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Polybase Labs
Polybase Labs builds Payy Wallet, Payy Network, Payy Card, and privacy-preserving stablecoin payment infrastructure.
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Maintainer signals as of Aug 10, 2026
Cash Links
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Description
Cash Links enables sending money through URLs that work in messaging apps or documents. Recipients explicitly claim payment links, and the product is presented for sharing money through existing communication channels, social media, campaigns, and payouts; it can be tried in Payy Wallet.Category: Payments Infrastructure
Sequencers
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Description
Sequencers is a Payy platform implementation layer between transaction submission and proof production. It manages mempool transactions, consensus-based block allocations, deterministic transaction ordering, peer broadcast and synchronization, and provides provers with a deterministic block stream. The module supports parallel sequencers, multiple blocks per allocation, and validator configuration for P2P networking, RPC, storage, proposals, and synchronization.Category: Shared Sequencer
Payy Card
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Description
Payy Card lets verified Payy Wallet users spend their stablecoin balance through Visa while retaining self-custody. Card activity routes through Payy Network to avoid exposing public onchain balances and payment history during spending. Eligible users can use virtual and physical cards, add the card to Apple Pay or Google Pay, and manage card freeze controls in the app.Category: Card
Privacy Layer
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Description
Privacy Layer is a Payy stack implementation layer and private-state engine for ERC-20 privacy pools. It represents spendable value as private notes, records commitments, nullifiers, and sparse Merkle roots rather than public balances, and lets spenders prove ownership and value conservation without revealing note contents. It also provides the privacy-pool boundary for bridge mint and burn paths.Category: Privacy Pool
ZK Circuits
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Description
ZK Circuits is a Payy platform implementation layer that defines constraints for private state transitions. Its Noir circuits cover transfers, mints, burns, UTXOs, signatures, paths, and aggregation; typed Rust interfaces keep proof bytes, public inputs, notes, Merkle paths, and aggregation data compatible with Payy’s node, PrivacyBridge, and prover components.Category: Developer Tooling
Provers
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Description
Provers is a Payy stack module that converts sequenced L2 blocks into zero-knowledge evidence for valid EVM Layer and Privacy Layer transitions. It reads transaction proofs and Smirk private-state data, aggregates UTXO proofs with Barretenberg-backed circuits, computes state roots and commitment data, and submits the final proof and verification payload to an Ethereum rollup contract.Category: Developer Tooling
Payy Network
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Description
Payy Network is the primary Rust node client for the Payy rollup. It manages transaction intake and mempool state, block construction, peer synchronization, snapshots, validator configurations, RPC access, and a contract worker that aligns the L2 client with Ethereum settlement. It serves wallets, explorers, and monitoring applications in single- or multi-validator deployments.Category: L2
Payy Wallet
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Description
Payy Wallet is a non-custodial wallet app for storing, sending, earning, and using stablecoins and crypto. It keeps the private key on the user’s device while abstracting blockchain and transaction complexity. It supports private stablecoin payments over Payy Network, including payments sent as claimable links, and can be funded from crypto exchanges or wallets.Category: Wallet
Privacy Vault
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Description
Privacy Vault is an implementation layer in the Payy stack that keeps private note metadata offchain while remaining compatible with Ethereum wallets. It uses EIP-712 wallet signatures for authentication, supplies private inputs for client-side zero-knowledge proofs, can combine public chain state with a user’s private note data in RPC responses, and supports explicitly authorized data sharing.Category: Uncategorized
PrivacyBridge
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Description
PrivacyBridge is Payy's contract-facing EVM interface to native privacy pools. It verifies privacy proofs via the Privacy Proof Verify precompile, reads and updates sparse Merkle state through the Rollup predeploy, and provides transfer, mint, burn, and sweep methods for moving assets between visible token balances and private pools.Category: Bridge