Method transfer

java/lib/src/main/java/io/github/ccxt/exchanges/HtxCore.java:7674–7763

@method @name htx#transfer @description transfer currency internally between wallets on the same account @see https://huobiapi.github.io/docs/dm/v1/en/#transfer-margin-between-spot-account-and-future-account @see https://huobiapi.github.io/docs/spot/v1/en/#transfer-fund-between-spot-account-and-futu

(Object code, Object amount, Object fromAccount2, Object toAccount, Object... optionalArgs)

     * @returns {object} a [transfer structure]{@link https://docs.ccxt.com/?id=transfer-structure}
     */
    public java.util.concurrent.CompletableFuture<Object> transfer(Object code, Object amount, Object fromAccount2, Object toAccount, Object... optionalArgs)
    {
        final Object fromAccount3 = fromAccount2;
        return java.util.concurrent.CompletableFuture.supplyAsync(() -> {
            Object fromAccount = fromAccount3;
            Object parameters = Helpers.getArg(optionalArgs, 0, new java.util.HashMap<String, Object>() {{}});
            (this.loadMarkets()).join();
            Object currency = this.currency(code);
            Object request = new java.util.HashMap<String, Object>() {{
                put( "currency", Helpers.GetValue(currency, "id") );
                put( "amount", Helpers.parseFloat(HtxCore.this.currencyToPrecision(code, amount)) );
            }};
            Object subType = null;
            var subTypeparametersVariable = this.handleSubTypeAndParams("transfer", null, parameters);
            subType = ((java.util.List<Object>) subTypeparametersVariable).get(0);
            parameters = ((java.util.List<Object>) subTypeparametersVariable).get(1);
            Object fromAccountId = this.convertTypeToAccount(fromAccount);
            Object toAccountId = this.convertTypeToAccount(toAccount);
            Object toCross = Helpers.isEqual(toAccountId, "cross");
            Object fromCross = Helpers.isEqual(fromAccountId, "cross");
            Object toIsolated = this.inArray(toAccountId, this.ids);
            Object fromIsolated = this.inArray(fromAccountId, this.ids);
            Object fromSpot = Helpers.isEqual(fromAccountId, "pro");
            Object toSpot = Helpers.isEqual(toAccountId, "pro");
            if (Helpers.isTrue(Helpers.isTrue(fromSpot) && Helpers.isTrue(toSpot)))
            {
                throw new BadRequest((String)Helpers.add(Helpers.add(Helpers.add(Helpers.add(this.id, " transfer () cannot make a transfer between "), fromAccount), " and "), toAccount)) ;
            }
            Object fromOrToFuturesAccount = Helpers.isTrue((Helpers.isEqual(fromAccountId, "futures"))) || Helpers.isTrue((Helpers.isEqual(toAccountId, "futures")));
            Object response = null;
            if (Helpers.isTrue(fromOrToFuturesAccount))
            {
                Object type = Helpers.add(Helpers.add(fromAccountId, "-to-"), toAccountId);
                type = this.safeString(parameters, "type", type);
                Helpers.addElementToObject(request, "type", type);
                response = (this.spotPrivatePostV1FuturesTransfer(this.extend(request, parameters))).join();
            } else if (Helpers.isTrue(Helpers.isTrue(fromSpot) && Helpers.isTrue(toCross)))
            {
                response = (this.privatePostCrossMarginTransferIn(this.extend(request, parameters))).join();
            } else if (Helpers.isTrue(Helpers.isTrue(fromCross) && Helpers.isTrue(toSpot)))
            {
                response = (this.privatePostCrossMarginTransferOut(this.extend(request, parameters))).join();
            } else if (Helpers.isTrue(Helpers.isTrue(fromSpot) && Helpers.isTrue(toIsolated)))
            {
                Helpers.addElementToObject(request, "symbol", toAccountId);
                response = (this.privatePostDwTransferInMargin(this.extend(request, parameters))).join();
            } else if (Helpers.isTrue(Helpers.isTrue(fromIsolated) && Helpers.isTrue(toSpot)))
            {
                Helpers.addElementToObject(request, "symbol", fromAccountId);
                response = (this.privatePostDwTransferOutMargin(this.extend(request, parameters))).join();
            } else
            {
                if (Helpers.isTrue(Helpers.isEqual(subType, "linear")))
                {
                    if (Helpers.isTrue(Helpers.isTrue((Helpers.isEqual(fromAccountId, "swap"))) || Helpers.isTrue((Helpers.isEqual(fromAccount, "linear-swap")))))
                    {
                        fromAccountId = "linear-swap";
                    } else