synchronize-ready.sh

#!/bin/bash
set -x

trap graceful_shutdown SIGINT SIGQUIT SIGTERM

graceful_shutdown()
{
    echo "begin shutdown..."

    # stop target
    kill -2 $TARGET_PID
    
    # stop teku 
    kill -2 $TEKU_PID
    
    # check that processes have terminated.
    TARGET_GREP="target"
    TEKU_GREP="teku"

    while [ ! -z "$TARGET_GREP" ] || [ ! -z "$TEKU_GREP" ]
    do
        sleep 10
        TARGET_GREP=""
        if [ ! -z "$TARGET_GREP_STR" ]; then
            TARGET_GREP=`ps axo pid,ppid,cmd | grep "$TARGET_GREP_STR"`
        fi
        TEKU_GREP=""
        if [ ! -z "$TEKU_GREP_STR" ]; then
            TEKU_GREP=`ps axo pid,ppid,cmd | grep "$TEKU_GREP_STR"`
        fi
    done

    echo "Sync shutdown success"
    exit
}

CONFIG_FILE=$(pwd)/config.toml
TARGET=$1

get_config () {
    stoml $CONFIG_FILE $1
}


# get working dir
WORKING_DIR=$HOME
OUTPUT_DIR=$(get_config "output_dir")
echo "WAIT" > $OUTPUT_DIR/ipc-$TARGET.dat

# start target
TARGET_LOG="$OUTPUT_DIR/$TARGET-sync-$(date -Iseconds).log"
TARGET_CMD=$(get_config "$TARGET.exec_cmd")
DATA_DIR_PARAM=$(get_config "$TARGET.datadir_flag")=$WORKING_DIR/$(get_config "$TARGET.datadir")

JWT_FLAG=$(get_config "$TARGET.jwt_flag")
TARGET_JWT_FILE=$WORKING_DIR/$(get_config "$TARGET.jwt_path")
if [ ! -z $JWT_FLAG ]; then
    JWT_PARAM="$JWT_FLAG=$TARGET_JWT_FILE"
fi 

{ $TARGET_CMD $JWT_PARAM $DATA_DIR_PARAM &> $TARGET_LOG; } &
sleep 2
TARGET_PPID=$!
TARGET_GREP_STR=$TARGET_PPID.*$(get_config "$TARGET.grep_str")
TARGET_PID=`ps axo pid,ppid,cmd | grep "$TARGET_GREP_STR" | awk '{print $1}'`

sleep 60

# start teku
TEKU_LOG=$OUTPUT_DIR/teku-sync-$(date -Iseconds).log
{ teku --ee-endpoint=http://localhost:8551 --ee-jwt-secret-file=$TARGET_JWT_FILE --data-beacon-path=$WORKING_DIR/nvme/teku-data-dir/ &> $TEKU_LOG; } &
sleep 2
TEKU_PPID=$!
TEKU_GREP_STR=$TEKU_PPID.*teku\\.home
TEKU_PID=`ps axo pid,ppid,cmd | grep $TEKU_GREP_STR | awk '{print $1}'`

sleep 2

# check is synchonized < 2 blocks from etherscan
SYNC_DISTANCE=10000

# wait ~10 min for nethermind ports to init
if [ "$TARGET" = "nethermind" ]; then
    sleep 120
fi

while [ true ]
do
    # wait 30 seconds
    sleep 30

    # curl to etherscan
    ETHERSCAN_BLOCK_HEX=`curl 'https://api.etherscan.io/api?module=proxy&action=eth_blockNumber&apikey='"$ETHERSCAN_API_KEY" | jq -r .result | awk '{ print substr( $0, 3 ) }' | awk '{print toupper($0)}'`
    ETHERSCAN_BLOCK=`echo "obase=10; ibase=16; $ETHERSCAN_BLOCK_HEX" | bc`

    # curl to target and get number
    TARGET_BLOCK_HEX=`curl --data '{"method":"eth_getBlockByNumber","params":["latest", false],"id":1,"jsonrpc":"2.0"}' -H "Content-Type: application/json" -X POST 127.0.0.1:8545 | jq -r .result.number | awk '{ print substr( $0, 3 ) }' | awk '{print toupper($0)}'`
    TARGET_BLOCK=`echo "obase=10; ibase=16; $TARGET_BLOCK_HEX" | bc`

    # compute distances
    SYNC_DISTANCE=$(( $ETHERSCAN_BLOCK - $TARGET_BLOCK ))
    echo "Sync distance: $SYNC_DISTANCE"


    if [ $SYNC_DISTANCE -lt 2 ]; then
        echo "READY" > $OUTPUT_DIR/ipc-$TARGET.dat
    fi

done