new contrib scripts for checking blockbook and backend status

contrib/scripts/backend_status.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+die() { echo "error: $1" >&2; exit 1; }
+
+[[ $# -ge 1 ]] || die "missing coin argument. usage: blockbook_backend_status.sh <coin>"
+coin="$1"
+var="BB_RPC_URL_HTTP_${coin}"
+url="${!var-}"
+[[ -n "$url" ]] || die "environment variable ${var} is not set"
+user_var="BB_RPC_USER"
+pass_var="BB_RPC_PASS"
+user="${!user_var-}"
+pass="${!pass_var-}"
+auth=()
+if [[ -n "$user" || -n "$pass" ]]; then
+  [[ -n "$user" && -n "$pass" ]] || die "set both ${user_var} and ${pass_var}"
+  auth=(-u "${user}:${pass}")
+fi
+command -v curl >/dev/null 2>&1 || die "curl is not installed"
+command -v jq >/dev/null 2>&1 || die "jq is not installed"
+
+rpc() { curl -skS "${auth[@]}" -H 'content-type: application/json' --data "{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"$1\",\"params\":${2:-[]}}" "$url"; }
+
+resp="$(rpc eth_syncing)"
+if echo "$resp" | jq -e '.error|not' >/dev/null 2>&1; then
+  if echo "$resp" | jq -e '.result == false' >/dev/null 2>&1; then
+    bn="$(rpc eth_blockNumber)"
+    echo "$bn" | jq -e '.error|not' >/dev/null 2>&1 || die "eth_blockNumber failed"
+    hex="$(echo "$bn" | jq -r '.result')"
+    [[ -n "$hex" && "$hex" != "null" ]] || die "eth_blockNumber returned empty result"
+    height=$((16#${hex#0x}))
+    jq -n --argjson height "$height" '{backend:"evm", is_synced:true, height:$height}'
+  else
+    cur_hex="$(echo "$resp" | jq -r '.result.currentBlock')"
+    high_hex="$(echo "$resp" | jq -r '.result.highestBlock')"
+    [[ -n "$cur_hex" && "$cur_hex" != "null" ]] || die "eth_syncing returned empty currentBlock"
+    [[ -n "$high_hex" && "$high_hex" != "null" ]] || die "eth_syncing returned empty highestBlock"
+    cur=$((16#${cur_hex#0x}))
+    high=$((16#${high_hex#0x}))
+    jq -n --argjson height "$cur" --argjson highest "$high" \
+      '{backend:"evm", is_synced:false, height:$height, highest:$highest}'
+  fi
+  exit 0
+fi
+
+resp="$(rpc getblockchaininfo)"
+if echo "$resp" | jq -e '.result and (.error|not)' >/dev/null 2>&1; then
+  echo "$resp" | jq '{backend:"utxo", is_synced:(.result.initialblockdownload|not), height:.result.blocks, getblockchaininfo:.}'
+  exit 0
+fi
+
+die "backend did not return a valid eth_syncing or getblockchaininfo response"

contrib/scripts/blockbook_status.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+die() { echo "error: $1" >&2; exit 1; }
+[[ $# -ge 1 ]] || die "missing coin argument. usage: blockbook_status.sh <coin> [hostname]"
+coin="$1"
+if [[ -n "${2-}" ]]; then
+  host="$2"
+else
+  host="localhost"
+fi
+
+var="B_PORT_PUBLIC_${coin}"
+port="${!var-}"
+[[ -n "$port" ]] || die "environment variable ${var} is not set"
+command -v curl >/dev/null 2>&1 || die "curl is not installed"
+command -v jq >/dev/null 2>&1 || die "jq is not installed"
+
+curl -skv "https://${host}:${port}/api/status" | jq