Firstly, greatly appreciate the effort in making flashbots available to the Python community. Ty!

Running the simply.py example as is as I see it, has 3 issues for me. One is logical - as mentioned elsewhere - in which rarely does one have the receiver's private key to sign. The second may be code related and the compiler throws an error in the bundle declaration (line 72) with some dictionary merge issue. Is this common? Lastly, the library doesn't seem to be updated to work with EIP1559 - requiring gasFee as opposed to their new counterparts, which is not a work-stopper, but it's sub-optimal.

Is it expected for this library to be maintained further?

(If I had the knowledge to contribute and further this library, I would)

Thanks again

I have an error when using the send_private_transaction method send_bundel is ok can someone tell me what is the problem。

code: bundle = {"signed_transaction": tx1_signed.rawTransaction} w3.flashbots.send_private_transaction(bundle)

In this PR:

• Modify Flashbots.sign_bundle to work with type 1 and 2 transactions (as described in EIP-2178)
• Implement parsing of signed transactions to correctly handle nonces and more-or-less match the js library behavior
• Add minimal working example of post-London flashbots usage
• Bump web3py dependency to 5.22 and project version to 1.0.1
• Some, generally unnecessary, code style refinements

I used the example as is but made some modification, including

1. Changing chainID to 5 for Goerli test network
2. Adding "w3.middleware_onion.inject(geth_poa_middleware, layer=0)" to resolve the POA chain error

However I still received the following error: sim error {'code': -32000, 'message': 'missing trie node 4216c08cb01c7e93ab89e22710bff15671947a723d5bd3986bbf7d26262096c7 (path )'}

Also I keep getting "Bundle was not executed" message even when setting a higher gas price...anyone has the same issue?

Added support for transactions expressed as dictionaries, as provided by w3.eth.get_block('pending', full_transactions=True)

Example

AttributeDict({'blockHash': HexBytes('0xe26e77c7426bb4b370dede3e6de140e67c2411e90813c3017ff2761a0e9420b8'), 'blockNumber': 10713060, 'from': '0x81F87187235223c2eb194EA63B2B292332EF8f82', 'gas': 134238, 'gasPrice': 10000000000, 'hash': HexBytes('0xbbd78a51741b3c972e646ac09b36441ed0dd3a023bbfb62d0d6de9da6f6319a9'), 'input': '0x7ff36ab500000000000000000000000000000000000000000000000000000000001b4139000000000000000000000000000000000000000000000000000000000000008000000000000000000000000081f87187235223c2eb194ea63b2b292332ef8f820000000000000000000000000000000000000000000000000000000061979f0d0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000c778417e063141139fce010982780140aa0cd5ab000000000000000000000000dbc941fec34e8965ebc4a25452ae7519d6bdfc4e', 'nonce': 177917, 'r': HexBytes('0xa76ae800d6eaa9ba72589f0f94ac8cfeef182bb677f2f38768ba44bbf1bd45ca'), 's': HexBytes('0x535e932ef0d42fde8b40b2bee0672b07af03327b569d05a64fbef622cd74d811'), 'to': '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D', 'transactionIndex': 0, 'type': '0x0', 'v': 42, 'value': 729641236761779})

In April, web3 first removed Module in favor of ModuleV2 and then renamed ModuleV2 to Module. The changes have been live since web3 5.19.0.

This PR bumps the web3 dependency to use at least 5.19.0. It allows us to use the flashbots package with latest eth-brownie version, which depend on web3 5.21.0.

Note I haven't thoroughly tested this yet. Please let me know if I missed something.

I think this could be helpful. This way you can build an unsigned bundle, call simulate, check results, then send_bundle_munger(signed_bundled_transactions, ...).

Without this, you can pass the unsigned bundle to send_bundle_munger, but it has to sign things twice then.

Hi! I've started on a cleanup of the code base located over here: https://github.com/N0K0/web3-flashbots Its mainly based on good old PEP-8 and Black https://github.com/psf/black

Do the Flashbots organization have any opinions on codestyle++ :) Other than that my goal is adding the missing signature header and clean up the demo files.

Hello friends, I am trying to add support for type 2 transactions (https://github.com/flashbots/web3-flashbots/pull/31) but I am having a few issues.

typed_transaction = TypedTransaction.from_dict({
                'chainId': mempool_tx['chainId'],
                'nonce': mempool_tx["nonce"],
                'maxPriorityFeePerGas': mempool_tx["maxPriorityFeePerGas"],
                'maxFeePerGas': mempool_tx["maxFeePerGas"],
                'gas': mempool_tx["gas"],
                'value': mempool_tx["value"],
                'data': HexBytes(mempool_tx["input"]),
                'accessList': mempool_tx['accessList'],
                'to': HexBytes(mempool_tx['to']),
                'type': mempool_tx['type'],
                'v': v,
                'r': r,
                's': s
})

print(typed_transaction.as_dict())

raw = encode_transaction(typed_transaction, (v, r, s))

w3.eth.send_raw_transaction(raw)

{'chainId': 1, 'to': HexBytes('0xe592427a0aece92de3edee1f18e0157c05861564'), 'value': 0, 'data': HexBytes('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'), 'accessList': [], 'nonce': 717, 'maxPriorityFeePerGas': 1533500047, 'maxFeePerGas': 132166886538, 'gas': 342634, 'v': 0, 'r': 67327043002212475186977304167754595225730875999171967519505434404847271226951, 's': 36595555180238550166126321802692921865110803882641978438054671199525379451154, 'type': 2}

ValueError: {'message': 'invalid remainder', 'code': -32000, 'data': {'stack': 'Error: invalid remainder\n at Object.t.decode (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:4:9150)\n at S.queueRawTransaction (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:210203)\n at p.eth_sendRawTransaction (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:200119)\n at p.handleRequest (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:196970)\n at t (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:65024)\n at a.handleRequest (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:195252)\n at t (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:65024)\n at f.s.handleRequest (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:178304)\n at f.handleRequest (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:176115)\n at t (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:65024)\n at o.handleRequest (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:184369)\n at t (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:65024)\n at a.handleRequest (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:183814)\n at t (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:65024)\n at u._handleAsync (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:65060)\n at Timeout._onTimeout (/usr/local/lib/node_modules/ganache-cli/build/ganache-core.node.cli.js:55:64488)', 'name': 'Error'}}

What is wrong?

Flashbots Relay is complaining if field 'gasPrice' is set. Removing line 91 in flashbots.py resolves this issue.

https://github.com/flashbots/web3-flashbots/blob/46c1cb08b250b964b51974384109e07cdf42eb98/flashbots/flashbots.py#L91

As per https://discord.com/channels/755466764501909692/795777653197635596/844259896999804949 we would like to fix types.py code to work with Python 3.8.x.

This was the necessary change in the beginning of the file:

from eth_account.account import Account
from web3.types import TxParams
from typing import TypedDict
import typing

FlashbotsBundleTx = TypedDict(
    "FlashbotsBundleTx",
    {
        "transaction": TxParams,
        "signer": Account,
    },
)

FlashbotsBundleRawTx = TypedDict(
    "FlashbotsBundleRawTx",
    {
        "signed_transaction": str,
    },
)

FlashbotsOpts = TypedDict(
    "FlashbotsOpts",
    {"minTimestamp": int, "maxTimestamp": int, "revertingTxHashes": typing.List[str]},
)```

Also would be nice to have `poetry install` mentioned in the Readme for semi-noobs like me who never got in touch with it before.

Why?

I tried to simulate my bundle against historical blocks to backtest, and I keep receiving 400 Bad Request - decode txs issue. Example like:

flashbot.simulate(
        [
            web3.eth.get_transaction(historical_tx.hash),
            ...
        ],
        # hisotrical transaction's block information
        historical_tx.block - 1 ,
        historical_tx.block - 1,
        historical_tx.block_timestamp
)

What?

When I submit the callBundle request to some public builders I have a more detailed error message: cannot unmarshal hex string without 0x prefix into Go struct field CallBundleArgs.txs

It should be call_bundle_munger using some expired hexing handling.

How?

Updated to self.to_hex() to handle the transactions bundle bytes hexing.

when i want to cancel a transaction i made, using method

self.w3.flashbots.cancel_private_transaction(tx_hash)

i got response from relay:

502 Server Error: Bad Gateway for url: https://relay.flashbots.net/

Added an extra delay to the code that checks for bundle inclusion. I have encountered bugs where the TransactionNotFound error is raised even when my bundles land on chain.

This suggests that web3 providers sometimes update the value returned by 'w3.eth.block.number' before the 'w3.eth.get_transaction()' endpoint is aware of all transaction hashes from a recent block.

This may cause an issue where end-users send the same bundle twice because they do not receive proper confirmation.

I am a novice, does the flash robot support polygon? I replace the provider and variable and then run the sample.py file, but get a exception on w3.flashbots.send_bundle(bundle, target_block_number=block + 1) function, the error details is Bundle not found in block，I don't know if it's my problem。

I took a look at the example, and I'm finding it difficult to translate it to a contract deployment

https://web3py.readthedocs.io/en/stable/contracts.html#contract-deployment-example

As we can see here, it is possible to deploy a contract from web3py. Any ideas anyone?

I use web3 5.23.1, Python 3.9.6 and GCC 9.3.0 on linux.

When trying to import the flashbots module:

from flashbots import flashbot

This is the output:

Traceback (most recent call last): File "", line 1, in File "/usr/local/lib/python3.9/dist-packages/flashbots/init.py", line 9, in from .flashbots import Flashbots File "/usr/local/lib/python3.9/dist-packages/flashbots/flashbots.py", line 5, in from web3.module import ModuleV2 ImportError: cannot import name 'ModuleV2' from 'web3.module' (/usr/local/lib/python3.9/dist-packages/web3/module.py)

Maybe flashbots isn't compatible with the latest version of web3? Or what am I missing?