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feat: add geth network info helper

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Added the geth-net-info.sh script, which displays the chainId and last block number for a running geth via RPC.
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LumenSolutions 2025-12-15 18:36:14 +01:00 committed by GitHub
parent 6978ab48aa
commit 5f2d156a08
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scripts/geth-net-info.sh Normal file
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```bash
#!/usr/bin/env bash
set -euo pipefail
```
# Prints basic network information by attaching to a running geth instance.
#
# Usage:
# ./scripts/geth-net-info.sh
#
# By default it attaches to http://127.0.0.1:8545. Override via:
# RPC_URL=http://host:port ./scripts/geth-net-info.sh
RPC_URL="${RPC_URL:-http://127.0.0.1:8545}"
echo "Using RPC URL: ${RPC_URL}"
echo
payload='{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}'
chain_id=$(curl -s -X POST "${RPC_URL}" -H "Content-Type: application/json" -d "${payload}" | jq -r '.result // empty')
if [ -z "${chain_id}" ]; then
echo "Failed to fetch chainId. Is geth running and RPC enabled?"
exit 1
fi
payload_block='{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'
block_number=$(curl -s -X POST "${RPC_URL}" -H "Content-Type: application/json" -d "${payload_block}" | jq -r '.result // empty')
echo "chainId: ${chain_id}"
echo "latest block: ${block_number}"