RPC bumpfee with an explicit feerate using `conf_target` and `estimate_mode` errors with `JSONRPCException: JSON integer out of range (-1)`.
{
    return RPCHelpMan{"getunconfirmedbalance",
                "DEPRECATED\nIdentical to getbalances().mine.untrusted_pending\n",
                {},
                RPCResult{RPCResult::Type::NUM, "", "The balance"},
                RPCExamples{""},
        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
{
    std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
    if (!wallet) return NullUniValue;
    const CWallet* const pwallet = wallet.get();
    
    
    pwallet->BlockUntilSyncedToCurrentChain();
    LOCK(pwallet->cs_wallet);
    return ValueFromAmount(pwallet->GetBalance().m_mine_untrusted_pending);
},
    };
}
static RPCHelpMan sendmany()