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POST
/
api
/
vault
/
merge-signature
Get backend co-signature for vault.mergePositions
curl --request POST \
  --url https://core-api.adipredictstreet.com/api/vault/merge-signature \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "marketId": "NC26-BIN-83479265",
  "amount": "30"
}
'
import requests

url = "https://core-api.adipredictstreet.com/api/vault/merge-signature"

payload = {
    "marketId": "NC26-BIN-83479265",
    "amount": "30"
}
headers = {
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)
const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({marketId: 'NC26-BIN-83479265', amount: '30'})
};

fetch('https://core-api.adipredictstreet.com/api/vault/merge-signature', 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://core-api.adipredictstreet.com/api/vault/merge-signature",
  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([
    'marketId' => 'NC26-BIN-83479265',
    'amount' => '30'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($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://core-api.adipredictstreet.com/api/vault/merge-signature"

	payload := strings.NewReader("{\n  \"marketId\": \"NC26-BIN-83479265\",\n  \"amount\": \"30\"\n}")

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

	req.Header.Add("X-Api-Key", "<api-key>")
	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://core-api.adipredictstreet.com/api/vault/merge-signature")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"marketId\": \"NC26-BIN-83479265\",\n  \"amount\": \"30\"\n}")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://core-api.adipredictstreet.com/api/vault/merge-signature")

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

request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"marketId\": \"NC26-BIN-83479265\",\n  \"amount\": \"30\"\n}"

response = http.request(request)
puts response.read_body
{
  "pendingMergeId": "<string>",
  "kind": 123,
  "collateralToken": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
  "conditionId": "<string>",
  "partition": [
    "1",
    "2"
  ],
  "salt": "<string>",
  "deadline": 123,
  "vaultAddress": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
  "backendSig": "<string>",
  "amount": "<string>"
}
{
  "error": {
    "code": "bad_request",
    "message": "<string>",
    "details": {},
    "trace_id": "<string>"
  },
  "status": 400
}

Authorizations

​
X-Api-Key
string
header
required

Partner / integrator key — format ps_live_<keyId>_<secret>. Issued by PredictStreet ops on request; never self-service. Never ship to a browser. multi_wallet partners must additionally send X-User-Wallet: 0x<40-hex> on every authenticated request to declare the acting wallet. See the API keys guide for scope taxonomy, partner kinds, rate limits, and rotation procedure.

Headers

​
X-User-Wallet
string

Required for multi_wallet partners on every authenticated request; ignored for single_wallet. Declares the acting end-user wallet for this request — drives KYC checks, balances/positions/orders attribution, rate-limit buckets, and audit. Lower-cased server-side. Missing on a multi_wallet key → 401 api_key_user_wallet_required; malformed → 401 api_key_user_wallet_invalid. The on-chain CTFExchange/Vault contracts still verify EIP-712 signer ↔ vault binding, so loosening API-layer attribution is safe by construction.

Pattern: ^0x[a-fA-F0-9]{40}$
Example:

"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3"

Body

application/json
​
marketId
string
required
Example:

"NC26-BIN-83479265"

​
amount
string
required

Decimal USDC amount the merge unwraps. Burns equal units of YES + NO inside the vault and credits this much USDC.

Example:

"30"

Response

Backend co-signature ready

​
pendingMergeId
string
required

Stable audit id derived from (wallet, marketId, amountWei, salt). Idempotent for retries.

​
kind
integer
required

0 = binary, 1 = neg-risk.

​
collateralToken
string
required
Pattern: ^0x[a-fA-F0-9]{40}$
Example:

"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3"

​
conditionId
string
required
Pattern: ^0x[0-9a-fA-F]{64}$
​
partition
string[]
required
Example:
["1", "2"]
​
salt
string
required
​
deadline
integer
required
​
vaultAddress
string
required

EIP-712 verifyingContract for the MergePositions struct (the vault, not the factory).

Pattern: ^0x[a-fA-F0-9]{40}$
Example:

"0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3"

​
backendSig
string
required

Backend co-signature; pair with the owner's EIP-712 signature in vault.mergePositions(...).

Pattern: ^0x[a-fA-F0-9]+$
​
amount
string

USDC wei (6-decimal).