Add a clear example for sending transactions.

[mana-ethereum]

Add a clear example for sending transactions.

[albertoramires]

@ayrat555 is there a way to do something similar to @somoza's example with the ethereumex library? Using a PK instead of accounts that is.

[ayrat555]

can you please print and share here

%{
      data: "0x" <> abi_encoded_data,
      to: contract_address,
      from: address,
      gas: "0xc350",
      gasPrice: nil
    }

[somoza]

Hey Ayrat!

I noticed that I have to sign it with the from address' private key. I used the ETH dep for that, here is my working code:

abi_encoded_data  = ABI.encode("setTest(uint,string)", [1, "Foo"]) |> Base.encode16(case: :lower)
contract_address  = Application.get_env(:ethereumex, :contract_address)
account1_private_key = "5b17b72f21c486a469fb9a5f601bf53060c933a010cfc9d1900c069f536cd220"
account1_address =  Application.get_env(:ethereumex, :owner)

{:ok, tx_hash} = ETH.send_transaction(%{
  to: contract_address,
  from: account1_address,
  gas: "0xc350",
  gasPrice: nil,
  data: "0x" <> abi_encoded_data,
}, account1_private_key) #Signed as is a status modifier.

I can't manage this in a single way using Ethereumix...

I hope this could help somebody, even if is not the most common use to manage send transactions from the backend. I realize that people prefer to pass this task to JS on frontend in order to allow clients to use their wallets through metamask.

PS: Don't worry about the private key, it's a local Ganache environment.

[ayrat555]

@somoza hello can you please update README 🙏

[somoza]

I could and would be a pleasure indeed, but I'm not using Ethereum library but a third party. Is it not a problem to update the README?

[ayrat555]

@somoza thank you anyway!