feat: add BridgeNode facilitator (Solana self-facilitation)

[BridgeNode-cc]

Summary

Add BridgeNode (https://bridgenode.cc) as an x402 facilitator.

BridgeNode is an AI inference bridge for AI agents — pay-per-request LLM inference via x402 on Solana USDC, with self-facilitation (in-process facilitator, fee sponsorship). This is a resubmission of #1078 with on-chain settlement evidence.

Changes

• packages/external/facilitators/src/facilitators/bridgenode.ts — new facilitator config:
  • Solana settler/fee-payer address: BHMDv3ri3LBEZjEzJgDZeUiguVX7LmsCstTXbM3dL8rN (USDC)
  • dateOfFirstTransaction: 2026-08-07 (first self-facilitated settlement)
  • Discovery: https://bridgenode.cc (OpenAPI + /.well-known/x402, facilitator block with kind: both)
• packages/external/facilitators/src/facilitators/index.ts — export registration
• packages/external/facilitators/src/lists/all.ts — added to the validated list
• apps/scan/public/bridgenode.jpg — facilitator logo (same asset served at https://bridgenode.cc/logos/bridgenode.jpg)

Evidence: real, on-chain-verified settlement volume

The x402-list.com indexer (independent, on-chain verification) reports for this address:

Metric	Value
Transactions (all-time)	863
Transactions (30d)	768
Unique buyers (30d, per-chain upper bound)	29
Settlement volume (all-time)	$6.58
Verification	on-chain
Last activity	2026-08-23

Public source: https://x402-list.com/api/v1/facilitators/bridgenode — verification: "on-chain", settler_count: 1.

Why x402scan shows 0 transactions for this origin

The BridgeNode origin is already registered here (7f221b2b-f7a3-4f69-a737-f6c55ea9d24d, verified), but its self-facilitated settlements are invisible to the sync indexer because the Solana transfer sync only scans known facilitator addresses (signer_pubkeys = [facilitatorConfig.address] in sync/transfers/trigger/chains/solana/bigquery/query.ts). Since BridgeNode's settler address is not yet in the facilitator list, its 768 tx/30d are never indexed — a chicken-and-egg: the volume bar cannot be observed until the facilitator is registered.

Adding this entry makes the existing on-chain volume visible immediately; the address uniqueness is enforced by the existing validateUniqueFacilitators compile-time check.

Notes

• Self-facilitation: payments settle directly to the BridgeNode payTo address; the registered address is the fee payer / settler used in BridgeNode's 402 envelope (extra.feePayer).
• Solana CAIP-2: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, USDC mint EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v.

[vercel]

@BridgeNode-cc is attempting to deploy a commit to the Merit Systems Team on Vercel.

A member of the Team first needs to authorize it.