battlechain-lib-py 1.1.0

Python library for deploying on BattleChain and adopting Safe Harbor agreements. Mirrors cyfrin/battlechain-lib (Solidity).

battlechain-lib-py

Python library for deploying on BattleChain and adopting Safe Harbor agreements. Mirrors cyfrin/battlechain-lib (Solidity).

Boa-first, designed for Moccasin scripts.

• battlechain-lib-py
  • Installation
  • Quick start
  • What's included
  • Supported networks
    • Mainnet (626) addresses
  • Reference
    • is_attackable(contract_address: str) -> bool
    • bc_deploy_create(init_code: bytes) -> str
    • bc_deploy(deployer, *args) and build_init_code(deployer, *args)
    • default_agreement_details(...) and friends
    • Network overrides
  • Contributing
  • License

Installation

uv add battlechain-lib-py
# or
pip install battlechain-lib-py

Requires Python ≥ 3.11.

Quick start

A minimal Moccasin script that deploys a contract, creates a Safe Harbor agreement, adopts it, and requests attack mode:

import boa
from eth_utils import keccak

import battlechain as bc
from src import MyVault  # your Vyper contract


def moccasin_main() -> None:
    # 1. Deploy through BattleChainDeployer (auto-registers with AttackRegistry)
    vault = MyVault.deploy()
    bc.track_deployment(vault.address)

    # 2. Build agreement defaults — chain ID, CAIP-2 scope, and Safe Harbor URI
    #    are all picked automatically based on the active boa env.
    details = bc.default_agreement_details(
        protocol_name="MyProtocol",
        contacts=[bc.Contact(name="Security Team", contact="[e-mail]")],
        contracts=bc.deployed_contracts(),
        recovery_address=boa.env.eoa,
        chain_id=bc.TESTNET_CHAIN_ID,
    )

    # 3. Create + 14-day commitment + adopt, all in one call
    agreement = bc.create_and_adopt_agreement(
        details, owner=boa.env.eoa, salt=keccak(b"v1")
    )

    # 4. Enter attack mode — only valid on BattleChain
    bc.request_attack_mode(agreement)

    # 5. Verify source on the block explorer
    bc.verify_contract(vault.address, "src/MyVault.vy:MyVault", "0.4.0")

Run with mox run script/deploy.py --network battlechain.

What's included

Module	Mirrors	What it does
battlechain.config	src/BCConfig.sol	Chain IDs, CAIP-2 ids, addresses, Safe Harbor URIs, override registration
battlechain.types	src/types/AgreementTypes.sol	AgreementDetails, BountyTerms, BcAccount, BcChain, AgreementState
battlechain.abi	forge artifacts (out/)	Auto-generated ABI fragments
battlechain.builders	BCSafeHarbor builders	default_bounty_terms, default_agreement_details, …
battlechain.deploy	src/BCDeploy.sol	bc_deploy_create / _create2 / _create3 + tracked deployments
battlechain.safe_harbor	src/BCSafeHarbor.sol	create_and_adopt_agreement, request_attack_mode, …
battlechain.query	src/BCQuery.sol	is_attackable (off-chain explorer API) + on-chain primitives
battlechain.verify	starter verify_contract.py	Source verification via the explorer's Etherscan-compatible API
battlechain.errors	Solidity custom errors	Typed exceptions: NotBattleChainError, ApiFailedError, …
battlechain.createx_chains	src/CreateXChains.sol	Registry of CreateX-supported chains

Supported networks

Network	Chain ID	RPC	Status
Mainnet	626	https://mainnet.battlechain.com	Available
Testnet	627	https://testnet.battlechain.com	Available

Both networks have a block explorer, so the explorer-backed helpers (is_attackable, verify_contract) work on mainnet and testnet:

• Mainnet: https://explorer.mainnet.battlechain.com/
• Testnet: https://explorer.testnet.battlechain.com/

Mainnet (626) addresses

Contract	Address
Safe Harbor Registry (proxy)	0xd229f4EE1bAE432010b72a9d1bD682570F4C6eBe
Registry Implementation	0xBFF0ec94740c287932B50E64c2e8b380129B99a1
Agreement Factory (proxy)	0xCdB7F5C0F708baBaabE82afE1DbA8362023AcFdd
AgreementFactory Implementation	0x8d4fEDF4462E3876Ae7C70CC0C5cebA482003Ad5
Attack Registry (proxy)	0x24876e481eC7198CAC95af739Df2a852CE65A415
AttackRegistry Implementation	0x03A3228A4ce38362289E715bbc26Cac8b98e421B
BattleChainDeployer	0xD12765D21dDba418B8Fc0583c4716763e03Aa078
CreateX	0xa397f06F07251A3AEd53f6d3019A2a6cbd83E53e
Registry Moderator	0x445d5685c4Ae71550Da0716b82B434AEA140E0c7

Note: on BattleChain mainnet, CreateX is not at the well-known 0xba5Ed0… address — create_x_address(626) resolves the BattleChain deployment above.

For local Anvil or unsupported chains, register addresses with config.set_overrides:

import battlechain.config as cfg

cfg.set_overrides(
    chain_id=31337,
    registry="0x…",
    factory="0x…",
    attack_registry="0x…",
    deployer="0x…",
)

Reference

is_attackable(contract_address: str) -> bool

Mirrors BCQuery.isAttackable. Returns True if any Safe Harbor agreement covering the contract is in UNDER_ATTACK or PROMOTION_REQUESTED. Resolves coverage via the BattleChain block explorer (works for top-level and child contracts).

import battlechain as bc

if bc.is_attackable("0x…"):
    print("fair game under Safe Harbor")

For top-level-only on-chain checks (no HTTP), use is_top_level_contract_under_attack.

bc_deploy_create(init_code: bytes) -> str

Routes through BattleChainDeployer on BattleChain (auto-registers with the AttackRegistry) and through CreateX on any of the 190+ supported chains. bc_deploy_create2(salt, init_code) and bc_deploy_create3(salt, init_code) work the same way.

Every deploy is tracked — call deployed_contracts() to get them all and pass straight into default_agreement_details.

bc_deploy(deployer, *args) and build_init_code(deployer, *args)

Higher-level wrappers for boa-compiled contracts. build_init_code takes a boa VyperDeployer (e.g. the symbol from from src import MyContract) plus constructor args and returns the assembled init code — handy when paired with bc_deploy_create2 for deterministic addresses:

salt = keccak(b"my-vault-v1")
init_code = bc.build_init_code(MyVault, token.address)
address = bc.bc_deploy_create2(salt, init_code)

bc_deploy does the full job in one call: builds init code, deploys via BattleChainDeployer (CREATE), wraps the result back into a VyperContract, and persists the address to a per-chain JSON file (.bc_deployments.json by default):

vault = bc.bc_deploy(MyVault, token.address)
vault.deposit(amount)  # use it like any boa contract

Subsequent script runs can resolve the address with get_tracked_address("MyVault") or fetch a wrapped contract instance with get_tracked_contract(MyVault). The JSON file exists because deployer-routed contracts perform their CREATE inside BattleChainDeployer's call context, so moccasin's deployments.db can't see them.

default_agreement_details(...) and friends

Build AgreementDetails with sensible defaults. On BattleChain it sets the BattleChain CAIP-2 scope and BATTLECHAIN_SAFE_HARBOR_URI; on other chains it falls back to the chain's eip155: scope and the generic Safe Harbor V3 URI.

The default bounty terms match BCSafeHarbor.defaultBountyTerms: 10%, $1M cap, retainable, anonymous, no aggregate cap.

Network overrides

Same pattern as BCBase._setBcAddresses: register override addresses for any chain and they take precedence over the canonical registry.

Contributing

See CONTRIBUTING.md for dev environment setup, the codegen flow, and the test suite.

License

Dual-licensed under MIT and Apache-2.0 at your option.