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RPC Verification Memo Chain 138 (DeFi Oracle Meta Mainnet)

Last Updated: 2026-01-31
Document Version: 1.0
Status: Active Documentation


Date: 2026-01-29
Audience: Partners, auditors, operators
Classification: Technical verification summary (one page)


1. Stack overview

Internet / LAN
      │
      ▼
DNS (rpc-http-pub.d-bis.org, rpc.d-bis.org, rpc2.d-bis.org, rpc.defi-oracle.io, etc.) → 76.53.10.36
      │
      ▼
UDM Pro port forward 76.53.10.36:443 → 192.168.11.167:443
      │
      ▼
NPMplus (192.168.11.167:443)  TLS termination, Host-based routing
      │
      ▼
Besu RPC  VMID 2201 (192.168.11.221:8545 HTTP, :8546 WebSocket)
      │
      ▼
Response: eth_chainId → 0x8a (Chain ID 138)

2. Validation results

Check Result
DNS Public hostnames resolve to 76.53.10.36
TLS Valid Let's Encrypt; CN matches hostname; TLS 1.3
Proxy NPMplus routes by Host to VMID 2201
Upstream Besu RPC (192.168.11.221:8545 / :8546) reachable and responsive
RPC eth_chainId returns 0x8a (138)
Chain DeFi Oracle Meta Mainnet sovereign EVM, no mainnet/testnet collision

Validation command (from a host that can reach NPMplus, e.g. LAN with Split DNS or --resolve):

curl -sk --resolve rpc-http-pub.d-bis.org:443:192.168.11.167 \
  https://rpc-http-pub.d-bis.org \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}'
# Expected: {"jsonrpc":"2.0","id":1,"result":"0x8a"}

3. Public endpoints

Endpoint Type Backend
https://rpc-http-pub.d-bis.org HTTP RPC 192.168.11.221:8545
wss://rpc-ws-pub.d-bis.org WebSocket RPC 192.168.11.221:8546
https://rpc.d-bis.org HTTP RPC 192.168.11.221:8545
https://rpc2.d-bis.org HTTP RPC 192.168.11.221:8545
wss://ws.rpc.d-bis.org WebSocket RPC 192.168.11.221:8546
wss://ws.rpc2.d-bis.org WebSocket RPC 192.168.11.221:8546
https://rpc.defi-oracle.io HTTP RPC 192.168.11.221:8545
wss://wss.defi-oracle.io WebSocket RPC 192.168.11.221:8546

Explorer: https://explorer.d-bis.org
Chain ID: 138 (0x8a)


4. Operational notes

  • LAN access: From inside the same network, public hostnames may not resolve back (NAT hairpin). Use Split DNS (internal A records to 192.168.11.167) or the --resolve curl pattern for testing.
  • Port forwarding: 76.53.10.36:80 and :443 → 192.168.11.167 (NPMplus). Confirmed on UDM Pro.
  • No auth: Public RPC endpoints do not require API keys or auth.

5. References

  • Verification detail: RPC_CHAIN138_VERIFICATION.md
  • Wallet/SDK configs: CHAIN138_WALLET_CONFIG_VALIDATION.md
  • IDS/IPS and WebSockets: IDS_IPS_WEBSOCKET_GUIDANCE.md