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echonet: add constants file #10430

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Merged
merged 1 commit into from
Nov 27, 2025
Merged

echonet: add constants file #10430

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11 changes: 3 additions & 8 deletions echonet/l1_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,19 +6,14 @@
import inspect
import logging
import requests
from l1_constants import LOG_MESSAGE_TO_L2_EVENT_SIGNATURE, STARKNET_L1_CONTRACT_ADDRESS


class L1Client:
L1_MAINNET_URL = "https://eth-mainnet.g.alchemy.com/v2/{api_key}"
DATA_BLOCKS_BY_TIMESTAMP_URL_FMT = (
"https://api.g.alchemy.com/data/v1/{api_key}/utility/blocks/by-timestamp"
)
# Taken from apollo_l1_provider/src/lib.rs
LOG_MESSAGE_TO_L2_EVENT_SIGNATURE = (
"0xdb80dd488acf86d17c747445b0eabb5d57c541d3bd7b6b87af987858e5066b2b"
)
# Taken from ethereum_base_layer_contracts.rs
STARKNET_L1_CONTRACT_ADDRESS = "0xc662c410C0ECf747543f5bA90660f6ABeBD9C8c4"

@dataclass(frozen=True)
class Log:
Expand Down Expand Up @@ -96,8 +91,8 @@ def get_logs(self, from_block: int, to_block: int) -> List["L1Client.Log"]:
{
"fromBlock": hex(from_block),
"toBlock": hex(to_block),
"address": self.STARKNET_L1_CONTRACT_ADDRESS,
"topics": [self.LOG_MESSAGE_TO_L2_EVENT_SIGNATURE],
"address": STARKNET_L1_CONTRACT_ADDRESS,
"topics": [LOG_MESSAGE_TO_L2_EVENT_SIGNATURE],
}
],
"id": 1,
Expand Down
10 changes: 10 additions & 0 deletions echonet/l1_constants.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
# Starknet L1 Core Contract address on Ethereum mainnet
# Source: crates/papyrus_base_layer/src/ethereum_base_layer_contract.rs
STARKNET_L1_CONTRACT_ADDRESS = "0xc662c410C0ECf747543f5bA90660f6ABeBD9C8c4"

# Event signatures (auto-generated by Rust sol! macro from ABI)
# Source: crates/papyrus_base_layer/src/constants.rs
# ABI: crates/papyrus_base_layer/resources/Starknet-0.10.3.4.json
LOG_MESSAGE_TO_L2_EVENT_SIGNATURE = (
"0xdb80dd488acf86d17c747445b0eabb5d57c541d3bd7b6b87af987858e5066b2b"
)
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