss-6fd7de0/src/lib.sol\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n\n// You should have received a copy of the GNU General Public License\n// along with this program.  If not, see <http://www.gnu.org/licenses/>.\n\n/* pragma solidity 0.5.12; */\n\ncontract LibNote {\n    event LogNote(\n        bytes4   indexed  sig,\n        address  indexed  usr,\n        bytes32  indexed  arg1,\n        bytes32  indexed  arg2,\n        bytes             data\n    ) anonymous;\n\n    modifier note {\n        _;\n        assembly {\n            // log an 'anonymous' event with a constant 6 words of calldata\n            // and four indexed topics: selector, caller, arg1 and arg2\n            let mark := msize                         // end of memory ensures zero\n            mstore(0x40, add(mark, 288))              // update free memory pointer\n            mstore(mark, 0x20)                        // bytes type data offset\n            mstore(add(mark, 0x20), 224)              // bytes size (padded)\n            calldatacopy(add(mark, 0x40), 0, 224)     // bytes payload\n            log4(mark, 288,                           // calldata\n                 shl(224, shr(224, calldataload(0))), // msg.sig\n                 caller,                              // msg.sender\n                 calldataload(4),                     // arg1\n                 calldataload(36)                     // arg2\n                )\n        }\n    }\n}\n\n////// /nix/store/8xb41r4qd0cjb63wcrxf1qmfg88p0961-dss-6fd7de0/src/dai.sol\n// Copyright (C) 2017, 2018, 2019 dbrock, rain, mrchico\n\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU Affero General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU Affero General Public License for more details.\n//\n// You should have received a copy of the GNU Affero General Public License\n// along with this program.  If not, see <https://www.gnu.org/licenses/>.\n\n/* pragma solidity 0.5.12; */\n\n/* import \"./lib.sol\"; */\n\ncontract Dai is LibNote {\n    // --- Auth ---\n    mapping (address => uint) public wards;\n    function rely(address guy) external note auth { wards[guy] = 1; }\n    function deny(address guy) external note auth { wards[guy] = 0; }\n    modifier auth {\n        require(wards[msg.sender] == 1, \"Dai/not-authorized\");\n        _;\n    }\n\n    // --- ERC20 Data ---\n    string  public constant name     = \"Dai Stablecoin\";\n    string  public constant symbol   = \"DAI\";\n    string  public constant version  = \"1\";\n    uint8   public constant decimals = 18;\n    uint256 public totalSupply;\n\n    mapping (address => uint)                      public balanceOf;\n    mapping (address => mapping (address => uint)) public allowance;\n    mapping (address => uint)                      public nonces;\n\n    event Approval(address indexed src, address indexed guy, uint wad);\n    event Transfer(address indexed src, address indexed dst, uint wad);\n\n    // --- Math ---\n    function add(uint x, uint y) internal pure returns (uint z) {\n        require((z = x + y) >= x);\n    }\n    function sub(uint x, uint y) internal pure returns (uint z) {\n        require((z = x - y) <= x);\n    }\n\n    // --- EIP712 niceties ---\n    bytes32 public DOMAIN_SEPARATOR;\n    // bytes32 public constant PERMIT_TYPEHASH = keccak256(\"Permit(address holder,address spender,uint256 nonce,uint256 expiry,bool allowed)\");\n    bytes32 public constant PERMIT_TYPEHASH = 0xea2aa0a1be11a07ed86d755c93467f4f82362b452371d1ba94d1715123511acb;\n\n    constructor(uint256 chainId_) public {\n        wards[msg.sender] = 1;\n        DOMAIN_SEPARATOR = keccak256(abi.encode(\n            keccak256(\"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\"),\n            keccak256(bytes(name)),\n            keccak256(bytes(version)),\n            chainId_,\n            address(this)\n        ));\n    }\n\n    // --- Token ---\n    function transfer(address dst, uint wad) external returns (bool) {\n        return transferFrom(msg.sender, dst, wad);\n    }\n    function transferFrom(address src, address dst, uint wad)\n        public returns (bool)\n    {\n        require(balanceOf[src] >= wad, \"Dai/insufficient-balance\");\n        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {\n            require(allowance[src][msg.sender] >= wad, \"Dai/insufficient-allowance\");\n            allowance[src][msg.sender] = sub(allowance[src][msg.sender], wad);\n        }\n        balanceOf[src] = sub(balanceOf[src], wad);\n        balanceOf[dst] = add(balanceOf[dst], wad);\n        emit Transfer(src, dst, wad);\n        return true;\n    }\n    function mint(address usr, uint wad) external auth {\n        balanceOf[usr] = add(balanceOf[usr], wad);\n        totalSupply    = add(totalSupply, wad);\n        emit Transfer(address(0), usr, wad);\n    }\n    function burn(address usr, uint wad) external {\n        require(balanceOf[usr] >= wad, \"Dai/insufficient-balance\");\n        if (usr != msg.sender && allowance[usr][msg.sender] != uint(-1)) {\n            require(allowance[usr][msg.sender] >= wad, \"Dai/insufficient-allowance\");\n            allowance[usr][msg.sender] = sub(allowance[usr][msg.sender], wad);\n        }\n        balanceOf[usr] = sub(balanceOf[usr], wad);\n        totalSupply    = sub(totalSupply, wad);\n        emit Transfer(usr, address(0), wad);\n    }\n    function approve(address usr, uint wad) external returns (bool) {\n        allowance[msg.sender][usr] = wad;\n        emit Approval(msg.sender, usr, wad);\n        return true;\n    }\n\n    // --- Alias ---\n    function push(address usr, uint wad) external {\n        transferFrom(msg.sender, usr, wad);\n    }\n    function pull(address usr, uint wad) external {\n        transferFrom(usr, msg.sender, wad);\n    }\n    function move(address src, address dst, uint wad) external {\n        transferFrom(src, dst, wad);\n    }\n\n    // --- Approve by signature ---\n    function permit(address holder, address spender, uint256 nonce, uint256 expiry,\n                    bool allowed, uint8 v, bytes32 r, bytes32 s) external\n    {\n        bytes32 digest =\n            keccak256(abi.encodePacked(\n                \"\\x19\\x01\",\n                DOMAIN_SEPARATOR,\n                keccak256(abi.encode(PERMIT_TYPEHASH,\n                                     holder,\n                                     spender,\n                                     nonce,\n                                     expiry,\n                                     allowed))\n        ));\n\n        require(holder != address(0), \"Dai/invalid-address-0\");\n        require(holder == ecrecover(digest, v, r, s), \"Dai/invalid-permit\");\n        require(expiry == 0 || now <= expiry, \"Dai/permit-expired\");\n        require(nonce == nonces[holder]++, \"Dai/invalid-nonce\");\n        uint wad = allowed ? uint(-1) : 0;\n        allowance[holder][spender] = wad;\n        emit Approval(holder, spender, wad);\n    }\n}"
              }
            ],
            "abi": [
              {
                "type": "constructor",
                "name": "",
                "constant": false,
                "anonymous": false,
                "stateMutability": "",
                "inputs": [
                  {
                    "name": "chainId_",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": null
              },
              {
                "type": "function",
                "name": "totalSupply",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [],
                "outputs": [
                  {
                    "name": "",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "move",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "src",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "dst",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "function",
                "name": "name",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [],
                "outputs": [
                  {
                    "name": "",
                    "type": "string",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "string"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "wards",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [
                  {
                    "name": "",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  }
                ],
                "outputs": [
                  {
                    "name": "",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "approve",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "usr",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": [
                  {
                    "name": "",
                    "type": "bool",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bool"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "mint",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "usr",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "function",
                "name": "transferFrom",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "src",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "dst",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": [
                  {
                    "name": "",
                    "type": "bool",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bool"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "burn",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "usr",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "function",
                "name": "deny",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "guy",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "function",
                "name": "push",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "usr",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "function",
                "name": "nonces",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [
                  {
                    "name": "",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  }
                ],
                "outputs": [
                  {
                    "name": "",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "symbol",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [],
                "outputs": [
                  {
                    "name": "",
                    "type": "string",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "string"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "allowance",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [
                  {
                    "name": "",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  }
                ],
                "outputs": [
                  {
                    "name": "",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "balanceOf",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [
                  {
                    "name": "",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  }
                ],
                "outputs": [
                  {
                    "name": "",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "version",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [],
                "outputs": [
                  {
                    "name": "",
                    "type": "string",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "string"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "PERMIT_TYPEHASH",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [],
                "outputs": [
                  {
                    "name": "",
                    "type": "bytes32",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bytes"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "transfer",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "dst",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": [
                  {
                    "name": "",
                    "type": "bool",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bool"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "decimals",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [],
                "outputs": [
                  {
                    "name": "",
                    "type": "uint8",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "DOMAIN_SEPARATOR",
                "constant": true,
                "anonymous": false,
                "stateMutability": "view",
                "inputs": [],
                "outputs": [
                  {
                    "name": "",
                    "type": "bytes32",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bytes"
                    }
                  }
                ]
              },
              {
                "type": "function",
                "name": "permit",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "holder",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "spender",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "nonce",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  },
                  {
                    "name": "expiry",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  },
                  {
                    "name": "allowed",
                    "type": "bool",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bool"
                    }
                  },
                  {
                    "name": "v",
                    "type": "uint8",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  },
                  {
                    "name": "r",
                    "type": "bytes32",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bytes"
                    }
                  },
                  {
                    "name": "s",
                    "type": "bytes32",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bytes"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "function",
                "name": "pull",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "usr",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "function",
                "name": "rely",
                "constant": false,
                "anonymous": false,
                "stateMutability": "nonpayable",
                "inputs": [
                  {
                    "name": "guy",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "address"
                    }
                  }
                ],
                "outputs": []
              },
              {
                "type": "event",
                "name": "Approval",
                "constant": false,
                "anonymous": false,
                "stateMutability": "",
                "inputs": [
                  {
                    "name": "src",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "guy",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": null
              },
              {
                "type": "event",
                "name": "LogNote",
                "constant": false,
                "anonymous": true,
                "stateMutability": "",
                "inputs": [
                  {
                    "name": "sig",
                    "type": "bytes4",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "bytes"
                    }
                  },
                  {
                    "name": "usr",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "arg1",
                    "type": "bytes32",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "bytes"
                    }
                  },
                  {
                    "name": "arg2",
                    "type": "bytes32",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "bytes"
                    }
                  },
                  {
                    "name": "data",
                    "type": "bytes",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "bytes"
                    }
                  }
                ],
                "outputs": null
              },
              {
                "type": "event",
                "name": "Transfer",
                "constant": false,
                "anonymous": false,
                "stateMutability": "",
                "inputs": [
                  {
                    "name": "src",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "dst",
                    "type": "address",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": true,
                    "simple_type": {
                      "type": "address"
                    }
                  },
                  {
                    "name": "wad",
                    "type": "uint256",
                    "storage_location": "default",
                    "components": null,
                    "offset": 0,
                    "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                    "indexed": false,
                    "simple_type": {
                      "type": "uint"
                    }
                  }
                ],
                "outputs": null
              }
            ],
            "raw_abi": null,
            "states": [
              {
                "name": "DOMAIN_SEPARATOR",
                "type": "bytes32",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000005",
                "indexed": false,
                "simple_type": {
                  "type": "bytes"
                }
              },
              {
                "name": "wards",
                "type": "mapping (address => uint256)",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000000",
                "indexed": false
              },
              {
                "name": "totalSupply",
                "type": "uint256",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000001",
                "indexed": false,
                "simple_type": {
                  "type": "uint"
                }
              },
              {
                "name": "balanceOf",
                "type": "mapping (address => uint256)",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000002",
                "indexed": false
              },
              {
                "name": "allowance",
                "type": "mapping (address => mapping (address => uint256))",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000003",
                "indexed": false
              },
              {
                "name": "nonces",
                "type": "mapping (address => uint256)",
                "storage_location": "storage",
                "components": null,
                "offset": 0,
                "index": "0x0000000000000000000000000000000000000000000000000000000000000004",
                "indexed": false
              }
            ]
          },
          "creation_block": 0,
          "creation_tx": "",
          "creator_address": "",
          "created_at": "2022-12-16T09:10:37Z",
          "number_of_watches": null,
          "language": "solidity",
          "in_project": false,
          "number_of_files": 1
        }
      ],
      "generated_access_list": []
    }
    ```
  </Tab>
</Tabs>

## Storage Slot Calculation

The key part of setting an override is calculating the correct storage location. This depends on the structure of the contract's storage and the specific variable you want to override.

For the DAI contract, the storage location for the `wards` mapping for our address is calculated based on the [Solidity storage layout rules](https://docs.soliditylang.org/en/latest/internals/layout_in_storage.html#mappings-and-dynamic-arrays), and is given by this expression:

```js title="example.js" showLineNumbers theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
const fakeWardAddress = '0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2';
const overrideStorageLocation = keccak256(
  concatenate(
    hexZeroPad(fakeWardAddress), hexZeroPad(0x0)
  )
)
```

In our example, the storage location is:  `0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03`.

## Explore

<Card title="How to override Gnosis Safe contracts" href="" />