合约接口

有一套系统合约，有助于与zkSync Era网络的互动。 以下是这些合约。

• 许可证持有人（NonceHolder
• ERC20Contract & ERC20FunctionEncoder
• ContractDeployer

NonceHolder

NonceHolder "系统合约处理nonce的部署，它对于预先计算将被部署在网络中的合约地址很有用。

要构建它，你需要account'和Web3'对象与集成zksync模块。

from zksync2.manage_contracts.nonce_holder import NonceHolder
from eth_account import Account
from eth_account.signers.local import LocalAccount
from zksync2.module.module_builder import ZkSyncBuilder

zksync_web3 = ZkSyncBuilder.build("ZKSYNC_NETWORK_URL")
account: LocalAccount = Account.from_key("PRIVATE_KEY")
nonce_holder = NonceHolder(zksync_web3, account)

Methods:

Method	Parameters	Return value	Description
get_account_nonce	-	Nonce	Returns account nonce.
get_deployment_nonce	-	Nonce	Return the current deployment nonce that is going to be used.
increment_deployment_nonce	Address	Nothing	Manually increments deployment nonce by the provided account address.

ERC20Contract

这是系统合约，在内部作为EthereumProvider的实现方法的一部分使用
。

更感兴趣的类型包括ERC20FunctionEncoder。它用于在网络内发送非本地令牌的情况下提供方法编码。

建设只需要Web3对象和附加的zksync模块（ZkSyncBuilder）。

它只有一个方法：python encode_method，参数为函数名和它的args

ContractDeployer

ContractDeployer是一个实用的系统合同，以一个类型表示，涵盖以下功能。

• 通过`create'方法对二进制合同表示进行编码，以便进一步部署。
• 通过create2方法编码二进制合同表示，以便进一步部署。
• 为create和create2方法预先计算合同地址。

结构：只需要web3对象和附加的zksync模块。

Example:

from zksync2.manage_contracts.contract_deployer import ContractDeployer
from zksync2.module.module_builder import ZkSyncBuilder

zksync_web3 = ZkSyncBuilder.build("ZKSYNC_NETWORK_URL")
deployer = ContractDeployer(zksync_web3)

Parameter and Methods:

Method	Parameters	Return value	Description
encode_create	bytecode, optional call_data & salt	HexStr	Creates binary representation of a contract in an internal deploying format. bytecode - contract binary representation, call_data is used for ctor bytecode only, salt is used to generate unique identifier of deploying contract.
encode_create2	bytecode, optional call_data & salt	HexStr	Creates binary representation of contract in an internal deploying format. bytecode - contract binary representation, call_data is used for ctor bytecode only, salt is used to generate unique identifier of deploying contract.
compute_l2_create_address	Address, Nonce	Address	Accepts address of deployer and current deployed nonce and returns address of contract that is going to be deployed by theencode_create method.
compute_l2_create2_address	Address, bytecode, ctor bytecode, salt	Address	Accepts address of the deployer, binary representation of contract, it's constructor in binary format and salt. By default constructor can be b'0' value. It returns the address of the contract that is going to be deployed by anencode_create2 method.