feat: refactor graph runtime environment hardhat extension

[tmigone]

Motivation

This PR refactors the Graph Runtime Environment extension on hardhat. Currently most functionality is not using GRE and is instead using loadEnv which is a similar concept but inherited from the CLI.

In the future we should think about supporting a single environment for our tooling (CLI vs hardhat), the changes proposed to GRE here assume that future is built using hardhat tooling. New features should use GRE and hardhat environment, and we should aim towards slowly integrating the CLI functionality.

Changes

GRE now exposes and instanced address book, graph config and contracts:

// Use env vars to determine addressBook (ADDRESS_BOOK) and graphConfig (GRAPH_CONFIG) files 
const { addressBook, contracts, graphConfig } = hre.graph()

const graphTokenEntry = addressBook.getEntry("GraphToken")
console.log(`GraphToken address: ${graphTokenEntry.address}`)

const GraphToken = contracts.GraphToken
const totalSupply = await GraphToken.totalSupply()
console.log(`GRT totalSupply is ${totalSupply}`)

You can also specify paths to the graph config and address book files:

// Use custom addressBook and graphConfig files
const { addressBook, graphConfig } = hre.graph({
  addressBook: args.addressBook,
  graphConfig: args.graphConfig,
})

Signed-off-by: Tomás Migone tomas@edgeandnode.com

[codecov]

Codecov Report

Merging #636 (4acc4b1) into dev (bcb9876) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #636   +/-   ##
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  Coverage   90.29%   90.29%           
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  Files          35       35           
  Lines        1752     1752           
  Branches      293      293           
=======================================
  Hits         1582     1582           
  Misses        170      170           

Flag	Coverage Δ
unittests	90.29% <ø> (ø)

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[abarmat]

Good refactor

[abarmat]

🥇