From d65baa02f2250607d3f4120a42c34bcdd2206dfd Mon Sep 17 00:00:00 2001
From: defiQUG <defi@defi-oracle.io>
Date: Sat, 28 Mar 2026 15:56:42 -0700
Subject: [PATCH] Add Chain 138 RPC capability verification

---
 scripts/verify/check-chain138-rpc-health.sh | 64 ++++++++++++++++++++-
 1 file changed, 61 insertions(+), 3 deletions(-)

diff --git a/scripts/verify/check-chain138-rpc-health.sh b/scripts/verify/check-chain138-rpc-health.sh
index 4fd4b26..846cb41 100755
--- a/scripts/verify/check-chain138-rpc-health.sh
+++ b/scripts/verify/check-chain138-rpc-health.sh
@@ -1,9 +1,11 @@
 #!/usr/bin/env bash
-# Chain 138 — RPC health: parallel head check + per-node peer count.
-# Exit 0 if all HTTP RPCs respond, head spread <= max_blocks_spread, each peer count >= min_peers.
+# Chain 138 — RPC health: parallel head check + per-node peer count + public RPC capability probe.
+# Exit 0 if all HTTP RPCs respond, head spread <= max_blocks_spread, each peer count >= min_peers,
+# and the public RPC capability probe matches the currently documented support matrix.
 #
 # Usage: ./scripts/verify/check-chain138-rpc-health.sh
-# Env: RPC_MAX_HEAD_SPREAD (default 12), RPC_MIN_PEERS (default 10), RPC_TIMEOUT_SEC (default 20)
+# Env: RPC_MAX_HEAD_SPREAD (default 12), RPC_MIN_PEERS (default 10), RPC_TIMEOUT_SEC (default 20),
+#      CHAIN138_PUBLIC_RPC_URL (default https://rpc-http-pub.d-bis.org)
 
 set -euo pipefail
 
@@ -15,6 +17,7 @@ source "${PROJECT_ROOT}/config/ip-addresses.conf" 2>/dev/null || true
 MAX_SPREAD="${RPC_MAX_HEAD_SPREAD:-12}"
 MIN_PEERS="${RPC_MIN_PEERS:-10}"
 TO="${RPC_TIMEOUT_SEC:-20}"
+PUBLIC_RPC_URL="${CHAIN138_PUBLIC_RPC_URL:-https://rpc-http-pub.d-bis.org}"
 
 # VMID|IP (HTTP :8545)
 RPC_ROWS=(
@@ -89,6 +92,61 @@ fi
 
 if [[ "$fail" -eq 0 ]]; then
   echo "OK: all RPCs responded, peers >= $MIN_PEERS, spread <= $MAX_SPREAD"
+else
+  echo "FAIL: $fail check(s) failed"
+fi
+
+echo
+echo "Chain 138 public RPC capability probe ($PUBLIC_RPC_URL)"
+
+rpc_request() {
+  local method="$1"
+  local params="${2:-[]}"
+  curl -sS -m "$TO" -X POST "$PUBLIC_RPC_URL" \
+    -H "Content-Type: application/json" \
+    -d "{\"jsonrpc\":\"2.0\",\"method\":\"${method}\",\"params\":${params},\"id\":1}"
+}
+
+check_supported_method() {
+  local method="$1"
+  local params="${2:-[]}"
+  local response result
+  response="$(rpc_request "$method" "$params" || printf '%s' '{"error":"curl"}')"
+  result="$(printf '%s' "$response" | jq -r '.result // empty' 2>/dev/null || true)"
+  if [[ -n "$result" ]]; then
+    printf '  %-32s %s\n' "$method" "OK"
+    return 0
+  fi
+  printf '  %-32s %s\n' "$method" "FAIL"
+  ((fail++)) || true
+  return 1
+}
+
+check_expected_missing_method() {
+  local method="$1"
+  local params="${2:-[]}"
+  local response code message
+  response="$(rpc_request "$method" "$params" || printf '%s' '{"error":"curl"}')"
+  code="$(printf '%s' "$response" | jq -r '.error.code // empty' 2>/dev/null || true)"
+  message="$(printf '%s' "$response" | jq -r '.error.message // empty' 2>/dev/null || true)"
+  if [[ "$code" == "-32601" || "$message" == "Method not found" ]]; then
+    printf '  %-32s %s\n' "$method" "EXPECTED_MISSING"
+    return 0
+  fi
+  printf '  %-32s %s\n' "$method" "UNEXPECTED"
+  ((fail++)) || true
+  return 1
+}
+
+check_supported_method "eth_chainId"
+check_supported_method "eth_gasPrice"
+check_supported_method "eth_feeHistory" "[\"0x1\", \"latest\", []]"
+check_supported_method "trace_block" "[\"0x1\"]"
+check_supported_method "trace_replayBlockTransactions" "[\"0x1\", [\"trace\"]]"
+check_expected_missing_method "eth_maxPriorityFeePerGas"
+
+if [[ "$fail" -eq 0 ]]; then
+  echo "OK: node health and public RPC capability checks passed"
   exit 0
 fi
 echo "FAIL: $fail check(s) failed"