捆绑模拟

模拟捆绑（Simulation Bundles）允许您连续模拟多笔交易。例如，为了在模拟目标交易之前设置特定条件，您需要先执行其他若干笔交易。 Simulation API 和 Simulation RPC 均支持捆绑模拟。端点会接收一个交易数组，并在同一区块内依次模拟这些交易。

RPC 捆绑模拟

Node RPC 允许您读取区块链数据并发送交易。但您也可以通过单个 RPC URL 在 Node 上模拟捆绑交易。通过 RPC 进行的模拟仅在受支持的网络上可用。如果您的网络不受 Node 支持，请改为通过 Simulation API 运行捆绑模拟。从 Dashboard 获取 RPC URL。前往 Node > Copy HTTPS URL 复制所需网络的 URL。

example

https://mainnet.gateway.tenderly.co/$TENDERLY_NODE_ACCESS_KEY

要通过 RPC 模拟捆绑交易，请调用 tenderly_simulateBundle 方法。该自定义方法允许您通过将多笔交易作为数组传递来对其进行模拟。请参阅 RPC 参考。

交易会在同一区块内依次进行模拟。

示例

example
response.json

example

curl https://mainnet.gateway.tenderly.co/$TENDERLY_NODE_ACCESS_KEY \
  -X POST \
  -H "Content-Type: application/json" \
  -d \
  '{
    "id": 0,
    "jsonrpc": "2.0",
    "method": "tenderly_simulateBundle",
    "params": [
      [
        {
          "from": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
          "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "data": "0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000"
        },
        {
          "from": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
          "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "gas": "0x7a1200",
          "data": "0x095ea7b3000000000000000000000000f7ddedc66b1d482e5c38e4730b3357d32411e5dd0000000000000000000000000000000000000000000000000de0b6b3a7640000"
        },
        {
          "from": "0xf7ddedc66b1d482e5c38e4730b3357d32411e5dd",
          "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "gas": "0x7a1200",
          "data": "0x23b872dd000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1000000000000000000000000bd8daa414fda8a8a129f7035e7496759c5af8570000000000000000000000000000000000000000000000000006a94d74f430000"
        }
      ],
      "latest",
      {
        "0x6b175474e89094c44da98b954eedeac495271d0f": {
          "stateDiff": {
            "0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03": "0x0000000000000000000000000000000000000000000000000000000000000001"
          }
        }
      }
    ]
  }'

response.json

{
  "id": 0,
  "jsonrpc": "2.0",
  "result": [
    {
      "status": true,
      "gasUsed": "0xd0d9",
      "cumulativeGasUsed": "0x0",
      "blockNumber": "0x121c950",
      "type": "0x0",
      "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000010000000020000000000000000000800000000000000000000000010000000000000000000004000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000020000000002000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000",
      "logs": [
        {
          "name": "Transfer",
          "anonymous": false,
          "inputs": [
            {
              "value": "0x0000000000000000000000000000000000000000",
              "type": "address",
              "name": "src"
            },
            {
              "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
              "type": "address",
              "name": "dst"
            },
            {
              "value": "2000000000000000000",
              "type": "uint256",
              "name": "wad"
            }
          ],
          "raw": {
            "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "topics": [
              "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
              "0x0000000000000000000000000000000000000000000000000000000000000000",
              "0x000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1"
            ],
            "data": "0x0000000000000000000000000000000000000000000000001bc16d674ec80000"
          }
        }
      ],
      "trace": [
        {
          "type": "CALL",
          "from": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
          "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "gas": "0xbeb6d8c",
          "gasUsed": "0x7c65",
          "value": "0x0",
          "input": "0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000",
          "decodedInput": [
            {
              "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
              "type": "address",
              "name": "usr"
            },
            {
              "value": "2000000000000000000",
              "type": "uint256",
              "name": "wad"
            }
          ],
          "method": "mint",
          "output": "0x",
          "subtraces": 0,
          "traceAddress": []
        }
      ],
      "assetChanges": [
        {
          "assetInfo": {
            "standard": "ERC20",
            "type": "Fungible",
            "contractAddress": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "symbol": "dai",
            "name": "Dai",
            "logo": "https://assets.coingecko.com/coins/images/9956/large/Badge_Dai.webp?1696509996",
            "decimals": 18,
            "dollarValue": "0.9996880292892456"
          },
          "type": "Mint",
          "to": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
          "rawAmount": "0x1bc16d674ec80000",
          "amount": "2",
          "dollarValue": "1.9993760585784912109"
        }
      ],
      "balanceChanges": [
        {
          "address": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
          "dollarValue": "1.9993760585784912109",
          "transfers": [
            0
          ]
        }
      ]
    },
    {
      "status": true,
      "gasUsed": "0xb442",
      "cumulativeGasUsed": "0x0",
      "blockNumber": "0x121c950",
      "type": "0x0",
      "logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000200000000000000000000000000008000000000000000000000000000000000000000010000000000000000000020000000000000000000000000000000000000000000000000000004000800000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000002000000000000000000000000100010000000000000000000000000000000000000000000000000000000000000",
      "logs": [
        {
          "name": "Approval",
          "anonymous": false,
          "inputs": [
            {
              "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
              "type": "address",
              "name": "src"
            },
            {
              "value": "0xf7ddedc66b1d482e5c38e4730b3357d32411e5dd",
              "type": "address",
              "name": "guy"
            },
            {
              "value": "1000000000000000000",
              "type": "uint256",
              "name": "wad"
            }
          ],
          "raw": {
            "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "topics": [
              "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
              "0x000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1",
              "0x000000000000000000000000f7ddedc66b1d482e5c38e4730b3357d32411e5dd"
            ],
            "data": "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000"
          }
        }
      ],
      "trace": [
        {
          "type": "CALL",
          "from": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
          "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "gas": "0x79bd80",
          "gasUsed": "0x5fc2",
          "value": "0x0",
          "input": "0x095ea7b3000000000000000000000000f7ddedc66b1d482e5c38e4730b3357d32411e5dd0000000000000000000000000000000000000000000000000de0b6b3a7640000",
          "decodedInput": [
            {
              "value": "0xf7ddedc66b1d482e5c38e4730b3357d32411e5dd",
              "type": "address",
              "name": "usr"
            },
            {
              "value": "1000000000000000000",
              "type": "uint256",
              "name": "wad"
            }
          ],
          "method": "approve",
          "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
          "decodedOutput": [
            {
              "value": true,
              "type": "bool",
              "name": ""
            }
          ],
          "subtraces": 0,
          "traceAddress": []
        }
      ]
    },
    {
      "status": true,
      "gasUsed": "0xe38b",
      "cumulativeGasUsed": "0x0",
      "blockNumber": "0x121c950",
      "type": "0x0",
      "logsBloom": "0x00000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000010000000000000000000004000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000000000000000002000000000000000000020000000002000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000",
      "logs": [
        {
          "name": "Transfer",
          "anonymous": false,
          "inputs": [
            {
              "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
              "type": "address",
              "name": "src"
            },
            {
              "value": "0xbd8daa414fda8a8a129f7035e7496759c5af8570",
              "type": "address",
              "name": "dst"
            },
            {
              "value": "30000000000000000",
              "type": "uint256",
              "name": "wad"
            }
          ],
          "raw": {
            "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "topics": [
              "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
              "0x000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1",
              "0x000000000000000000000000bd8daa414fda8a8a129f7035e7496759c5af8570"
            ],
            "data": "0x000000000000000000000000000000000000000000000000006a94d74f430000"
          }
        }
      ],
      "trace": [
        {
          "type": "CALL",
          "from": "0xf7ddedc66b1d482e5c38e4730b3357d32411e5dd",
          "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
          "gas": "0x79bc28",
          "gasUsed": "0x8db3",
          "value": "0x0",
          "input": "0x23b872dd000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1000000000000000000000000bd8daa414fda8a8a129f7035e7496759c5af8570000000000000000000000000000000000000000000000000006a94d74f430000",
          "decodedInput": [
            {
              "value": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
              "type": "address",
              "name": "src"
            },
            {
              "value": "0xbd8daa414fda8a8a129f7035e7496759c5af8570",
              "type": "address",
              "name": "dst"
            },
            {
              "value": "30000000000000000",
              "type": "uint256",
              "name": "wad"
            }
          ],
          "method": "transferFrom",
          "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
          "decodedOutput": [
            {
              "value": true,
              "type": "bool",
              "name": ""
            }
          ],
          "subtraces": 0,
          "traceAddress": []
        }
      ],
      "assetChanges": [
        {
          "assetInfo": {
            "standard": "ERC20",
            "type": "Fungible",
            "contractAddress": "0x6b175474e89094c44da98b954eedeac495271d0f",
            "symbol": "dai",
            "name": "Dai",
            "logo": "https://assets.coingecko.com/coins/images/9956/large/Badge_Dai.webp?1696509996",
            "decimals": 18,
            "dollarValue": "0.9996880292892456"
          },
          "type": "Transfer",
          "from": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
          "to": "0xbd8daa414fda8a8a129f7035e7496759c5af8570",
          "rawAmount": "0x6a94d74f430000",
          "amount": "0.03",
          "dollarValue": "0.029990640878677368163"
        }
      ],
      "balanceChanges": [
        {
          "address": "0xbd8daa414fda8a8a129f7035e7496759c5af8570",
          "dollarValue": "0.029990640878677368163",
          "transfers": [
            0
          ]
        },
        {
          "address": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
          "dollarValue": "-0.029990640878677368163",
          "transfers": [
            0
          ]
        }
      ]
    }
  ]
}

API 捆绑模拟

使用 simulate-bundle API 端点一次性模拟多笔连续的交易。请参阅 API 参考。

example

https://api.tenderly.co/api/v1/account/${TENDERLY_ACCOUNT_SLUG}/project/${TENDERLY_PROJECT_SLUG}/simulate-bundle

模拟输出显示了如果您将该交易发送到区块链上时可能引发的事件和状态变化。如果某笔交易失败，将提前返回，包含直至失败点的所有模拟结果。示例

Shell
request.ts

curl --request POST \
  --url https://api.tenderly.co/api/v1/account/me/project/project/simulate-bundle \
  --header 'Accept: application/json' \
  --header 'Content-Type: application/json' \
  --header "X-Access-Key: $TENDERLY_ACCESS_KEY" \
  --data '{
  "simulations": [
    {
      "network_id": "1",
      "save": true,
      "save_if_fails": true,
      "simulation_type": "full",
      "from": "0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2",
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "input": "0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000",
      "state_objects": {
        "0x6b175474e89094c44da98b954eedeac495271d0f": {
          "storage": {
            "0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03": "0x0000000000000000000000000000000000000000000000000000000000000001"
          }
        }
      }
    },
    {
      "network_id": "1",
      "save": true,
      "save_if_fails": true,
      "simulation_type": "full",
      "from": "0xe58b9ee93700a616b50509c8292977fa7a0f8ce1",
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "input": "0x095ea7b3000000000000000000000000f7ddedc66b1d482e5c38e4730b3357d32411e5dd0000000000000000000000000000000000000000000000000de0b6b3a7640000"
    },
    {
      "network_id": "1",
      "save": true,
      "save_if_fails": true,
      "simulation_type": "full",
      "from": "0xf7ddedc66b1d482e5c38e4730b3357d32411e5dd",
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "input": "0x23b872dd000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1000000000000000000000000bd8daa414fda8a8a129f7035e7496759c5af8570000000000000000000000000000000000000000000000000006a94d74f430000"
    }
  ]
}'

request.ts

dotenv.config();

// assuming environment variables TENDERLY_ACCOUNT_SLUG, TENDERLY_PROJECT_SLUG and TENDERLY_ACCESS_KEY are set
const { TENDERLY_ACCOUNT_SLUG, TENDERLY_PROJECT_SLUG, TENDERLY_ACCESS_KEY } = process.env;

const batchedSimulations = async () => {
  console.time('Batch Simulation');

  const daiSequence = (
    await axios.post(
      `https://api.tenderly.co/api/v1/account/${TENDERLY_ACCOUNT_SLUG}/project/${TENDERLY_PROJECT_SLUG}/simulate-bundle`,
      // the transaction
      {
        simulations: getTxSequence().map((transaction) => ({
          network_id: '1', // network to simulate on
          save: true,
          save_if_fails: true,
          simulation_type: 'full',
          ...transaction,
        })),
      },
      {
        headers: {
          'X-Access-Key': TENDERLY_ACCESS_KEY as string,
        },
      },
    )
  ).data;
  console.timeEnd('Batch Simulation');
  console.log(JSON.stringify(daiSequence, null, 2));
};

function getTxSequence() {
  const fakeWardAddress = '0xe2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2';
  const daiOwner = 'e58b9ee93700a616b50509c8292977fa7a0f8ce1';
  const daiSpend = 'f7ddedc66b1d482e5c38e4730b3357d32411e5dd';
  const daiRecip = 'e58b9ee93700a616b50509c8292977fa7a0f8ce1';
  const daiContract = '0x6b175474e89094c44da98b954eedeac495271d0f';
  return [
    // TX1: Mint 2 DAI for e58b9ee93700a616b50509c8292977fa7a0f8ce1.
    // Must do state override so sender (from) is considered a ward for this simulation
    {
      from: fakeWardAddress,
      to: '0x6b175474e89094c44da98b954eedeac495271d0f',
      input:
        '0x40c10f19000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce10000000000000000000000000000000000000000000000001bc16d674ec80000',
      // make 0xcace477c66b1f2e151974eeada9ac8b95a31c50593ae1db2f048f0a2b54c1424 a ward
      state_objects: {
        '0x6b175474e89094c44da98b954eedeac495271d0f': {
          storage: {
            '0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03':
              '0x0000000000000000000000000000000000000000000000000000000000000001',
          },
        },
      },
    },
    // TX2: e58b9ee93700a616b50509c8292977fa7a0f8ce1 approves 1 DAI to f7ddedc66b1d482e5c38e4730b3357d32411e5dd
    {
      from: '0xe58b9ee93700a616b50509c8292977fa7a0f8ce1',
      to: '0x6b175474e89094c44da98b954eedeac495271d0f',
      input:
        '0x095ea7b3000000000000000000000000f7ddedc66b1d482e5c38e4730b3357d32411e5dd0000000000000000000000000000000000000000000000000de0b6b3a7640000',
    },
    {
      // TX3: 0xf7ddedc66b1d482e5c38e4730b3357d32411e5dd calls transferFrom to transfer 0.5 DAI belonging to e58b9ee93700a616b50509c8292977fa7a0f8ce1, sending them to e58b9ee93700a616b50509c8292977fa7a0f8ce1
      from: '0xf7ddedc66b1d482e5c38e4730b3357d32411e5dd',
      to: '0x6b175474e89094c44da98b954eedeac495271d0f',
      input:
        '0x23b872dd000000000000000000000000e58b9ee93700a616b50509c8292977fa7a0f8ce1000000000000000000000000bd8daa414fda8a8a129f7035e7496759c5af8570000000000000000000000000000000000000000000000000006a94d74f430000',
    },
  ];
}

function getWardStorageLocation(wardAddress: string) {
  // calculate the storage location of `wards[wardAddress]`
  // yields 0xedd7d04419e9c48ceb6055956cbb4e2091ae310313a4d1fa7cbcfe7561616e03
  return ethers.utils.keccak256(
    ethers.utils.concat([
      ethers.utils.hexZeroPad(wardAddress, 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
    ]),
  );
}

batchedSimulations();

探索使用场景

资产与余额变化：获取即将发生的所有余额与资产变化的确切美元价值。
Gas 估算：在发送交易之前准确预测 gas 费用。
状态覆盖：修改时间戳、合约数据等区块链状态，以测试不同的场景。
预览交易结果：识别并修复可能导致交易失败的问题。

RPC 捆绑模拟

API 捆绑模拟

探索使用场景

后续内容

单笔模拟

通过 SDK 模拟

​RPC 捆绑模拟

​API 捆绑模拟

​探索使用场景

​后续内容

单笔模拟

通过 SDK 模拟

RPC 捆绑模拟

API 捆绑模拟

探索使用场景

后续内容