curl --request PUT \
  --url https://sandbox.layerfi.com/v1/businesses/{businessId}/bank-transactions/{transactionId}/metadata \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "Transaction_Metadata",
  "memo": "Example memo to associate with a transaction",
  "metadata": {
    "custom_field": "value",
    "any valid json": "below 1kb",
    "nested": {
      "meaning of life": 42,
      "array": []
    }
  },
  "reference_number": "<string>"
}
'

import requests

url = "https://sandbox.layerfi.com/v1/businesses/{businessId}/bank-transactions/{transactionId}/metadata"

payload = {
    "type": "Transaction_Metadata",
    "memo": "Example memo to associate with a transaction",
    "metadata": {
        "custom_field": "value",
        "any valid json": "below 1kb",
        "nested": {
            "meaning of life": 42,
            "array": []
        }
    },
    "reference_number": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    type: 'Transaction_Metadata',
    memo: 'Example memo to associate with a transaction',
    metadata: {
      custom_field: 'value',
      'any valid json': 'below 1kb',
      nested: {'meaning of life': 42, array: []}
    },
    reference_number: '<string>'
  })
};

fetch('https://sandbox.layerfi.com/v1/businesses/{businessId}/bank-transactions/{transactionId}/metadata', 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://sandbox.layerfi.com/v1/businesses/{businessId}/bank-transactions/{transactionId}/metadata",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'type' => 'Transaction_Metadata',
    'memo' => 'Example memo to associate with a transaction',
    'metadata' => [
        'custom_field' => 'value',
        'any valid json' => 'below 1kb',
        'nested' => [
                'meaning of life' => 42,
                'array' => [
                                
                ]
        ]
    ],
    'reference_number' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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://sandbox.layerfi.com/v1/businesses/{businessId}/bank-transactions/{transactionId}/metadata"

	payload := strings.NewReader("{\n  \"type\": \"Transaction_Metadata\",\n  \"memo\": \"Example memo to associate with a transaction\",\n  \"metadata\": {\n    \"custom_field\": \"value\",\n    \"any valid json\": \"below 1kb\",\n    \"nested\": {\n      \"meaning of life\": 42,\n      \"array\": []\n    }\n  },\n  \"reference_number\": \"<string>\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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.put("https://sandbox.layerfi.com/v1/businesses/{businessId}/bank-transactions/{transactionId}/metadata")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"type\": \"Transaction_Metadata\",\n  \"memo\": \"Example memo to associate with a transaction\",\n  \"metadata\": {\n    \"custom_field\": \"value\",\n    \"any valid json\": \"below 1kb\",\n    \"nested\": {\n      \"meaning of life\": 42,\n      \"array\": []\n    }\n  },\n  \"reference_number\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sandbox.layerfi.com/v1/businesses/{businessId}/bank-transactions/{transactionId}/metadata")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"type\": \"Transaction_Metadata\",\n  \"memo\": \"Example memo to associate with a transaction\",\n  \"metadata\": {\n    \"custom_field\": \"value\",\n    \"any valid json\": \"below 1kb\",\n    \"nested\": {\n      \"meaning of life\": 42,\n      \"array\": []\n    }\n  },\n  \"reference_number\": \"<string>\"\n}"

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

{
  "data": {
    "type": "Transaction_Metadata",
    "memo": "Example memo to associate with a transaction",
    "metadata": {
      "custom_field": "value",
      "any valid json": "below 1kb",
      "nested": {
        "meaning of life": 42,
        "array": []
      }
    },
    "reference_number": "<string>"
  }
}

{
  "type": "InvalidParameters",
  "description": "<string>",
  "error_enum": "InvalidPayload",
  "meta": {}
}