Most developers should use the TypeScript SDK instead. The on-chain reference is for advanced use cases or when building in languages without SDK support.
Need the contract addresses? See Contract Addresses & Helpers for package addresses and common helper functions.
When to Use On-Chain Transactions
Building transactions directly (instead of using the SDK) is useful when:- Language support: You’re building in a language without an official SDK (e.g., Python, Go, Java)
- Low-level control: You need precise control over transaction construction
- High-frequency trading: You’re optimizing for minimal latency
- Custom integrations: You’re building infrastructure that requires direct blockchain interaction
Transaction Categories
All Decibel transactions are executed on-chain on the Aptos blockchain through Move smart contract function calls.Account Management
Create Trading Accounts, deposit/withdraw collateral, delegate trading, and manage account settings
Order Management
Place, cancel, and manage trading orders including limit, market, TWAP, and bulk orders
Position Management
Manage take-profit and stop-loss orders for positions
Builder Fee
Approve and manage builder fees for Trading Accounts
Vault Operations
Create, fund, and manage trading vaults
Getting Started
You’ll need a Node API token to submit transactions to the Aptos fullnode, regardless of language.
- Get the contract addresses and helper functions
- Review Optimized Transaction Building for performance best practices
- Understand price and size formatting for order parameters
- Explore the specific transaction type you need