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Architecture


ABC WaaS Architecture

ABC WaaS is designed with three core layers so developers can integrate wallet functionality into their services immediately, even without deep blockchain expertise: Auth (Authentication) - MPC (Key Management) - Core (Execution).

This structure is responsible for the full flow from secure key handling and signing to final network broadcast.

1. Auth (Authentication): User Identification and Authorization​

The process starts by identifying who the user is.

  • Role: Identifies users in the service app (DApp) and grants temporary access to wallet functions.
  • Flow: When the service backend completes a username-based login request, the WaaS server issues an authentication token (Access Token) that proves the session.
  • Usage: The issued token acts as the starting key to activate the MPC engine in the next step.

2. MPC (Key Management): Distributed and Secure Key Environment​

This is the security layer that creates and manages blockchain keys based on authenticated tokens.

  • Role: Instead of storing a private key as a single complete secret, MPC generates and manages it as multiple distributed key shares (Key Share).
  • Flow: If the token from the Auth step is valid, the MPC engine prepares secure operations (generation/recovery/signing) using distributed key fragments.
  • Key Point: This structurally reduces key exposure risk and allows users to recover wallets safely through username authentication, even after device changes.

3. Core (Execution): Multi-Chain Transaction Delivery​

This is the execution layer that communicates with actual blockchain networks using prepared keys.

  • Role: Builds transaction data and executes signing for multiple chains, including EVM (Ethereum, Polygon, etc.) and Solana.
  • Flow: When developers submit transfer data, the Core API requests signing from the MPC layer and then broadcasts the final signed transaction to the blockchain network.
  • Key Point: Developers can complete the transfer flow with API calls only, without implementing chain-specific RPC node management or complex signing logic.

Architecture Sequence​

ABC WaaS Architecture Sequence