# README

TB-SDK: THE BUNDLER SDK

This golang SDK is designed to aid in the integration with the ERC-4773 Account Abstractions Bundler component. The TB-SDK provides a comprehensive suite of functions to interact directly with a bundler instance, streamlining the process of preparing, executing, and managing user operations on the blockchain.

Supported Methods

`eth_` Namespace

Methods defined by the ERC-4337 spec.

Method	Supported
`eth_chainId`	✅
`eth_supportedEntryPoints`	✅
`eth_estimateUserOperationGas`	✅
`eth_sendUserOperation`	✅
`eth_getUserOperationByHash`	✅
`eth_getUserOperationReceipt`	✅

`debug_` Namespace

Method defined by the ERC-4337 spec. Used only for debugging/testing and should be disabled on production APIs.

Method	Supported
`debug_bundler_clearState`	🚧
`debug_bundler_dumpMempool`	🚧
`debug_bundler_sendBundleNow`	🚧
`debug_bundler_setBundlingMode`	🚧
`debug_bundler_setReputation`	🚧
`debug_bundler_dumpReputation`	🚧
`debug_bundler_addUserOps`	🚧

Sample Usage

- Bundler

package main

import (
    tbsdk "github.com/e4coder/tb-sdk"
)

func main() {
    bundler := tbsdk.NewBundler()
    err := bundler.Init("http://localhost:3000")
    if err != nil {
        panic(err)
    }

    userOp := tbsdk.NewOperationBuilder().
        Nonce(big.NewInt(123)).
        Sender(sender).
        CallData(data).
        FactoryAndData(&factoryAddress, factoryData).
        Signature(signature).
        Build()

    // RPC -> eth_estimateUserOperationGas
    rpcResponse, err := bundler.Eth_estimateUserOperationGas(userOp)
    if err != nil {
        panic(err)
    }

    fmt.Println(rpcResponse.Result)
}

- CounterfactualAddress

package main

import (
    tbsdk "github.com/e4coder/tb-sdk"
)

func main() {
	owner, _ := hex.DecodeString("494E8f1c10bb14Bea02C2f16cFB33a84BC57ef74")
	factory, _ := hex.DecodeString("4BBa2E1c4856228c0572f7b64f14916E2F091391")
	ar, _ := hex.DecodeString("F235B58DC3b2169136A857B06aaedcE1aEC4c667")
	ep, _ := hex.DecodeString("8024A70A99d35FF24Cacc861e946945530ee96A3")
	salt, _ := hex.DecodeString("0000000000000000000000000000000000000000000000000000000000000001")
	creationCode, _ := hex.DecodeString(TestAccountContractCreationCode) // look at create2_test.go

	initCode := tbsdk.AbiEncodePacked(creationCode, tbsdk.AbiEncode(
		owner,
		ar,
		ep,
		factory,
	))

	address := tbsdk.ComputeCounterfactualAddress(factory, salt, initCode)

	// https://mumbai.polygonscan.com/address/0xd40aeab1d9e7c57523c2f5381f79c9738a73fe2d#internaltx
	deployedAddress := "0xd40aeab1d9e7c57523c2f5381f79c9738a73fe2d"

	if address != deployedAddress {
        panic("error")
	}
}