URL Query Parameter for Testnet Mode

[alainncls]

URL Query Parameter for Testnet Mode

Problem

Users cannot share direct links to testnet assets. Currently, the mainnet/testnet toggle state is only persisted in localStorage, making it impossible to deep-link to testnet resources or bookmark testnet views.

Scope

• Add support for a testnet URL query parameter
• Synchronize the toggle UI with this parameter
• Ensure VeraxSdk and all Graph queries (single-chain and multichain) respect the active network type

Behavior

URL	Expected State
No testnet param	Mainnet (default)
?testnet=true	Testnet
?testnet=false or any other value	Mainnet

Acceptance Criteria

• Navigating to a URL with ?testnet=true switches to testnet mode
• The UI toggle reflects the URL parameter state on initial load
• Toggling the UI updates the URL parameter (without full page reload)
• VeraxSdk instance used for queries matches the active network type
• Multichain queries (findByMultiChain, etc.) target the correct chain set
• Removing or setting testnet=false switches back to mainnet
• Shareable URLs with ?testnet=true work correctly when opened in a new session

Edge Cases

• Conflicting state: URL param takes precedence over localStorage on initial load
• Invalid param values (e.g., ?testnet=maybe) default to mainnet