#!/bin/bash
# Start an isolated single-node fork chain with the AERE future-EIP precompiles
# (0x0AE1-0x0AE7) active from genesis. Ethash + instant low-difficulty mining.
set -uo pipefail

# Paths are parameterized so this script runs as-is in a clean checkout. Override
# any of them in the environment. Previously these were hardcoded to a build
# operator's home directory, which both disclosed an internal layout and made the
# script unrunnable for anyone else without editing it.
#   AERE_BESU_BIN   path to the built besu launcher
#   AERE_WORK_DIR   scratch directory for node data and logs (WILL BE DELETED)
#   AERE_STAGING    directory holding bench/genesis.json and the KAT vectors
BESU="${AERE_BESU_BIN:-${HOME}/besu/build/install/besu/bin/besu}"
WORK_DIR="${AERE_WORK_DIR:-/tmp/aere-bench}"
STAGING="${AERE_STAGING:-$(cd "$(dirname "$0")/.." && pwd)}"

NODE_DIR="${WORK_DIR}/node"
NODE_LOG="${WORK_DIR}/node.log"
mkdir -p "${WORK_DIR}"
rm -rf "${NODE_DIR}"
nohup "$BESU" \
  --data-path="${NODE_DIR}" \
  --genesis-file="${STAGING}/bench/genesis.json" \
  --network-id=28777 \
  --miner-enabled --miner-coinbase=0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf \
  --min-gas-price=0 \
  --rpc-http-enabled --rpc-http-host=127.0.0.1 --rpc-http-port=8545 \
  --rpc-http-api=ETH,NET,WEB3,DEBUG,TXPOOL \
  --host-allowlist='*' \
  > "${NODE_LOG}" 2>&1 &
echo "besu pid $!"
echo "waiting for RPC..."
for i in $(seq 1 60); do
  bn=$(curl -s -X POST http://127.0.0.1:8545 -H 'Content-Type: application/json' \
     --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' 2>/dev/null | grep -o '"result":"[^"]*"')
  if [ -n "$bn" ]; then echo "RPC up: $bn"; break; fi
  sleep 2
done
tail -5 "${NODE_LOG}"