Get existing orders from the list of UIDs.

curl --request POST \
  --url https://api.cow.fi/mainnet/api/v1/orders/by_uids \
  --header 'Content-Type: application/json' \
  --data '
[
  "0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a"
]
'

import requests

url = "https://api.cow.fi/mainnet/api/v1/orders/by_uids"

payload = ["0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a"]
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify([
    '0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a'
  ])
};

fetch('https://api.cow.fi/mainnet/api/v1/orders/by_uids', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.cow.fi/mainnet/api/v1/orders/by_uids",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    '0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.cow.fi/mainnet/api/v1/orders/by_uids"

	payload := strings.NewReader("[\n  \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n]")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.cow.fi/mainnet/api/v1/orders/by_uids")
  .header("Content-Type", "application/json")
  .body("[\n  \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n]")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.cow.fi/mainnet/api/v1/orders/by_uids")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "[\n  \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n]"

response = http.request(request)
puts response.read_body

{
  "order": {
    "sellToken": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "buyToken": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "sellAmount": "1234567890",
    "buyAmount": "1234567890",
    "validTo": 123,
    "feeAmount": "1234567890",
    "kind": "buy",
    "partiallyFillable": true,
    "signingScheme": "eip712",
    "signature": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "appData": "{\"version\":\"0.9.0\",\"metadata\":{}}",
    "creationDate": "2020-12-03T18:35:18.814523Z",
    "class": "market",
    "owner": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "uid": "0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a",
    "executedSellAmount": "1234567890",
    "executedSellAmountBeforeFees": "1234567890",
    "executedBuyAmount": "1234567890",
    "executedFeeAmount": "1234567890",
    "invalidated": true,
    "status": "presignaturePending",
    "settlementContract": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "receiver": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "sellTokenBalance": "erc20",
    "buyTokenBalance": "erc20",
    "from": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "quoteId": 123,
    "appDataHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "fullBalanceCheck": false,
    "availableBalance": "1234567890",
    "isLiquidityOrder": true,
    "ethflowData": {
      "refundTxHash": "0xd51f28edffcaaa76be4a22f6375ad289272c037f3cc072345676e88d92ced8b5",
      "userValidTo": 123
    },
    "onchainUser": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "onchainOrderData": {
      "sender": "0x6810e776880c02933d47db1b9fc05908e5386b96",
      "placementError": "QuoteNotFound"
    },
    "executedFee": "1234567890",
    "executedFeeToken": "0x6810e776880c02933d47db1b9fc05908e5386b96",
    "fullAppData": "<string>",
    "quote": {
      "gasAmount": "150000",
      "gasPrice": "15000000000",
      "sellTokenPrice": "1000000000",
      "sellAmount": "1234567890",
      "buyAmount": "1234567890",
      "feeAmount": "1234567890",
      "solver": "0x6810e776880c02933d47db1b9fc05908e5386b96",
      "verified": true,
      "metadata": {}
    },
    "interactions": {
      "pre": [
        {
          "target": "0x6810e776880c02933d47db1b9fc05908e5386b96",
          "value": "1234567890",
          "callData": "0xca11da7a"
        }
      ],
      "post": [
        {
          "target": "0x6810e776880c02933d47db1b9fc05908e5386b96",
          "value": "1234567890",
          "callData": "0xca11da7a"
        }
      ]
    }
  }
}