Create a generic estimateGas() function

[miquelcabot]

Create a generic estimateGas() function that can be used whenever we want to estimate gas in a function.

[alexcos20]

Not sure if it's doable.
We have multiple contracts, with multiple ABIs, with multiple functions with variable number of arguments :)

also, frontend needs to estimate some transactions before hand, so it needs to be able to access that estimateGasXXX functions.

[miquelcabot]

@alexcos20 I think that it's possible. I have created an example of how to do it in another PR:

ocean.js/src/utils/TokenUtils.ts

Line 18 in f34573b

export async function estimateGas(

[alexcos20]

and how market will call that?

export async function estimateGas(
  tokenContract: Contract,
  from: string,
  functionSignature: string,

so market needs to know the contract, which is kind of ocean.js internal so far.

[miquelcabot]

@alexcos20 Ok, you're right. I thought that these "estimate gas" functions must be called only from inside the ocean.js functions. In that case, I can do some research about if there exists a simple solution to achieve it. Perhaps, using constants that stores the interface of the functions or simpler solutions, taking advantage of the exported ABIs from @oceanprotocols/contracts

[miquelcabot]

@alexcos20 I think that I have found a very simple solution to having a generic estimateGas() function without the need of the interface of the functions. You can review it here:

ocean.js/src/utils/TokenUtils.ts

Line 16 in 605812e

export async function estimateGas(

With this, we only need three parameters:

• The function of the smart contract that we need to estimate the gas
• The caller of the function
• The parameters of the funcion