MEV Protection

MEV protection refers to a broad set of strategies that keep users safe from price manipulation when trading, providing liquidity, minting NFTs, and more.

This section guides how users can perform MEV-protected transactions on Ethereum mainnet, be it swapping, token transferring, or liquidity provisioning, and will be achieved using Flashbots.

Enabling MEV Protection involves passing the raw transaction generated from any of the blockchain POST transactions.

API URL: https://api.expand.network/chain/sendtransaction

---

Sample Request:

{
    "chainId":"1",
    "rawTransaction": "0xf8a68205180f82753e94dc31ee1784292379fbb2964b3b9c4124d8f89c6080b844a9059cbb000000000000000000000000a67e9b68c41b0f26184d64c26e0b2b81466e5994000000000000000000000000000000000000000000000000000000174876e8002ea0952b0468aff066f3e00a1d476b8894d84bfc47a1a3cdab9d6809a3461cc713e5a018219ee382aa3c7edf73a87bd8a75e2c40a97efbdf56a6cfd353af06fb74101d",
    "mevProtection": true
}

---

Sample Response:

{
    "status": 200,
    "msg": "success",
    "data": {
        "txHash": "0xd9cdf1483a85aa206625c66fea49059b96ffae1c086f76664cfa3f91a495d73a"
    }
}

Users can fetch Flashbot blocks, transactions, and bundle data using the following endpoints:

1. API URL: https://api.expand.network/chain/getflashbotblocks

Sample Request:

https://api.expand.network/chain/getflashbotblocks?chainId=1

Sample Response:

{
  "status": 200,
  "msg": "success",
  "data": {
      "totalPages": "535",
      "currentPage": "509",
      "transactions":[
        {
          "block_signed_at": "2023-11-21T12:04:47Z",
          "block_height": 18620016,
          "block_hash": "0x1e424e1f2037a4a4bb89cc2614f5ebbba61612806f665f9c9c712a08d284c699",
          "tx_hash": "0xd57f92e13f0fad7d6a7540f55cc653d584793aea27be935c78df5759845eaad4",
          "tx_offset": 119,
          "successful": true,
          "miner_address": "0x95222290dd7278aa3ddd389cc1e1d165cc4bafe5",
          "from_address": "0x95222290dd7278aa3ddd389cc1e1d165cc4bafe5",
          "from_address_label": null,
          "to_address": "0x388c818ca8b9251b393131c08a736a67ccb19297",
          "to_address_label": null,
          "value": "25407585008794343",
          "value_quote": 49.371036777116664,
          "pretty_value_quote": "$49.37",
          "gas_metadata": {
              "contract_decimals": 18,
              "contract_name": "Ether",
              "contract_ticker_symbol": "ETH",
              "contract_address": "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
              "supports_erc": null,
              "logo_url": "https://www.datocms-assets.com/86369/1669653891-eth.svg"
          },
          "gas_offered": 32000,
          "gas_spent": 22111,
          "gas_price": 26280311476,
          "fees_paid": "581083967045836",
          "gas_quote": 1.1291398965184127,
          "pretty_gas_quote": "$1.13",
          "gas_quote_rate": 1943.1613339098476,
          "explorers": [
              {
                  "label": null,
                  "url": "https://etherscan.io/tx/0xd57f92e13f0fad7d6a7540f55cc653d584793aea27be935c78df5759845eaad4"
              }
          ]
      }
      ]
  }
}

---

2. API URL: https://api.expand.network/chain/getflashbottransactions

Sample Request:

https://api.expand.network/chain/getflashbottransactions?chainId=1

Sample Response:

{
    "status": 200,
    "msg": "success",
    "data": {
        "transactions": [
            {
                "transaction_hash": "0xbcf55b7e9488135c12f3e70bd2a191cc19913475de6937f54cb9843865416391",
                "tx_index": 0,
                "bundle_index": 21,
                "block_number": 18975317,
                "eao_address": "0x2aC74Bd02EE017fa05629432Dd3728720c455032",
                "to_address": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
                "gas_used": 30428,
                "gas_price": "10000002",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "304280060856",
                "fee_recipient_eth_diff": "304280060856"
            },
            {
                "transaction_hash": "0xd441a44e2adf57f0d53e027d4441cdfee8653cd7f259ec0c90b60ea144b31d32",
                "tx_index": 0,
                "bundle_index": 20,
                "block_number": 18975317,
                "eao_address": "0x758aC3DC8FB6F939adf42bB83e717f94619052f5",
                "to_address": "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789",
                "gas_used": 118712,
                "gas_price": "11300000",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "1341445600000",
                "fee_recipient_eth_diff": "1341445600000"
            },
            {
                "transaction_hash": "0x02cbeb153f91225abcdad3cd4d39d457b5e13f3fb1191f26c73c328c50f54071",
                "tx_index": 0,
                "bundle_index": 19,
                "block_number": 18975317,
                "eao_address": "0x4a25D28d10B02BCF13a16068F56d167D8F96d093",
                "to_address": "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789",
                "gas_used": 181502,
                "gas_price": "12500000",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "2268775000000",
                "fee_recipient_eth_diff": "2268775000000"
            },
            {
                "transaction_hash": "0x2b89ed3dbfe8946229468f33e31ed447631c192906344b7c62b6e927a7a5a512",
                "tx_index": 12,
                "bundle_index": 18,
                "block_number": 18975317,
                "eao_address": "0x4960DC043DDc244A02192898B3e2F1730194F0ac",
                "to_address": "0xf2B2420CEff184EEc76B3de15bd90C5734e45449",
                "gas_used": 21000,
                "gas_price": "10000001",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "210000021000",
                "fee_recipient_eth_diff": "210000021000"
            }
        ],
        "latest_block_number": 18975317
    }
}

---

3. API URL: https://api.expand.network/chain/getflashbotbundle

Sample Request:

https://api.expand.network/chain/getflashbotbundle?bundleHash=0x2228f5d8954ce31dc1601a8ba264dbd401bf1428388ce88238932815c5d6f23f

Sample Response:

{
    "status": 200,
    "msg": "success",
    "data": {
        "transactions": [
            {
                "transaction_hash": "0xd9cdf1483a85aa206625c66fea49059b96ffae1c086f76664cfa3f91a495d73a",
                "tx_index": 0,
                "bundle_index": 3,
                "block_number": 9091437,
                "eao_address": "0x8D460B72eaF3d63830E16C22d1Fc6908D0834Abe",
                "to_address": "0x8D460B72eaF3d63830E16C22d1Fc6908D0834Abe",
                "gas_used": 21000,
                "gas_price": "1000000000",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "21000000000000",
                "fee_recipient_eth_diff": "21000000000000"
            }
        ]
    }
}