Increase allowance in an ERC20 token

[gabrielfior]

Describe the bug
I want to call the method approve (described below) having the Safe as sender (tx['from']), effectively increasing the allowance given to the spender.

approve(address spender, uint256 amount) → bool

I might be confused about the Safe inner workings, but I don't think it's currently possible to have the Safe sign a transaction (please see steps to reproduce below).

To Reproduce
Steps to reproduce the behavior:

spender = "0x1234" # EOA account
    wxDAI = web3.eth.contract(address=contract_address, abi=contract_abi)
 tx_params = {}
    tx_params["nonce"] = tx_params.get(
        "nonce", web3.eth.get_transaction_count(from_address)
    )
    tx_params["from"] = SAFE_ADDRESS 
    approve_tx = wxDAI.functions.approve(
        Web3.to_checksum_address(spender), # spender here is another EOA, e.g. my own address
        int(1e18),
).build_transaction(tx_params)

    signed_approve = w3.eth.account.sign_transaction(
        approve_tx, private_key=SAFE_PRIVATE_KEY
    )
    approve_tx_hash = w3.eth.send_raw_transaction(signed_approve.rawTransaction)

Expected behavior
I expected the raw transaction to be submitted, but it's unclear how to complete transactions with a Safe's signature using web3py.

I appreciate your help in this topic.

[Uxio0]

A Safe does not use a Private key. You need to understand a little better how Safe works. You can take a look at https://github.com/safe-global/safe-cli/ to see how it handles ERC20 token sending, for example. We are adding more examples to our documentation, in the meantime you can check the CLI one: https://docs.safe.global/advanced/cli-reference/common-commands