async function pingRpc() {
	const address = await current_signer.getAddress();
	const balance = await current_provider.getBalance(address);
	let set = STATE.RPC_PING;
	let rst = 0;
	let r = {
		balance: balance,
		address: address,
	}
	if (balance < g_minBalance) {
		set |= STATE.EVM_BALANCE_LOW;
	} else {
		rst = STATE.EVM_BALANCE_LOW;
	}
	stateChange(r, set, rst);
}