#### URL Expired

The URL for this request expired after 30 days.

Blockchain-specific options for transaction intents. At most one of `EVM`, `Bitcoin`, `Substrate`, `Solana`, `Canton`, `Stellar`, or `TVM` may be set; the server rejects multiple families in one request.

**OperationID**  
string  
Unique operation identifier.

**InitiatorID**  
string  
Initiator identifier.

**ChainName**  
string

**CAIP19**  
string

**Asset**  
string  
required

**TestNetwork**  
boolean  
truefalse

**Source**  
object  
required  
Identifies an on-chain address in transaction intents and related APIs. Either set both `MasterKeyName` and `AccountName` (with optional `AddressIndex` where the API allows it; index `0` is the main address when deriving), or set `Address` to a literal address string. Setting only one of `MasterKeyName` or `AccountName` is invalid. For [`POST /solana/accountInfo`](https://vault.docs.blockdaemon.com/reference/cwpstartsponsor-1#/paths/~1solana~1accountInfo/post), when not sending `Address`, `AddressIndex` is required alongside master key and account.

**Source object**

**ContractAddress**  
string  
Target contract; empty means code-reset.

**EVM**  
object  
required  
Optional EVM-specific parameters.

**EVM object**

**Bitcoin**  
object  
Optional Bitcoin-specific parameters.

**Bitcoin object**

**Substrate**  
object  
Optional Substrate-specific parameters.

**Substrate object**

**Solana**  
object  
Optional Solana-specific parameters.

**Solana object**

**Canton**  
object  
Optional Canton-specific parameters.

**Canton object**

**Stellar**  
object  
Optional Stellar-specific parameters.

**Stellar object**

**TVM**  
object  
Optional TVM-specific parameters.

**TVM object**

# `` 200      Operation started

# `` 400      Invalid input, validation error, or malformed request

# `` 500      Internal server error. May include an `errorCode` (M-prefixed) and `data` from the MPA error code system. See `cwpapi/errors.go` for codes.

---

**Base URL**  
https://api.your-wallet.blockdaemon-wallet.com/api/cwp/operations/start/sponsor

```
xxxxxxxxxx

curl --request POST \

--url https://api.your-wallet.blockdaemon-wallet.com/api/cwp/operations/start/sponsor \

--header 'accept: application/json' \

--header 'content-type: application/json'
```

**Response Codes**:  
application/json  
``200``  
``400``  
``500``