(Delphi ActiveX) Bitfinex v2 REST Tickers

The tickers endpoint provides a high level overview of the state of the market. It shows the current best bid and ask, the last traded price, as well as information on the daily volume and price movement over the last day. The endpoint can retrieve multiple tickers with a single query.

For more information, see https://docs.bitfinex.com/reference#rest-public-tickers

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
success: Integer;
sbResponseBody: TChilkatStringBuilder;
jarrResp: TChilkatJsonArray;
respStatusCode: Integer;
jarr_1: IChilkatJsonArray;
j: Integer;
count_j: Integer;
strVal: WideString;
i: Integer;
count_i: Integer;

begin
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

// curl https://api-pub.bitfinex.com/v2/tickers?symbols=tBTCUSD,tLTCUSD,fUSD

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

sbResponseBody := TChilkatStringBuilder.Create(Self);
success := http.QuickGetSb('https://api-pub.bitfinex.com/v2/tickers?symbols=tBTCUSD,tLTCUSD,fUSD',sbResponseBody.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

jarrResp := TChilkatJsonArray.Create(Self);
jarrResp.LoadSb(sbResponseBody.ControlInterface);
jarrResp.EmitCompact := 0;

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(jarrResp.Emit());

respStatusCode := http.LastStatus;
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(http.LastHeader);
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// [
//   [
//     "tBTCUSD",
//     9318.6,
//     21.53815472,
//     9318.7,
//     5.30463105,
//     223.5,
//     0.0246,
//     9318.7,
//     4125.21689058,
//     9370.998872,
//     9075.80199233
//   ],
//   [
//     "tLTCUSD",
//     44.008,
//     1807.8617840300003,
//     44.019,
//     2394.7625575100005,
//     2.359,
//     0.0566,
//     44.019,
//     27051.34115724,
//     44.16,
//     41.559
//   ],
//   [
//     "fUSD",
//     0.00022955068493150685,
//     0.000199,
//     30,
//     871597.2359141599,
//     0.0001962,
//     2,
//     67926.11558407999,
//     -0.00001146,
//     -0.0523,
//     0.00020757,
//     167542924.22214913,
//     0.00024,
//     0.00000299,
//     null,
//     null,
//     82649109.90968154
//   ]
// ]

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

i := 0;
count_i := jarrResp.Size;
while i < count_i do
  begin
    jarr_1 := jarrResp.ArrayAt(i);
    j := 0;
    count_j := jarr_1.Size;
    while j < count_j do
      begin
        strVal := jarr_1.StringAt(j);
        j := j + 1;
      end;

    i := i + 1;
  end;
end;