A private payroll splitter on Miden is an app that pays multiple recipients from one funding source while keeping the amounts and the recipient list off the public chain. On most chains a payroll contract leaks everyone's salary the moment a transaction confirms. On Miden, where every account is an independent state machine and state is private by default, you can prove that a split executed correctly without publishing who got paid or how much. That is a hard, real problem, and building it well marks you as a developer who understands zero-knowledge execution rather than someone copying an ERC-20 tutorial.
This guide is for intermediate-to-advanced builders who are comfortable with Rust and want to learn client-side proving on a chain that treats privacy as the default, not a bolt-on. It is an advanced project. Budget real time for the mental model shift.
Why Miden, and why this positions you as a developer
Miden is a zero-knowledge Layer 2 originally incubated inside Polygon. In its own words, it is a chain where accounts are independent state machines and state is private by default. Transactions are executed and proven locally by the client, then the network verifies the STARK proof instead of re-executing the work. That is what "client-side proving" means, and it is the whole reason a private payroll is even possible here.
A few facts to build on, current as of mid 2026:
- Miden raised $25M from a16z crypto, 1kx, and HackVC to build what it calls the "edge blockchain."
- The public testnet is live with a faucet, explorer, RPC endpoints, and a remote prover. Testnet v0.12 and v0.13 shipped through late 2025 and early 2026, adding a new encrypted address format, a private transport layer built with Nethermind, ECDSA signing via precompiles, and better scaffolding.
- Mainnet is targeted for 2026 but not yet live at time of writing, so treat any hard launch date as unconfirmed.
- Early mainnet uses an interim model the team calls "privacy training wheels," where clients still send transaction data plus the proof to the operator. That gives Web2-like privacy now, with stronger guarantees planned later. Build with that limitation in mind rather than overpromising.
Miden is tokenless as of this writing. No airdrop is announced or promised. Shipping a real privacy app on testnet is how you build a public, verifiable record as a developer on this chain, which is the only thing you actually control.
What to build
Scope the first version tightly:
- A funder account holds a balance of a test asset from the faucet.
- The funder defines a split: a list of recipients and amounts, held client-side.
- One operation consumes the funder's input note and produces one private output note per recipient, each spendable only by that recipient.
- The amounts and the recipient set never appear in public chain state. The network verifies a proof that inputs equal outputs and that the split was authorized.
That is the core. Later versions can add recurring runs, a shared team address via Miden Guardian, or ECDSA-based approval from an existing key.
Build path and stack
1. Install the toolchain. Use midenup to install the Miden toolchain, then create a wallet and get test assets from the testnet faucet. Prototype logic in the Playground before writing a full client.
2. Learn the note model first. Miden's accounts-and-notes design is closer to a UTXO plus smart-contract hybrid than to an account-balance ledger. Payroll maps naturally onto it: one input note funds many output notes. Read the Accounts and Notes docs and reproduce a single private transfer end to end before you attempt a split. Do not skip this step.
3. Write the logic in Rust, compile to MASM. You author accounts, notes, and transactions in Rust and compile to Miden Assembly (MASM), which runs on the STARK-based Miden VM. Your payroll note script enforces the rule that consumed input value equals the sum of created output values, and that each output note targets the intended recipient.
4. Prove on the client. Generate the STARK proof locally with the Rust SDK, or offload heavy proving to the remote prover on testnet if local proving is slow on your machine. The point is that the split executes and proves without a public contract seeing the numbers.
5. Add a front end. Use the TypeScript / Web SDK (there are Rust, Web, and React SDKs) to build a browser client where a funder pastes recipients and amounts and triggers the run. Keep all recipient data client-side.
6. Verify privacy claims honestly. Inspect the testnet explorer and confirm what is and is not visible. Document the "training wheels" caveat plainly in your README. Overstating the privacy guarantee is the fastest way to lose credibility.
Common pitfalls
- Treating Miden like an EVM chain. There is no Solidity mapping of address to balance. Model everything as notes and state machines or you will fight the platform.
- Value conservation bugs. If your note script does not strictly enforce inputs equal outputs, you either burn or mint value. Test this with adversarial inputs.
- Assuming absolute privacy today. The interim operator model means data still flows to the operator. Say so.
- Fragile local proving. Proving is compute-heavy. Use the remote prover for larger splits and measure timings.
- Chasing a date. Mainnet timing and any future incentives are unconfirmed. Build for the working testnet in front of you.
How DEPLOYR builds and ships this with you
DEPLOYR exists to make you the real onchain developer that airdrops look for, and that means a shipped, working repo, not a screenshot. We help you scope the private payroll splitter to a demoable v1, wire up the midenup toolchain, structure the Rust plus MASM note logic, get client-side proving running against testnet, and put a clean TypeScript front end on top. Then we help you ship it as a public storefront project with an honest writeup of exactly what the privacy model does and does not guarantee, so the work stands up to scrutiny.
See /build for the build path, /hackathons for events where privacy tooling stands out, and /insights for more deep guides. Ready to start? Bring this idea to the DEPLOYR store at / and we will build and ship it with you.
Airdrops are never guaranteed. No one can promise you a payout. What you can control is becoming a developer whose onchain record speaks for itself, and that is what we build with you.
Sources: Miden, Miden Docs, Build on Miden, Testnet v0.12, Miden raises $25M, Privacy Simply Scales Better.