Final 1559 major updates

[fselmo]

What was wrong?

• Missing default values for maxFeePerGas and maxPriorityFeePerGas in /web3/_utils/transactions.py
• Our unit / core tests do not test for the new EIP-1559 params maxFeePerGas and maxPriorityFeePerGas
• Our docs still use gasPrice values in the examples / code samples rather than the new maxFeePerGas and maxPriorityFeePerGas fields

How can it be fixed?

Once eth-tester has EIP-1559 support:

• Add agreed-upon default values for maxFeePerGas and maxPriorityFeePerGas in /web3/_utils/transactions.py
• Update the tests that rely on eth-tester and our docs to test for / use the new params maxFeePerGas and maxPriorityFeePerGas wherever gasPrice is currently being used. We should make sure to still include some tests with the gasPrice param, wherever appropriate, to ensure our support for legacy transactions.

Note: This is dependent on eth-tester support for EIP-1559 / london hard fork

[SamarthPardhi]

I am using Infura network and currently sending my transactions in web3.py like this:

tx = {
    'nonce': nonce,
    'to': toAddr,
    'value': int(value),
    'gas': gas, #21000
    'gasPrice': web3.toWei(gasPrice, 'gwei')
}
signed_tx = web3.eth.account.sign_transaction(tx, privKey) 
tx_hash = web3.eth.sendRawTransaction(signed_tx.rawTransaction)

In order to make EIP-1559 styled transaction I modified the tx as:

tx = {
    'nonce': nonce,
    'to': toAddr,
    'value': int(value),
    'gas': gas, #21000,
    'maxFeePerGas': web3.toWei(maxFee, 'gwei'),
    'maxPriorityFeePerGas': web3.toWei(PriorityFee, 'gwei')
}

But, now I'm getting error that gasPrice is not provided. I am using web3's version: 5.23.1

Can you please help me to how to make EIP-1559 transactions in web3.py correctly.

[fselmo]

@SamarthPardhi, this is the line that's important here:

signed_tx = web3.eth.account.sign_transaction(tx, privKey) 

You need to add {type: '0x2'} as a param to your transaction for signing at the moment. There is a PR out for eth-account to make this implicit decision for the user but at the moment you need to be explicit about the type of transaction you are sending. 1559 dynamic fee transactions have type = 2. I hope this helps.

Edit: The explicit type is no longer necessary. Updating here for a better history.

[fselmo]

Closed by #2205