Subscribe Bundle

Introduction

Currently, Searcher can receive bundle stream from Scutum without subscribing to a plan.

The bundle stream of Scutum is based on the SSE protocol and pushed uniformly in the form of a bundle, including transactions submitted via eth_sendRawTransaction and bundles submitted via eth_sendMevBundle. Transactions in the data stream are uniformly desensitized and only authorized transaction data is disclosed.

Searcher can obtain data through the RPC endpoint to execute the backrun strategy. To avoid data interruption due to network fluctuations, it is recommended to establish a reconnection mechanism.

RPC Endpoint

Ethereum:https://eth.blockrazor.xyz/stream

BSC:https://bsc.blockrazor.xyz/stream

Rate Limit

Data stream limit:5 Streams / IP

Bundle Type

Raw Bundle

Raw Bundle refers to the bundle that has not been implemented by Scutum's Searcher with the backrun strategy. Transactions in Raw Bundle come from two channels.

Transactions submitted through eth_sendRawTransaction will be automatically constructed as a bundle by Scutum and pushed to Searcher to execute the backrun strategy. The Raw Bundle in this scenario only contains one transaction;

For the Raw Bundle submitted through eth_sendMevBundle, the transactions come from the public mempool or are self-constructed. The Raw Bundle in this scenario can contain up to 50 transactions.

First Backrun Bundle

After the Searcher executes the backrun strategy on Raw Bundle, it can choose to continue to disclose the bundle to other Searchers to execute the nested backrun strategy. At this time, the bundle disclosed to the data flow is the First Backrun Bundle, which contains all transactions in Raw Bundle, and one backrun transaction.

Data Stream Structure

Bundle

txs

log

state

the default data stream does not contain state field, if you need it, please modify the url of RPC Endpoint to

Ethereum:https://eth.blockrazor.xyz/stream?state=true

BSC:https://bsc.blockrazor.xyz/stream?state=true

Data Stream Example(default)

{
    "chainID":"56" //ETH: 1, BSC:56
    "hash":"0x2ba4c05436d4a48a0ce30341a3164b34b31c091a28ed62618f7b0512aba41f51" // bundle hash
    "txs":[{
          "hash":"0x2ba4c05436d4a48a0ce30341a3164b34b31c091a28ed62618f7b0512aba41f51"
          "from":"0xB4647b856CB9C3856d559C885Bed8B43e0846a47"
          "to":"0x0000000000000000000000000000000000001000"
          "value":"0x1c4eda9192000"
          "nonce":88036
          "calldata":"0xf340fa01000000000000000000000000b4647b856cb9c3856d559c885bed8b43e0846a47"
          "gasLimit":35000
          "gasPrice":1
          "functionSelector":"0xe47d166c"
          "logs":[
              {
                "address": "0x6c1bcf1b99d9f0819459dad661795802d232437e",
                "topics": ["0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67", "0x0000000000000000000000000000000000000000000000000000000000000000", "0x0000000000000000000000000000000000000000000000000000000000000000"],
                "data": "0x"
              }
              {
                "address": "0x6c1bcf1b99d9f0819459dad661795802d232437e",
                "topics": ["0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67", "0x0000000000000000000000000000000000000000000000000000000000000000", "0x0000000000000000000000000000000000000000000000000000000000000000"],
                "data": "0x"
              }
          ]
    }]
    "nextBlockNumber":39177941  //the block number where the bundle is going to be included
    "maxBlockNumber":39177941  //the maximum block number valid for this bundle
    "proxyBidContract":"0xE7cFc930d385783B3AD156A533EF097202014982" //bidding contract address, call the contract's proxyBid method to bid
    "refundAddress":"0x6c1bcf1b99d9f0819459dad661795802d232437e", //the bidding amount will be refunded to refundAddress in proportion
    "refundCfg":10380050 //refund configuration
}

Data Stream Example(including state)

The default data stream does not contain state field, if you need to obtain it, please modify the url of RPC Endpoint to

Ethereum:https://eth.blockrazor.xyz/stream?state=true

BSC:https://bsc.blockrazor.xyz/stream?state=true

{
    "chainID":"56" //ETH: 1, BSC:56
    "hash":"0x2ba4c05436d4a48a0ce30341a3164b34b31c091a28ed62618f7b0512aba41f51" // bundle hash
    "txs":[{
          "hash":"0x2ba4c05436d4a48a0ce30341a3164b34b31c091a28ed62618f7b0512aba41f51"
          "from":"0xB4647b856CB9C3856d559C885Bed8B43e0846a47"
          "to":"0x0000000000000000000000000000000000001000"
          "value":"0x1c4eda9192000"
          "nonce":88036
          "calldata":"0xf340fa01000000000000000000000000b4647b856cb9c3856d559c885bed8b43e0846a47"
          "gasLimit":35000
          "gasPrice":1
          "functionSelector":"0xe47d166c"
          "logs":[
              {
                "address": "0x6c1bcf1b99d9f0819459dad661795802d232437e",
                "topics": ["0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67", "0x0000000000000000000000000000000000000000000000000000000000000000", "0x0000000000000000000000000000000000000000000000000000000000000000"],
                "data": "0x"
              }
              {
                "address": "0x6c1bcf1b99d9f0819459dad661795802d232437e",
                "topics": ["0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67", "0x0000000000000000000000000000000000000000000000000000000000000000", "0x0000000000000000000000000000000000000000000000000000000000000000"],
                "data": "0x"
              }
          ]
    }]
    "nextBlockNumber":39177841  //the block number where the bundle is going to be included
    "maxBlockNumber":39177941  //the maximum block number valid for this bundle
    "proxyBidContract":"0xE7cFc930d385783B3AD156A533EF097202014982" //bidding contract address, call the contract's proxyBid method to bid
    "refundAddress":"0x6c1bcf1b99d9f0819459dad661795802d232437e", //the bidding amount will be refunded to refundAddress in proportion
    "refundCfg":10380050 //refund configuration
    "state": { //state change of state objects
	"0x7C3b00CB3B40Cc77d88329A58574E29cFA3cb9E2": { //The address of the state object where the data changes, which can be EOA or smart contract
	      "0x935b605129a438014d6ae0692623c5e1fbf83d5a631f5a0f8489a301966cf608": "0x00000000000000000000000000000000000000000000010c86a7e418723ffc00"
	      //"the Key of the changed data in state object":"the Value of changed data in state object"
	      }
      }
}

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