status-go/_assets/scripts/rpc.sh

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#!/usr/bin/env bash
set -euo pipefail
RPC_HOST="${RPC_HOST:-localhost}"
RPC_PORT="${RPC_PORT:-8545}"
RPC_URL="${RPC_URL:-http://${RPC_HOST}:${RPC_PORT}/}"
METHOD="$1"
shift
PARAMS=("$@")
if [[ -z "${METHOD}" ]]; then
echo "No method specified!" >&2
exit 1
fi
# Parameter expansion trick to avoid var unbound error.
if [[ -z "${PARAMS-}" ]]; then
PARAMS_STR=''
else
PARAMS_STR=$(printf '%s\",\"' "${PARAMS[@]}")
PARAMS_STR="\"${PARAMS_STR%%\",\"}\""
fi
PAYLOAD="{
\"id\": 1,
\"jsonrpc\": \"2.0\",
\"method\": \"${METHOD}\",
\"params\": [${PARAMS_STR}]
}"
OUT=$(
curl --fail --show-error --silent \
-H "Content-type:application/json" \
-X POST --data "${PAYLOAD}" \
"${RPC_URL}"
)
echo "${OUT}" | jq .