Add first-pass ARC network support

[tmcollins4]

Summary

Adds first-pass ARC testnet support as an EVM-compatible chain.

• Configures ARC testnet in bitcore-test.config.json via ./moralis
• Adds ARC chain ID/default network/18-decimal native units in crypto-wallet-core
• Reuses ETH derivation, validation, native tx, and ERC20 tx providers for ARC
• Treats ARC as an EVM chain in bitcore-client
• Adds focused tests for derivation, validation, native txs, ERC20 txs, and client EVM recognition

Notes / Follow-ups

ARC native USDC and the ARC ERC-20 USDC interface represent the same underlying balance with different units:

• Native ARC balance: 18 decimals
• ERC-20 USDC interface 0x3600000000000000000000000000000000000000: 6 decimals

Follow-up work is needed for:

• BitPay /currencies metadata for native ARC and ARC USDC
• BWS/BWC handling so native ARC and ERC-20 USDC are not double-counted
• Fee/spend checks, because gas and ERC-20 USDC transfers draw from the same underlying USDC balance

Validation

Automated:

• packages/crypto-wallet-core: npm run test
• packages/bitcore-client: npm run compile
• packages/bitcore-client: ./node_modules/.bin/mocha -r tsx --exit 'test/unit/wallet.arc.test.ts'

Manual smoke:

• Started bitcore-node with ARC testnet configured via ./moralis
• Verified ARC enabled-chain, fee, priority fee, and nonce routes
• Smoke tested bitcore-client CLI:
  • wallet-create
  • wallet-derive
  • wallet-balance
  • wallet-send
• Confirmed native ARC send on testnet:
  • 0x686cd1fa60743fc35a61ead24e2f37a9444907eab1dfa3658208668a6c6e5ed1

[Copilot]

Pull request overview

Adds first-pass ARC testnet support by treating ARC as an EVM-compatible chain across crypto-wallet-core, bitcore-client, and the bitcore-node test configuration.

Changes:

• Adds ARC chain metadata (EVM chain list membership, default testnet network, chain ID, native units, derivation path) and wires ARC into existing ETH/EVM providers for derivation/validation/transactions.
• Extends bitcore-client wallet logic to recognize ARC as an EVM chain and adds a focused unit test.
• Adds/updates tests in crypto-wallet-core for ARC derivation, validation, chainId, native tx creation, ERC20 tx creation, and units.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/crypto-wallet-core/test/validation.test.ts	Adds ARC address + URI validation tests.
packages/crypto-wallet-core/test/transactions.test.ts	Adds ARC tx/chainId/units tests and imports Constants.
packages/crypto-wallet-core/test/address.test.ts	Adds ARC derivation path + address derivation test.
packages/crypto-wallet-core/src/validation/index.ts	Registers ARC validation via ETH validation logic.
packages/crypto-wallet-core/src/transactions/index.ts	Registers ARC native + ARC ERC20 tx providers.
packages/crypto-wallet-core/src/derivation/paths.ts	Adds ARC derivation path base (EVM-style).
packages/crypto-wallet-core/src/derivation/index.ts	Registers ARC deriver using ETH deriver.
packages/crypto-wallet-core/src/constants/units.ts	Adds ARC native units (18-decimal base units).
packages/crypto-wallet-core/src/constants/chains.ts	Adds ARC to EVM chains + ARC testnet chain ID + default testnet network.
packages/bitcore-client/test/unit/wallet.arc.test.ts	Adds unit test asserting ARC is treated as EVM chain.
packages/bitcore-client/src/wallet.ts	Adds ARC to EVM chain libs and isEvmChain() list.
bitcore-test.config.json	Adds ARC testnet external provider configuration (Moralis module + RPC host).

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[kajoseph]

In addition to some of the feedback from copilot above...