BlockchainSubscribeForHeadBlockHashSubscribes to new block events (only retrieves the block hash).JavaScriptPythonRustGocURLconst res = await fetch("http://127.0.0.1:8648", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ jsonrpc: "2.0", method: "subscribeForHeadBlockHash", params: [], id: 1 }) }); const data = await res.json();ParametersNo parametersReturnsPropType / DefaultreturnValuenumberPreviousSubscribeForHeadBlockNextSubscribeForLogsByAddressesAndTypes