feat: add Arbital to mainnet protocols

[dak-agent]

Arbital

Adds mainnet/arbital.jsonc — Arbital (arbital.xyz), an all-in-one non-custodial trading terminal for memecoins, tokenized stocks (via xStocks), and perpetuals (up to 40x), plus automated market-making across 14+ perp DEXes. YC-backed.

Category: DeFi::Trading Interfaces

Monad support

• Deposit source: Monad is one of the supported networks you can fund from. Deposits are USDC and settle as Solana USDC ("Available Cash") — cross-chain routing is handled by Relay today (Relay Depository on Monad: 0x4cd00e387622c35bddb9b4c962c136462338bc31), with Arbital's own infra in progress.
• Tradable Monad assets: the terminal surfaces Monad as a first-class chain filter and lists Monad-ecosystem assets (e.g. WMON) as tradable markets.

Why addresses is empty

Arbital has no dedicated contracts deployed on Monad at this time — the Monad flow rides on Relay's shared infrastructure rather than an Arbital-deployed contract, and no Arbital Monad address is published. The registry format explicitly permits an empty address map; a comment in the file records this. Happy to add addresses in a follow-up once Arbital ships native Monad infra.

Validation

python scripts/validate_protocol.py --network mainnet passes (exit 0). The only output for this file is the expected ⚠️ empty address map warning.

[github-actions]

Contract Verification Results

Changed Files

• mainnet/arbital.jsonc

Verification Output

Verifying 1 protocol file(s)...

  ✗ Arbital - No addresses found

================================================================================
                         CONTRACT VERIFICATION RESULTS                          
================================================================================

⊘ Arbital (arbital.jsonc)
  └─ No addresses found

================================================================================
                                    SUMMARY                                     
================================================================================
  Files Processed:     1
  Addresses Checked:   0
  ✓ Verified:          0
  ✗ Not Verified:      0
================================================================================

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_{Workflow run: Verify PR Contracts}