Connectivity

Overview

Connectivity describes how DApps (Miniapps) communicate with the KeyApp host environment and the external world.

BioBridge Protocol

The BioBridge Protocol is the communication layer between the Miniapp (running in an iframe) and the KeyApp Host.

Message Format

{
  "id": "uuid-v4",
  "method": "bio_requestAccounts",
  "params": [],
  "jsonrpc": "2.0"
}

Supported Methods (Core)

• bio_requestAccounts: Request user address list.
• bio_createTransaction: Build unsigned transaction.
• bio_signTransaction: Sign unsigned transaction.
• bio_sendTransaction: Request transfer authorization and broadcast.
• bio_destroyAsset: Request destroy authorization.

Amount Semantics Standard

• See: 02-Amount-Semantics-Standard.md
• Key rule: all transaction amount fields use raw integer string (minimum unit).

Network Access

Miniapps are sandboxed and cannot access arbitrary network endpoints. All network requests must be proxied or explicitly allowlisted in the manifest.

• CSP: Content Security Policy restricts fetch / XHR.
• Proxy: KeyApp provides a proxy service for specific API calls if needed.