Bundler Endpoint As per ERC-4337 , Bundler is a node (block builder) that can handle UserOperations, create a valid an EntryPoint.handleOps() transaction, and add it to the block while it is still valid. This can be achieved by a number of ways:
Bundler can act as a block builder itself
If the bundler is not a block builder, it MUST work with the block building infrastructure such as mev-boost or other kind of PBS (proposer-builder separation)
The bundler can also rely on an experimental eth_sendRawTransactionConditional RPC API if it is available.
Utilize the following API to send the bundle of user operations to the bundler.
/senduserops
Prepare the data, to send the bundle of user operations, to the bundler.
POST https://api.expand.network/aa/senduserops
Request Body
Sample Request
Copy {
"userOps" : [
{
"sender" : "0x03D3a52d79eeB5014dFe28258e8c0978Ecd8e65c" ,
"nonce" : "0" ,
"initCode" : "0x" ,
"callData": "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",
"callGasLimit" : "260611" ,
"gasLimit" : "362451" ,
"verificationGasLimit" : "362451" ,
"preVerificationGas" : "53576" ,
"maxFeePerGas" : "29964445250" ,
"maxPriorityFeePerGas" : "100000000" ,
"paymasterAndData" : "0x" ,
"signature": "0x06ba793e154877ba4beff535372f70be6d2ebb5503f374297658caa13a114b5b29b5a45cd4835176e637018823bba5990b6f043f93fe792a5bdb2a09958ecca61c"
}
] ,
"bundler" : "0x6Fb447Ae94F5180254D436A693907a1f57696900" ,
"gas" : "516124"
} Sample Response
Copy {
"status" : 200 ,
"msg" : "success" ,
"data" : {
"from" : "0x6Fb447Ae94F5180254D436A693907a1f57696900" ,
"to" : "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789" ,
"gas" : "516124" ,
"data": "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",
"value" : "0"
}
}