Create and return a transaction sending amount from <from_> to <to>.

    The transaction will be signed with the given private key.

def new_transaction(
        vm: VM,
        from_: Address,
        to: Address,
        amount: int=0,
        private_key: PrivateKey=None,
        gas_price: int=10,
        gas: int=100000,
        data: bytes=b'') -> BaseTransaction:
    """
    Create and return a transaction sending amount from <from_> to <to>.

    The transaction will be signed with the given private key.
    """
    nonce = vm.state.get_nonce(from_)
    tx = vm.create_unsigned_transaction(
        nonce=nonce,
        gas_price=gas_price,
        gas=gas,
        to=to,
        value=amount,
        data=data,
    )

    return tx.as_signed_transaction(private_key)