Alberto Benegiamo

X-chain - introducing fees calculators

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## Why this should be merged This PR introduced `fees.Calculator` following closely what we have done in the `platformvm`. ## How this works - Introduce `fee.Calculator` interface and `staticCalculator` -...

X-chain - meter txs

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## Why this should be merged ## How this works ## How this was tested

## Why this should be merged ## How this works ## How this was tested

X-chain - update unit fees

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## Why this should be merged ## How this works ## How this was tested

## Why this should be merged Reuse tx builder in unit tests instead of laying out txs as we currently do. This simplifies maintenance and introduction of dynamic fees mechanism...

P-chain - Multidimensional Static Fees

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## Why this should be merged Splitting introduction of dynamic fees into 4 PRs: - [Introduce new dynamic fee calculator](https://github.com/ava-labs/avalanchego/pull/3188) - [Update wallet to build transactions with dynamic fees](https://github.com/ava-labs/avalanchego/pull/3189) -...

## Why this should be merged This PR introduced `fees.Calculator` which will calculate fees associated with a given transaction. `fees.Calculator` is pretty simple pre E upgrade, but will be upgraded...

X-chain - Dynamic Fees

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## PRs order: - [ ] https://github.com/ava-labs/avalanchego/pull/2700 - [ ] https://github.com/ava-labs/avalanchego/pull/3187 - [ ] https://github.com/ava-labs/avalanchego/pull/2705 - [ ] https://github.com/ava-labs/avalanchego/pull/2695 - [ ] https://github.com/ava-labs/avalanchego/pull/2872

P-chain - Priority fees

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## Why this should be merged ## How this works ## How this was tested

P-chain - Multidimensional Dynamic Fees

1

## Why this should be merged Splitting introduction of dynamic fees into 4 PRs: - [Introduce new dynamic fee calculator](https://github.com/ava-labs/avalanchego/pull/3188) - [Update wallet to build transactions with dynamic fees](https://github.com/ava-labs/avalanchego/pull/3189) -...