Bundler
Nexus smart accounts are compatible with the Entrypoint v7. To maximize efficiency, Entrypoint v0.7.0 has introduced optimized data structures that significantly reduce transaction costs and enhance contract performance.
How to get Bundler URL
To start, send your transaction using this URL on the test networks:
https://bundler.biconomy.io/api/v3/84532/nJPK7B3ru.dd7f7861-190d-41bd-af80-6877f74b8f44For the mainnet bundler URL, reach out to us via email at bd@biconomy.io or telegram.
Supported Endpoints
eth_sendUserOperation
This method submits the user operation for on-chain execution and returns the userOpHash if it succeeds (or gets queued). In case of failure, an error will be returned.
Parameters| Param | Type | Description | Required |
|---|---|---|---|
| method | string | Name of method in this case: eth_sendUserOperation | Required |
| params | array | An array consisting of the UnPackedUseroperation object, entrypoint address | Required |
| id | string | id for request determined by client for JSON RPC requests | Required |
| jsonrpc | string | JSON RPC version in this case 2.0.0 | Required |
{
"jsonrpc": "2.0",
"method": "eth_estimateUserOperationGas",
"params": [
{
"sender":"0x43a069aeA6122cd46aE8d451Bb599068ac5616a9", // required
"factory": "0x00000001cdE7c53f30b20Bd36015C48652F3faaC",
"factoryData": "0x123433",
"nonce": "0x663e709f60477f07885230e213b8149a7027239b0000000000000035", // required
"callData": "0x1235", // required
"callGasLimit": "0x1e8480", // required
"verificationGasLimit": "0x1e8480", // required
"preVerificationGas": "0x2aea540", // required
"maxFeePerGas": "0x1e86e6", // required
"maxPriorityFeePerGas": "0x1e8480", // required
"signature": "0xd1a0bba40a34be11544af179b04e234298b84dabc0f4e410a5571a46b6eb1fa44073049ecf1035c896f64fc979427a0369304ccc3c765c8d304b64a6f1bb3d921c", // required
"paymaster": "0x",
"paymasterVerificationGasLimit": "0x0",
"paymasterPostOpGasLimit": "0x0",
"paymasterData": null
},
"0x0000000071727de22e5e9d8baf0edac6f37da032", // required
{} // stateOverrideSet (optional)
],
"id": 1
}{
"jsonrpc": "2.0",
"id": 1,
"result": "0x6ce281a7e0e560ccfd19162a0c8fc223c82f3ff964b1a8c5073f09c093510a6c"
}eth_estimateUserOperationGas
Parameters| Param | Type | Description | Required |
|---|---|---|---|
| method | string | Name of method in this case: eth_estimateUserOperationGas | Required |
| params | array | An array consisting of the UnPackedUseroperation object, entrypoint address | Required |
| id | string | id for request determined by client for JSON RPC requests | Required |
| jsonrpc | string | JSON RPC version in this case 2.0.0 | Required |
{
"jsonrpc": "2.0",
"method": "eth_estimateUserOperationGas",
"params": [
{
"sender":"0x43a069aeA6122cd46aE8d451Bb599068ac5616a9", // required
"factory": "0x00000001cdE7c53f30b20Bd36015C48652F3faaC",
"factoryData": "0x123433",
"nonce": "0x663e709f60477f07885230e213b8149a7027239b0000000000000035", // required
"callData": "0x1235", // required
"callGasLimit": "0x1e8480",
"verificationGasLimit": "0x1e8480",
"preVerificationGas": "0x2aea540",
"maxFeePerGas": "0x1e86e6",
"maxPriorityFeePerGas": "0x1e8480",
"signature": "0xd1a0bba40a34be11544af179b04e234298b84dabc0f4e410a5571a46b6eb1fa44073049ecf1035c896f64fc979427a0369304ccc3c765c8d304b64a6f1bb3d921c",
"paymaster": "0x",
"paymasterVerificationGasLimit": "0x0",
"paymasterPostOpGasLimit": "0x0",
"paymasterData": null
},
"0x0000000071727de22e5e9d8baf0edac6f37da032", // required
{} // stateOverrideSet (optional)
],
"id": 1
}{
"jsonrpc": "2.0",
"id": 1,
"result": {
"preVerificationGas": "0x2aea540",
"verificationGasLimit": "0x2aea540",
"callGasLimit": "0x2aea540",
"paymasterVerificationGasLimit": "0x0",
"paymasterPostOpGasLimit": "0x0",
}
}