eth_fund.py

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# Copyright (c) 2015-2022 Clearmatics Technologies Ltd
#
# SPDX-License-Identifier: LGPL-3.0+
 
from zeth.cli.constants import ETH_ADDRESS_DEFAULT
from zeth.cli.utils import \
    get_eth_network, load_eth_address, EtherValue, open_web3_from_network
from click import command, option, pass_context, Context
from typing import Optional
 
 
FUND_AMOUNT_DEFAULT = 1000000
 
 
@command()
@option(
    "--eth-addr",
    help=f"Address or address filename (default: {ETH_ADDRESS_DEFAULT})")
@option("--source-addr", help="Address or address filename (optional)")
@option(
    "--amount",
    type=int,
    default=FUND_AMOUNT_DEFAULT,
    help=f"Amount to fund (default: {FUND_AMOUNT_DEFAULT})")
@pass_context
def eth_fund(
        ctx: Context,
        eth_addr: Optional[str],
        source_addr: Optional[str],
        amount: int) -> None:
    """
    Fund an address. If no source address is given, the first hosted account on
    the RPC host is used. This command should only be used in test environments
    such as ganache or autonity-helloworld.
    """
    eth_addr = load_eth_address(eth_addr)
    eth_network = get_eth_network(ctx.obj["eth_network"])
    web3 = open_web3_from_network(eth_network)
 
    if not source_addr:
        # Use the first hosted address.
        source_addr = web3.eth.accounts[0]  # pylint: disable=no-member
 
        if eth_network.name == "autonity-helloworld":
            # The Autonity helloworld network supplies hosted accounts, secured
            # with the password 'test'. Attempt to unlock it.
            # pylint: disable=import-outside-toplevel, no-member
            from web3.middleware import geth_poa_middleware  # type: ignore
            web3.middleware_onion.inject(geth_poa_middleware, layer=0)
            web3.personal.unlockAccount(source_addr, "test")
 
    source_addr = load_eth_address(source_addr)
    print(f"eth_addr = {eth_addr}")
    print(f"source_addr = {source_addr}")
    print(f"amount = {amount}")
 
    web3.eth.sendTransaction({  # pylint: disable=no-member
        "from": source_addr,
        "to": eth_addr,
        "value": EtherValue(amount).wei
    })