Documentation
API
Create Transaction

Create Transaction

The following API calls create BLX transactions using HTTP POST requests. Follow the links for examples and HTTP POST request parameters specific to each call. Calls in italics are phasing-safe. Refer to Create Phasing Poll

  • Send Money
  • Set Account Information
  • Set Account Property
  • Buy Alias
  • Sell Alias
  • Delete Alias
  • Set Alias
  • Send Message
  • Cancel Order
  • Dividend Payment
  • Issue Asset
  • Place Order
  • Transfer Asset
  • DGS Delisting
  • DGS Delivery
  • DGS Feedback
  • DGS Listing
  • DGS Price Change
  • DGS Purchase
  • DGS Quantity Change
  • DGS Refund
  • Lease Balance
  • Currency Buy
  • Currency Sell
  • Currency Reserve Claim
  • Currency Reserve Increase
  • Delete Currency
  • Issue Currency
  • Publish Exchange Offer
  • Transfer Currency
  • Create Poll
  • Cast Vote
  • Approve Transaction
  • Extend Tagged Data
  • Upload Tagged Data

Create Transaction Request

The following HTTP POST parameters are common to all API calls that create transactions:

  • secretPhrase is the secret passphrase of the account (optional, but transaction neither signed nor broadcast if omitted)
  • publicKey is the public key of the account (optional if secretPhrase provided)
  • feeNQT is the fee (in NQT) for the transaction:
    • minimum 10 BLX for Issue Asset, unless singleton asset is issued, for which the fee 0.01 BLX
    • 0.2 BLX in base fee for Set Alias, with 0.02 BLX additional fee for each 32 chars of name plus URI total length, after the first 32 chars
    • [25000, 1000, 40] BLX for [3-letter, 4-letter, 5-letter] Issue Currency
    • 40 BLX for re-issue of any currency
    • 0.10 BLX for a Create Poll, including 20 options and total size of poll name plus poll description plus total option length not exceeding 320 chars. For each option above 20, an additional fee of 0.01 BLX, and for each 32 chars after 320, an additional fee of 0.02 BLX.
    • [2, 21] BLX for a [basic, required-minimum-balance] Create Phasing Poll. 0.01 BLX will be added for each option (answer) beyond 20, and 0.01 BLX for each 32 bytes of hashedSecret or linkedFullHash fields.
    • 0.01 BLX for the first 32 bytes of a unencrypted non-prunable message, 0.01 BLX for each additional 32 bytes
    • 0.02 BLX for the first 32 bytes of an encrypted non-prunable message, 0.01 BLX for each additional 32 bytes. The length is measured excluding the nonce and the 16 byte AES initialization vector.
    • 0.01 BLX for the first 1024 bytes of a prunable message, 0.01 BLX for each additional 1024 prunable bytes
    • 0.01 BLX for Set Account Info, including 32 chars, with 0.02 BLX additional fee for each 32 chars
    • 0.1 BLX for Marketplace Listing, including 32 chars of name plus description. With 0.02 BLX additional fee for each 32 chars.
    • 0.01 BLX for Marketplace Delivery, including 32 bytes of encrypted goods data (AES initialization bytes and nonce excluded). With 0.02 BLX additional fee for each 32 bytes.
    • 0.02 BLX for transactions that make use of referencedTransactionFullHash property when creating a new transaction.
    • 0.01 BLX otherwise.
  • deadline is the deadline (in minutes) for the transaction to be confirmed, 32767 minutes maximum
  • referencedTransactionFullHash creates a chained transaction, meaning that the current transaction cannot be confirmed unless the referenced transaction is also confirmed (optional)
  • broadcast is set to false to prevent broadcasting the transaction to the network (optional)

Note: An optional arbitrary message can be appended to any transaction by adding message-related parameters as in Send Message.

Note: Any phasing-safe transaction (refer to Create Transaction) can have its execution deferred either conditionally or unconditionally (refer to Create Phasing Poll).

Create Transaction Response

The following JSON response fields are common to all API calls that create transactions:

  • signatureHash (S) is a SHA-256 hash of the transaction signature
  • unsignedTransactionBytes (S) are the unsigned transaction bytes
  • transactionJSON (O) is a transaction object (refer to Get Transaction for details)
  • broadcasted (B) is true if the transaction was broadcast, false otherwise
  • requestProcessingTime (N) is the API request processing time (in millisec)
  • transactionBytes (S) are the signed transaction bytes
  • fullHash (S) is the full hash of the signed transaction
  • transaction (S) is the ID of the newly created transaction
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