Feature: Transaction Fee Interface Changes

[MitchTurner]

This is a prerequisite to working on DA block submission. We want to define the interface that the SDK teams can depend on for determining transaction fee.

Background

It costs a variable amount to post the blocks to the DA layer, we are trying to minimize that cost with DA block compression, but there are a lot of things that we can't control. Even if DA block cost was constant, the submitter may be the only submitter for that block or there may be many submitters who could share the cost. But, the cost isn't constant because ETH gas prices change.

Interface

We just want to take these things into account to give tx submitters as much visibility into and control of what there fee is going to be. And also flexibility for the implementer to find them an answer.

[MitchTurner]

https://www.notion.so/fuellabs/How-to-calculate-gas-price-off-chain-61898afc0f254d828f3291c1b710ca11

[MitchTurner]

I'm thinking the best approach is to hide the rules for determining the next block's maximum gas price, and just expose that number to any tx builders via a client endpoint.

[xgreenx]

Implemented with #1714 and fuel-core 0.23.0 release