Helius Labs and Solana Labs have introduced “Confidential Balances,”a suite of cryptographically powered token extensions designed to enable private token transfers without sacrificing institutional compliance. Announced by the Solana Developers account on X on April 8 as “the first ZK-powered encrypted token standard built for institutional compliance without sacrificing sub-second finality,” this new feature set aims to bolster Solana’s reputation as a hub for both innovative consumer-facing applications and enterprise-level use cases.
Helius, the Solana infrastructure provider behind these developments, released a detailed blog post explaining that Confidential Balances is the expanded form of what was originally referred to as “Confidential Transfers” under the Token2022 program. In that earlier iteration, issuers could mask token amounts through homomorphic encryption and zero-knowledge proofs, preserving confidentiality while still confirming transaction validity.
Solana Launches Confidential Balances
According to the Helius Labs blog, “Today, that functionality has expanded into a more comprehensive set of extensions under the term Confidential Balances, adding new layers of confidentiality for asset owners and token issuers without sacrificing regulatory compliance.”
Developers can now access not just the ability to obscure token transfer amounts, but also shield fee deductions and conceal mint and burn operations. The blog post further describes how these features rely on cryptographic primitives, including ElGamal encryption and ZK proofs, to safeguard information while retaining the sub-second finality Solana is known for. The official text emphasizes that, “Rather than ‘privacy,’ we use the term confidentiality—a more accurate way to describe this technology,” clarifying that the goal is to allow certain transactions to remain hidden from public view, even as they can be verifiably processed on-chain.
The Confidential Balances announcement underscores that developers can already implement these confidential token flows in server-side Rust environments or through Wallets-as-a-Service integrations for custodial solutions. While user-facing wallets have yet to natively incorporate these features, the team projects that JavaScript-based ZK proof libraries will emerge later in 2025. At that juncture, front-end wallets will likely manage encryption keys, generate proofs on the fly, and open the door to widespread adoption. As stated by Helius, “Once these land (expected later in 2025), developers can build user-friendly browser or mobile wallet integrations that generate and validate these proofs on the fly.”
Confidential Balances also allow for “partial confidentiality,” meaning projects can determine whether to obscure specific token amounts or simply mask discrete segments of their on-chain activity. This granular approach could spur real-world use cases like secure payroll systems, B2B payments, or consumer-focused decentralized applications that require some level of confidentiality while maintaining regulatory safeguards. In line with those compliance considerations, Solana’s announcement explains that users can utilize “Auditor Keys” to ensure oversight if needed, giving institutions the confidence to explore private transactions without running afoul of legal standards.
In addition to the new cryptographic framework, the development timeline looks to integrate advanced tooling for JavaScript-based ZK proofs, thereby enabling everyday users to engage with confidential tokens in familiar web or mobile environments. When that milestone arrives, wallet providers like Phantom or Backpack could incorporate ephemeral proof generation, making it possible to discreetly handle balances with minimal disruption to the standard user experience. As Helius Labs puts it, “Phantom, Backpack, or other wallets could incorporate ephemeral proof generation, letting users discreetly send tokens with minimal fuss.”
At press time, SOL traded at $103.81.
