Stacks Raw Transactions

Use the raw transaction format to create arbitrary Stacks transactions. For simple transfers, consider using the dedicated higher-level format. See Stacks Transfers.

Fordefi can handle any Stacks transaction. While raw Stacks transactions can be used to create transfers, it is recommended to use their requests’ formats.

To invoke a call to a smart contract using the Fordefi platform, you should pass in the serialized_transaction to create in hex-encoded format.

Here’s an example:

{
  "vault_id": "432b199b-1f71-42bf-ba0b-33d512afa9de",
  "note": "string",
  "signer_type": "initiator",
  "sign_mode": "auto",
  "type": "stacks_transaction",
  "details": {
    "type": "stacks_serialized_transaction",
    "fail_on_prediction_failure": true,
    "push_mode": "auto",
    "serialized_transaction": "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",
    "chain": "stacks_mainnet",
    "skip_prediction": false
  }
}

Stacks post conditions

Post conditions in the Stacks blockchain ensure that a transaction executes only if specific asset conditions are met. Users can attach post conditions to define expected changes to their STX tokens, fungible tokens (FTs), and non-fungible tokens (NFTs). If a transaction violates any post condition, it is automatically reverted, preventing unintended asset transfers.

Each transaction can include zero or more post conditions, each specifying:

• Principal: The sender of the asset (a standard or contract address)
• Asset Name: The specific asset being tracked
• Comparator: The condition applied to the asset change
• Literal: The integer or boolean value used for comparison

Comparator Types

• Fungible Assets: Checks whether the amount of a fungible token increased, decreased, or remained the same
• Non-Fungible Assets: Checks whether an NFT was transferred

Post Condition Modes

• Allow Mode: Permits additional asset transfers beyond those specified
• Deny Mode: Blocks all asset transfers except those explicitly stated

Using the Stacks' ALLOW mode is risky, as it may permit unintended asset transfers. To mitigate this, Fordefi includes a risk notification when users create Stacks transactions with ALLOW mode enabled.

The risk is reported in the Fordefi Chrome extension, so;

Learn more: Understand Alerts and Warnings