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POST
/
send-transactions
Submit Signed Transactions
curl --request POST \
  --url https://api.sandbox.brickken.com/send-transactions \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "signedTransactions": [
    "0x02f8b1018203e8843b9aca00850ba43b740082520894742d35cc6634c0532925a3b8d4c9db96c4b4d8b80b844a9059cbb000000000000000000000000456789abcdef..."
  ],
  "txId": "tx_abc123def456"
}
'
{
  "txHash": "0x1234567890abcdef...",
  "status": "pending"
}
Submits signed transactions to the blockchain. This endpoint works uniformly for all transaction types prepared using the /prepare-transactions endpoint.

​
Parameters

ParameterTypeRequiredDescription
signedTransactionsstring[]YesArray of signed transaction hex strings
txIdstringYesTransaction ID from prepare-transactions response

​
Request Body

{
  "signedTransactions": [
    "0x02f8b1018203e8843b9aca00850ba43b740082520894742d35cc6634c0532925a3b8d4c9db96c4b4d8b80b844a9059cbb000000000000000000000000456789abcdef..."
  ],
  "txId": "tx_abc123def456"
}

​
Response

​
Success Response

{
  "txHash": "0x1234567890abcdef...",
  "status": "pending"
}

​
Error Response

{
  "error": {
    "code": "INVALID_SIGNATURE",
    "message": "Transaction signature is invalid",
    "details": {
      "transactionIndex": 0,
      "expectedSigner": "0x742d35Cc6634C0532925a3b8D4C9db96c4b4d8b",
      "actualSigner": "0x..."
    }
  }
}

​
Workflow

  1. Prepare Transactions: First, call /prepare-transactions with your desired method and parameters
  2. Sign Transactions: Sign each transaction in the returned transactions array using your preferred wallet or signing method
  3. Send Transactions: Submit the signed transactions along with the txId to this endpoint

​
Supported Transaction Types

This endpoint accepts signed transactions for all methods supported by /prepare-transactions:
  • newTokenization - Create new tokenized assets
  • newSto - Create Security Token Offerings
  • newInvest - Make investments in STOs
  • claimTokens - Claim tokens from completed STOs
  • closeOffer - Close active STOs
  • mintToken - Mint additional tokens
  • whitelist - Manage address whitelist status
  • approve - Approve token spending
  • burnToken - Burn tokens
  • transferFrom - Transfer tokens (with approval)
  • transferTo - Transfer tokens from signer
  • dividendDistribution - Distribute dividends

​
Transaction Status

After submitting transactions, you can check their status using the /get-transaction-status endpoint with the returned transaction hash.

​
Security Notes

  • Always verify transaction details before signing
  • Ensure the txId matches the one received from /prepare-transactions
  • Use secure signing methods for production environments
  • Never share private keys or expose them in client-side code

Authorizations

​
x-api-key
string
header
required

Body

application/json
​
signedTransactions
string[]
required

Array of signed transaction hex strings.

Example:
[
  "0x02f8b1018203e8843b9aca00850ba43b740082520894742d35cc6634c0532925a3b8d4c9db96c4b4d8b80b844a9059cbb000000000000000000000000456789abcdef..."
]
​
txId
string
required

Transaction ID from prepare-transactions response.

Example:

"tx_abc123def456"

Response

Successful response

​
txHash
string

Transaction hash of the submitted transaction

Example:

"0x1234567890abcdef..."

​
status
string

Transaction status

Example:

"pending"