interevm 0.1.1

Async EVM/Web3 library — connection pooling, request batching, ABI encoding/decoding, Multicall3

interevm

Async EVM/Web3 library for Python — connection pooling, request batching, ABI encoding/decoding, and Multicall3 support.

Installation

pip install interevm

Requirements: Python 3.11+, no web3.py dependency.

---

Quick start

RPCClient

import asyncio
from interevm import RPCClient

async def main():
    async with RPCClient("https://eth.llamarpc.com") as client:
        block  = await client.get_block_number()
        bal    = await client.get_balance("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045")
        fees   = await client.get_eip1559_fees()
        print(block, bal, fees)

asyncio.run(main())

Pass a full RPCConfig to tune connection pool size, timeouts, retries, and TTL cache:

from interevm import RPCClient, RPCConfig

config = RPCConfig(
    rpc_url="https://eth.llamarpc.com",
    max_connections=50,
    max_retries=3,
    cache_ttl=60,
)
client = RPCClient(config)

---

Contract — encode / decode

from interevm import Contract

ERC20_ABI = [...]  # standard ERC-20 ABI list

token = Contract("0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", ERC20_ABI)

# Build calldata manually
calldata = token.encode_function_data("balanceOf", "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045")

# Decode a raw eth_call result
result = token.decode_function_result("balanceOf", "0x00000000000000000000000000000000000000000000000000000002540be400")
print(result)  # 10000000000

# Decode an event log
decoded = token.decode_log(receipt["logs"][0]["topics"], receipt["logs"][0]["data"])
print(decoded)  # {'from': '0x...', 'to': '0x...', 'value': 1000, '_event': 'Transfer'}

---

Multicall

import asyncio
from interevm import RPCClient, Contract, MulticallHelper

async def main():
    async with RPCClient("https://eth.llamarpc.com") as client:
        helper = MulticallHelper(client)

        usdc  = Contract("0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", ERC20_ABI)
        weth  = Contract("0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", ERC20_ABI)
        wallet = "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"

        results = await helper.execute_multicall([
            (usdc.address, usdc, "balanceOf", (wallet,), "usdc_balance"),
            (weth.address, weth, "balanceOf", (wallet,), "weth_balance"),
        ])

        print(results["usdc_balance"])
        print(results["weth_balance"])

asyncio.run(main())

---

Public API

interevm.RPCClient

Method	Description
get_chain_id()	Chain ID (cached per instance)
get_block_number()	Latest block number
get_balance(address, block)	Balance in wei
get_nonce(address, block)	Transaction count
get_bytecode(address, block)	Contract bytecode
get_gas_price()	Gas price in wei
call(to, data, ...)	Raw eth_call
estimate_gas(tx)	Gas estimate
send_raw_transaction(signed_tx)	Broadcast signed tx
get_block_by_number(n, full_txs)	Block data
batch_get_blocks(numbers)	Batch block fetch
get_transaction(hash)	Transaction by hash
get_transaction_receipt(hash)	Receipt by hash
batch_get_transactions(hashes)	Batch tx fetch
batch_get_receipts(hashes)	Batch receipt fetch
get_eip1559_fees()	base_fee / max_priority_fee / max_fee
get_params_for_eip1559_transaction(addr)	nonce + fees in one call
multicall(multicall_contract, calls)	Multicall3.tryAggregate
call_function(contract, name, *args)	Typed contract call
debug_trace_transaction(hash, ...)	debug_traceTransaction
close()	Release all connections

interevm.RPCConfig

Dataclass with connection, timeout, retry, and cache settings.

interevm.RPCError

Exception raised on JSON-RPC error responses. Carries .code, .message, .data.

interevm.CallRequest

Dataclass representing one call in a batch (method, params, id).

interevm.Contract

Method	Description
encode_function_data(name, *args)	Build hex calldata
decode_function_result(name, data)	Decode eth_call result
decode_log(topics, data)	Decode event log
get_function(name) → ABIFunction	ABI function descriptor
get_event(name) → ABIEvent	ABI event descriptor
get_event_by_topic(topic0)	Lookup event by topic0
has_function(name) / has_event(name)	Membership check
list_functions() / list_events()	List names

interevm.ABIFunction

Frozen dataclass: name, inputs, outputs, state_mutability, selector (computed). Methods: encode_input(*args), decode_output(data).

interevm.ABIEvent

Frozen dataclass: name, inputs, anonymous, topic0 (computed). Methods: decode_log(topics, data).

interevm.MulticallHelper

execute_multicall(calls, batch_size=100) — batch eth_calls via Multicall3.

Helper functions

Function	Description
mkdata(sig, types, params)	Build calldata from signature + params
compute_function_selector(sig)	4-byte selector (LRU cached)
compute_event_topic(sig)	32-byte topic0 hash (LRU cached)
topic_from_address(addr)	Address → 32-byte topic
topic_from_uint(value)	uint → 32-byte topic
ensure_hex_prefix(value)	Ensure 0x prefix
format_tx_dict(tx)	Convert int fields to hex for JSON-RPC
rpc_retry(coro, *args, retries, base_delay)	Standalone retry wrapper