eth/contract hello_world.sol : Unsupported method: eth_coinbase. Alchemy does not support mining eth...

[q9f]

eth/contract hello_world.sol : Unsupported method: eth_coinbase. Alchemy does not support mining eth...

[unixneo]

DEBUGGING UPDATE

Changed the endpoint to alchemy using the goerli testnet since ropsten is deprecating

hain = Eth::Client.create Endpoint::Provider.alchemy_goerli

This this I get an more interesting error:

Unsupported method: eth_coinbase. Alchemy does not support mining eth...

MacStudio:client tim$ rails c
Loading development environment (Rails 7.0.3)
irb(main):001:0> require "#{Rails.root}/lib/assets/eth.rb"
=> true
irb(main):002:0> EthGem::Core.contract("hello_world")
METAMASK_ETH_ADDRESS: 0xE179C056024150d56A4e94af9C5A36BCC0B4e502
HELLO DEF SEND                  
"{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":\"0x853a0d2313c0000\"}"
Balance is 6.0e+17              
FILE: /Users/tim/rails/eth/lib/assets/contracts/hello_world.sol
HELLO DEF SEND                  
"{\"jsonrpc\":\"2.0\",\"result\":\"0x5\",\"id\":2}"
HELLO DEF SEND
"{\"jsonrpc\":\"2.0\",\"error\":{\"code\":-32600,\"message\":\"Unsupported method: eth_coinbase. Alchemy does not support mining eth. See available methods at https://docs.alchemy.com/alchemy/documentation/apis\"},\"id\":3}"
/Users/tim/rails/eth/vendor/bundle/ruby/3.0.0/gems/eth-0.5.5/lib/eth/client.rb:453:in `send_command': Unsupported method: eth_coinbase. Alchemy does not support mining eth. See available methods at https://docs.alchemy.com/alchemy/documentation/apis (IOError)
irb(main):003:0> 

So, seems I need to disable or nil chain.eth_coinbase ?

Any ideas how best to do this?

[unixneo]

DEBUGGING. client.rb

  def default_account
      @default_account ||= Address.new eth_coinbase["result"]
    end

It appears this is part of the problem?

For test networks which do not mine, this call returns an error, correct?

What is the best way around this issue with test chains which do not mine?

Thanks

[q9f]

Thank you, this is actually a bug. I partially fixed it in #85 but have not seen this. 👍

[unixneo]

Testing all these various blockchain provider endpoints is useful it seems.

• Hope it helps!

See summary of first test results here:

https://community.unix.com/t/testing-eth-contract-deployment-using-the-eth-ruby-gem-against-provider-endpoints/387004

[q9f]

Do you want to submit a PR?

[unixneo]

Do you want to submit a PR?

I don't yet have the skills to debug the ETH protocol; but if I did, or if I ever do, I would be happy to help out anyway I can.

Not even sure where to start, to be honest. I've been focused on testing provider endpoints and not the underlying protocol; where would I start to debug / fix this issue?

My guess is it would be easier to just use the sender signing key?

    # Deploys a contract. Uses `eth_coinbase` or external signer
    # if no sender key is provided.

Is this documented on how to deploy a contract using a sender key? I'm happy to try that, if you think that is a good way forward @q9f

[q9f]

Oh, sure:

my_key = Eth::Key.new priv: "30137644b564785d01420f8043f043d74dcca64008e57c59f8ce713a0005a54b"
# ...
chain.deploy_and_wait(contract, sender_key: my_key)

[unixneo]

This issue is resolved. Thanks for your help @q9f