Quick Start

Use the Alchemy provider plugin to interact with blockchains via APIs. The ape-alchemy plugin supports the following ecosystems:

• Ethereum
• Arbitrum
• Optimism
• Polygon

Dependencies

• python3 version 3.8 or greater, python3-dev

Installation

via pip

You can install the latest release via pip:

pip install ape-alchemy

via setuptools

You can clone the repository and use setuptools for the most up-to-date version:

git clone https://github.com/ApeWorX/ape-alchemy.git
cd ape-alchemy
python3 setup.py install

Quick Usage

First, make sure you have one of the following environment variables set (it doesn't matter which one):

• WEB3_ALCHEMY_PROJECT_ID
• WEB3_ALCHEMY_API_KEY
• WEB3___ALCHEMY_PROJECT_ID
• WEB3___ALCHEMY_PROJECT_ID

For example, to use both Arbitrum and Ethereum in the same session, you could set both WEB3_ARBITRUM_MAINNET_ALCHEMY_PRPJECT_ID and WEB3_ETHEREUM_MAINNET_ALCHEMY_PRPJECT_ID.

NOTE: If using non-Ethereum networks, take care to install the correct plugins, such as ape-arbitrum, ape-optimism, etc:

ape plugins install arbitrum

Then, either in your current terminal session or in your root RC file (e.g. .bashrc), add the following:

export WEB3_ALCHEMY_PROJECT_ID=MY_API_TOKEN=<value-of-secret-key>

To use the Alchemy provider plugin in most commands, set it via the --network option:

ape console --network ethereum:goerli:alchemy

To connect to Alchemy from a Python script, use the networks top-level manager:

from ape import networks

with networks.parse_network_choice("ethereum:mainnet:alchemy") as provider:
    ...

Transaction Traces

If you are using a paid tier of Alchemy, you have access to both Geth and Parity style traces. Parity traces are faster and thus are the ones uses in Ethereum receipts' show_trace() method:

from ape import networks

alchemy = networks.provider  # Assuming connected to Alchemy
txn_hash = "0x053cba5c12172654d894f66d5670bab6215517a94189a9ffc09bc40a589ec04d"
receipt = alchemy.get_transaction(txn_hash)
receipt.show_trace()  # Prints the Transaction trace

To access the raw CallTree, do:

from ape import networks

alchemy = networks.provider  # Assuming connected to Alchemy
txn_hash = "0x053cba5c12172654d894f66d5670bab6215517a94189a9ffc09bc40a589ec04d"
call_tree = alchemy.get_call_tree(txn_hash)

To learn more about transaction traces, view Ape's transaction guide.

NOTE: If you require the Geth style traces, you still have access to them via the get_transaction_trace() method and utilities from the evm-trace library:

from evm_trace import CallType, get_calltree_from_geth_trace

from ape import networks

alchemy = networks.provider  # Assuming connected to Alchemy
txn_hash = "0x053cba5c12172654d894f66d5670bab6215517a94189a9ffc09bc40a589ec04d"
receipt = alchemy.get_transaction(txn_hash)
root_node_kwargs = {
    "gas_cost": receipt.gas_used,
    "gas_limit": receipt.gas_limit,
    "address": receipt.receiver,
    "calldata": receipt.data,
    "value": receipt.value,
    "call_type": CallType.CALL,
    "failed": receipt.failed,
}
trace_frame_iter = alchemy.get_transaction_trace(txn_hash)
call_tree = get_calltree_from_geth_trace(trace_frame_iter)