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POST
/
api
/
vault
/
merge-signature
Get backend co-signature for vault.mergePositions
curl --request POST \
  --url https://core.api.dev.predictstreet.sde.adifoundation.ai/api/vault/merge-signature \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "marketId": "NC26-BIN-83479265",
  "amount": "30"
}
'
{
  "pendingMergeId": "<string>",
  "kind": 123,
  "collateralToken": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
  "conditionId": "<string>",
  "partition": [
    "1",
    "2"
  ],
  "salt": "<string>",
  "deadline": 123,
  "vaultAddress": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb3",
  "backendSig": "<string>",
  "amount": "<string>"
}

Authorizations

​
X-Api-Key
string
header
required

Partner / integrator key — format ps_live_<keyId>_<secret>. Issued by PredictStreet ops via the admin panel; 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).