Skip to main content

EthTx transaction decoder.

Project description

EthTx - Ethereum transactions decoder

Python Black OpenSource Apache


pip install ethtx


The package needs a few external resources, defined in EthTxConfig object:

  1. Geth node - required to have access to the raw Ethereum data; it must be a full archive node with the debug option ON
  2. MongoDB database - required to store smart contracts' ABI and semantics used in the decoding process; it can be a Mongo Atlas or local instance
  3. Etherscan API key - required to get the source code and ABI for smart contracts used in transaction

Getting started

from ethtx import EthTx, EthTxConfig
from ethtx.models.decoded_model import DecodedTransaction

ethtx_config = EthTxConfig(
    mongo_connection_string= ##MongoDB connection string,
    mongo_database= ##MongoDB database,
    etherscan_api_key= ##Etherscan API key,
        "mainnet": dict(hook=[_Geth_archive_node_URL_], poa=[_POA_chain_indicator_])
        "mainnet": "",

ethtx = EthTx.initialize(ethtx_config)
transaction: DecodedTransaction = ethtx.decoders.decode_transaction('0x50051e0a6f216ab9484c2080001c7e12d5138250acee1f4b7c725b8fb6bb922d')


EthTx most important functions:

  1. Raw node data access:
ethtx = EthTx.initialize(ethtx_config)
web3provider = ethtx.providers.web3provider

from ethtx.models.w3_model import W3Transaction, W3Block, W3Receipt, W3CallTree

# read raw transaction data directly from the node
w3transaction: W3Transaction = web3provider.get_transaction('0x50051e0a6f216ab9484c2080001c7e12d5138250acee1f4b7c725b8fb6bb922d')
w3block: W3Block = web3provider.get_block(w3transaction.blockNumber)
w3receipt: W3Receipt = web3provider.get_receipt(w3transaction.hash.hex())
w3calls: W3CallTree = web3provider.get_calls(w3transaction.hash.hex()
  1. ABI decoding:
from ethtx.models.objects_model import Transaction, Event, Call
from ethtx.models.decoded_model import DecodedEvent, DecodedCall, DecodedTransfer, DecodedBalance

# read the raw transaction from the node
transaction: Transaction = web3provider.get_full_transaction('0x50051e0a6f216ab9484c2080001c7e12d5138250acee1f4b7c725b8fb6bb922d')

# decode transaction components
abi_decoded_events: List[Event] = ethtx.decoders.abi_decoder.decode_events(, transaction.metadata)
abi_decoded_calls: DecodedCall = ethtx.decoders.abi_decoder.decode_calls(transaction.root_call, transaction.metadata)
abi_decoded_transfers: List[DecodedTransfer] = ethtx.decoders.abi_decoder.decode_transfers(abi_decoded_calls, abi_decoded_events)
abi_decoded_balances: List[DecodedBalance] = ethtx.decoders.abi_decoder.decode_balances(abi_decoded_transfers)

# decode a single event
raw_event: Event =[3]
abi_decoded_event: DecodedEvent = ethtx.decoders.abi_decoder.decode_event(raw_event, transaction.metadata)

# decode a single call
raw_call: Call = transaction.root_call.subcalls[3].subcalls[2]
abi_decoded_call: DecodedCall = ethtx.decoders.abi_decoder.decode_call(raw_call, transaction.metadata)
  1. Semantic decoding:
from ethtx.models.decoded_model import DecodedTransactionMetadata

# get proxies used in the transaction
proxies = ethtx.decoders.get_proxies(transaction.root_call)

# semantically decode transaction components
decoded_metadata: DecodedTransactionMetadata = ethtx.decoders.semantic_decoder.decode_metadata(block.metadata, transaction.metadata, chain_id)
decoded_events: List[DecodedEvent] = ethtx.decoders.semantic_decoder.decode_events(abi_decoded_events, decoded_metadata, proxies)
decoded_calls: Call = ethtx.decoders.semantic_decoder.decode_calls(abi_decoded_calls, decoded_metadata, proxies)
decoded_transfers: List[DecodedTransfer] = ethtx.decoders.semantic_decoder.decode_transfers(abi_decoded_transfers)
decoded_balances: List[DecodedBalance] = ethtx.decoders.semantic_decoder.decode_balances(abi_decoded_balances)

# semantically decode a single event
decoded_event: DecodedEvent = ethtx.decoders.semantic_decoder.decode_event(abi_decoded_events[0], decoded_metadata, proxies)
# semantically decode a single call
decoded_call: Call = ethtx.decoders.semantic_decoder.decode_call(abi_decoded_calls.subcalls[2].subcalls[0], decoded_metadata, proxies)

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for EthTx, version 0.2.5
Filename, size File type Python version Upload date Hashes
Filename, size EthTx-0.2.5-py3-none-any.whl (74.0 kB) File type Wheel Python version py3 Upload date Hashes View
Filename, size EthTx-0.2.5.tar.gz (46.4 kB) File type Source Python version None Upload date Hashes View

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring DigiCert DigiCert EV certificate Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page