# Testnet Beta ### Function Update The Beta Testnet introduced three major updates for the bridge: * Introduced two new roles: public operators and challengers * Supported wider transaction range: `0.001 - 3 sBTC` * Supported depositing to multiple chains: Ethereum Holesky, Plume, Monad, and more coming. **Public Operators:** Individuals and institutions can apply for the operator roles in Beta Testnet. Multiple operators can help guarantee bridge service availability, and ensure a smooth bridging experience by fronting sBTC (native BTC during mainnet) to users during withdrawal. **Challengers:** They ensure the operator's honest behavior; anyone can permissionlessly become a Challenger. If an operator tries to steal user funds, challengers can dispute the transaction directly on Bitcoin. Bitcoin will be the ultimate judge to punish malicious operators directly. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.fiammalabs.io/our-product-suite/pragmatically-trustless-bitvm-bitcoin-bridge/user-guides/testnet-beta.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.