Get withdrawal signing data

Get the data a user must sign to request a withdrawal.

POST /api/v4/dexbuilder/withdraw/sign_data

Get withdrawal signing data

cURL

curl --request POST \
  --url https://api.dexbuilder.com/api/v4/dexbuilder/withdraw/sign_data \
  --header 'Content-Type: application/json' \
  --header 'KEY: <api-key>' \
  --header 'SIGN: <api-key>' \
  --header 'Timestamp: <api-key>' \
  --header 'X-User-Wallet-Address: <x-user-wallet-address>' \
  --data '
{
  "chain": "ethereum",
  "token_symbol": "<string>",
  "token_address": "<string>",
  "token_amount": "<string>",
  "address": "<string>",
  "to_address": "<string>"
}
'

200

Example

{
  "code": 0,
  "message": "success",
  "reason": "<string>",
  "trace_id": "<string>",
  "data": {
    "data": "<string>",
    "contract_address": "<string>",
    "timestamp": 123
  }
}

Get the data a user must sign to request a withdrawal.

Use a Broker API Key and pass the target user’s wallet in X-User-Wallet-Address. The gateway checks that the wallet belongs to your Broker. See Broker API Key and signing.

​

Usage notes

• address is the user’s bound signing wallet and the withdrawal destination. to_address is optional; if provided, it must equal address. This platform API does not support third-party withdrawal destinations.
• For EVM, response data is hex-encoded EIP-712 TypedData for wallet signing, not onchain transaction data. Do not broadcast it to contract_address.
• timestamp is a Unix timestamp in milliseconds. After signing, pass the signature components and the unchanged timestamp to Submit a withdrawal.

Authorizations

KEY · string · header · required

Broker API Key

Timestamp · string · header · required

Unix timestamp in seconds

SIGN · string · header · required

Hexadecimal HMAC-SHA512 signature generated with the Broker Secret Key

Headers

X-User-Wallet-Address · string · required

Target user's wallet address. The gateway verifies that the user belongs to the current Broker.

Body

application/json

chain · enum<string> · required

Network identifier: base, bsc, ethereum, solana, or arbitrum.

Available options: base, bsc, ethereum, solana, arbitrum

Example:

"ethereum"

token_symbol · string · required

Token symbol

token_address · string · required

Token contract

token_amount · string · required

Withdrawal amount as a decimal string

address · string · required

Bound user wallet that signs the request; must match X-User-Wallet-Address

to_address · string

Optional. If provided, it must equal the bound signing wallet address; third-party withdrawal destinations are not supported.

Response

200

application/json

Successful

code · integer

Business code; 0 indicates success

Example:

0

message · string

Human-readable message; success responses use success

Example:

"success"

reason · string

Error reason identifier; usually empty on success

trace_id · string

Trace ID to provide when requesting support

data · object

Show child attributes