[erc20-balance-starknet] feat: new erc20-balance-starknet strategy

[wa0x6e]

Toward https://github.com/snapshot-labs/workflow/issues/562

This PR adds a new strategy to get scores, based on balance of a ERC-20 token on starknet

Depends on:

• feat: add starknet support to getProvider() and multicall() and to networks.json snapshot.js#1155

[Copilot]

Pull Request Overview

Adds a new Snapshot strategy for fetching ERC-20 token balances on Starknet, including schema, implementation, tests, examples, and docs.

• Introduce erc20-balance-starknet strategy in src/strategies
• Update test suite to validate Starknet addresses
• Add schema, examples, and README for the new strategy

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/strategy.test.ts	Updated tests to handle Starknet vs EVM addresses
src/strategies/index.ts	Registered new erc20-balance-starknet strategy
src/strategies/erc20-balance-starknet/schema.json	JSON schema for Starknet strategy parameters
src/strategies/erc20-balance-starknet/index.ts	Strategy implementation using Multicaller
src/strategies/erc20-balance-starknet/examples.json	Example input for Starknet strategy
src/strategies/erc20-balance-starknet/README.md	Documentation and parameter guide

Comments suppressed due to low confidence (1)

test/strategy.test.ts:114

• The test description refers to "checksum addresses," but Starknet addresses do not use an EVM checksum. Consider renaming this to something like "formatted addresses."

it('Returned addresses should be checksum addresses', () => {

[ChaituVR]

tAck