Ethereum bank stack financial infrastructure is being rebuilt.

Banks are not debating whether blockchain is important, but rather deciding what architecture to adopt for settlement, liquidity management, and balance sheets. The pressure comes from structural factors: decentralized payment channels, rising compliance costs, security risks, and the characteristics of instant global settlement of on-chain funds.

ZKsync

Phylax is grandly launching Bank Stack: a full-stack architecture based on Ethereum and powered by the following technologies: Prividium, which has institutional safeguards that can be enforced in production environments. Ethereum is the foundation of trust. Prividium is the private execution layer. Phylax adds deterministic controls to ensure the operational security of the instant settlement system.

Bank Stack is not a product, but a systemic architecture for on-chain finance.

It consists of three integrated planes:

  • Blockchain platform: Ethereum + Prividium for private execution, compliance primitives, and interoperability

  • Currency and assets: Tokenized deposits, stablecoins, and RWAs natively issued on Prividium

  • Services and governance: Identity verification, custody, policy execution, circuit breakers, reporting, and operational controls

⛓️ Blockchain platform

Prividium as the institutional trading layer

Its foundation is Prividium: a private, compliant, zero-knowledge proof-based blockchain anchored on Ethereum.

Prividium enables institutions to inherit Ethereum's security, settlement guarantees, and global interoperability while operating in a confidential trading environment. The execution process and data remain private; the concise zero-knowledge proofs published to Ethereum ensure the integrity and finality of transactions.

This will unlock the following:

  • Private execution without public data leakage

  • Finality and cryptographic integrity based on Ethereum

  • Institutional throughput and predictable performance

  • Rapid deployment without the need for custom infrastructure rebuilding

Native compliance and policy primitives

Prividium embeds compliance readiness at the infrastructure level:

  • Permissioned participation through institutional identity and access control

  • KYC/AML execution implemented directly in asset and workflow logic

  • Audit and reporting capabilities are inherent attributes of the system, not additional monitoring features.

This transforms compliance from an 'operational burden' to an 'architectural guarantee.'

Native interoperability

Institutional networks cannot be islands. ZKsync's L1 interoperability solution allows any ZK Chain to natively connect to Ethereum without sacrificing its governance, privacy, or execution environment. Prividium becomes the first architecture where institutions can access private systems and seamlessly connect to public market liquidity.

Ethereum, Prividium, and Bank Stack

Ethereum provides global settlement services. Prividium offers private institutional-grade trading services. Phylax provides deterministic security controls and, when necessary, enforceable guarantees.

They collectively unlock:

  • Instant settlement of institutional funds

  • Private execution with publicly verifiable outcomes

  • Native issuance of institutional currencies and assets

  • Interoperable liquidity across institutional networks

  • Operational controls to limit worst-case losses and generate evidence for institutional oversight

The Bank Stack represents the transition from fragmented infrastructure to shared programmable finance built on Ethereum, privately executed on Prividium, and operated with production-grade security measures.

At ZKsync and Phylax, we believe this architecture will define the next era of institutional finance, and we are working towards this future today.