I'm Diwakar — a Blockchain & Backend Engineer writing production Rust for Bitcoin, EVM, Solana and multi-chain systems where correctness and security aren't optional.
I work across the cross-chain stack, applied cryptography, zero-knowledge and distributed systems.
Crypto SDE 1 @ Garden Finance — a Bitcoin R&D studio.
I build production Rust across Garden's cross-chain stack — relayers, indexers, and secure signing infrastructure powering trust-minimized settlement over Bitcoin, EVM, and many other chains.
Lately: Munger, a cross-chain HTLC executor built to solve liquidity fragmentation — aggregating CEX, DEX and AMM routers for on-chain routing, with perps-based delta-neutral hedging, risk-aware inventory rebalancing, a policy-gated routing engine and enclave-based multichain signing over a double-entry ledger.
Mercury @ Unit Labs — your wealth, onchain.
A self-custodial brokerage for tokenized US equities on Solana: hold stablecoins, invest in stocks, ETFs and curated baskets, and spend with the card — all from one wallet you actually control. Live in beta, and Unit Labs' submission to Colosseum's Crypto World's Fair.
Open-source · github.com/21r21a33333/walletkit. One ergonomic Rust facade over alloy that lets any dapp or backend send EVM transactions safely: keys that never leave a swappable signer backend, guardrails that cannot be bypassed, and a transaction lifecycle that survives stuck txs and reorgs. A client-side facade — not a custody service — where MPC/TEE signers, relayers, bundlers, paymasters and policy engines plug in behind narrow, object-safe traits (every layer is RPC-hoistable).
Core guarantees
- 🔑 Signature-only keys — no plaintext export; env / keystore / HD → KMS / HSM / Ledger / TEE / MPC as config swaps
- 🛡️ Un-bypassable policy — deny-over-allow rules gating every signature (tx, EIP-712, EIP-191, 7702); approved is provably what's signed
- 🔁 Reliable lifecycle — authoritative nonce manager, EIP-1559 gas bumps, a stable tx handle across bumps, reorg-aware confirmation
- 🧩 Pluggable everything — signer · policy · submission · nonce · gas · state, each behind a swappable trait
Standards & protocols (implemented + roadmap)
| Area | Standards |
|---|---|
| Signing | EIP-712 · EIP-191 · EIP-2 low-s · EIP-1271 / ERC-6492 |
| Keys & gas | EIP-2335 keystores · BIP-44 HD · EIP-1559 |
| Approvals | Permit2 · EIP-2612 · EIP-3009 |
| Meta-tx & MEV | ERC-2771 · Flashbots / MEV-Share |
| Account abstraction | ERC-4337 (UserOp v0.6/0.7/0.8) · ERC-7677 paymasters · EIP-7702 · ERC-7579 modules · EIP-5792 |
| Privacy & intents | ERC-5564 / 6538 stealth · ERC-7683 cross-chain |
| Auth | RIP-7212 secp256r1 passkeys |
Integrates (never re-implements): alloy signers · AWS KMS · Ledger / Trezor · Turnkey / Fireblocks / Web3Auth (MPC/TEE) · Safe{Core} multisig · Rundler / Silius / Alto bundlers · Pimlico / Alchemy / Gelato paymasters · Regorus (Rego/OPA) & WASM policy plugins · revm / Tenderly simulation · redb / SQLite state · eRPC.
github.com/21r21a33333/veil402 · A zero-knowledge shielded UTXO pool on Solana — Noir → Groth16 (Sunspot) → Anchor — hiding amounts and recipients in the Zcash / RAILGUN / Tornado-Nova lineage.
Why 402. Agentic payments settle on public rails, so an agent that pays its way through the world publishes your business as it runs — suppliers, prices, volume, timing.
The fix: pay shielded, then prove one transaction — (value, asset, recipient) — to one chosen verifier, bound and non-replayable, revealing nothing about any other. Not an all-or-nothing viewing key, not a global auditor key. Privacy by default, auditability on demand.
- 🔏 Noir circuit, Groth16 verified on-chain via CPI; audited against Tornado Nova & RAILGUN prior art
- 🌳 Append-only commitment tree, pool-scoped nullifier PDAs, reorg-safe state
- 🤖 Agent-payment SDK + demo — roadmap
Research / active development — not audited, not for real funds.
| Area | Project | What it is |
|---|---|---|
| Privacy & ZK | veil402 | Shielded UTXO pool on Solana for the agentic-payments era — hides amounts and recipients, then proves one transaction to one chosen verifier · Noir · Groth16 · Anchor |
| openfhe-secure-maxcosine | Maximum cosine similarity over encrypted vectors — OpenFHE CKKS, multiparty, no decryption | |
| Intents & execution | solvent | Zero-inventory, protocol-agnostic intent resolver on 1inch Aqua — one non-custodial maker balance backs fills across UniswapX, CoW, Across…; displaced maker strategies stay routable or fund a price-restoration rebate, and The Compact extends it cross-chain |
| stockfront | Your AI prime broker for tokenized stocks — carry, leverage, index baskets, managed portfolios and concentrated liquidity, composed by an intent compiler: plain language → a typed 11-primitive graph → steps emitted against live chain state | |
| amm-rs | Wei-exact AMM quoting and swap-calldata construction behind one object-safe Pool trait — Uniswap V2/V3/V4, Curve, Aerodrome; every path fork-proven to settle to the exact wei |
|
| arb-router | Arbitrage detection over a live pool graph — per-chain block-consistent state, bounded path search quoted from local math, then USD-priced, ranked and served over an API | |
| Wallet & chain infra | walletkit | One Rust facade over alloy for sending EVM transactions safely — signature-only keys behind swappable backends, policy gating every signature, a lifecycle surviving stuck txs and reorgs; MPC/TEE signers, bundlers and paymasters plug in |
| btc-tee-escrow | Trustless Bitcoin escrow inside a TEE — enclave-compatible server, Bitcoin Script validation, provably-fair dispute resolution | |
| blockchain | Uniform Go clients for interacting with many different chains | |
| Products & tooling | ts-plugins- | Contract-first plugin infrastructure — Rust host, out-of-process TypeScript runtimes over protobuf socket IPC, host-managed KV, and a pluginctl CLI |
| yt-notes | Read YouTube instead of watching it — a local yt-dlp / ffmpeg / whisper pipeline, then Claude Code authors the note with real frames, mermaid diagrams and timestamp deep-links | |
| distributed-systems | GFS and MapReduce built from the papers, in Rust |
More — choose-rich · multi-chain gaming API • interview-gpt-assistant · LLM interview assistant • alerts-notifier · Rust alert monitor with phone-call escalation
A self-custodial brokerage for tokenized US equities on Solana, built with Unit Labs and live in beta. Hold stablecoins, invest in stocks, ETFs and one-token diversified baskets, and spend with the card.
A zero-inventory, protocol-agnostic intent resolver on 1inch Aqua. Solvent fills intent orders using non-custodial maker liquidity borrowed through Aqua at the instant of settlement, so one maker balance backs inventory across UniswapX, CoW, Across and more while the capital never leaves the maker's control. Displaced maker strategies either stay routable or fund a price-restoration rebate, an off-chain reservation engine handles over-commitment between winning an auction and settling, and The Compact extends the whole thing cross-chain.
Users simply specify their financial intent — "the safest way to earn yield" — and Stockfront recommends and prepares the optimal strategy, sized to their holdings, unlocking yield, leverage and liquidity from a stock portfolio. Institutional strategies onchain: carry, leverage and index exposure, each with its live rate displayed before execution. Transparent risk — health factor before and after every borrow, liquidation distance, and the named risk per strategy. Every strategy is compiled, validated against live chain state, and user-signed.
A multi-chain merchant checkout: customers pay in BTC, SOL or USDC on any major EVM, and merchants receive USDC on Initia in ~30 seconds through trustless HTLC atomic swaps — no bridges, no custodians. Idle merchant float auto-stakes into Initia DEX LP positions earning swap fees and staking rewards at once. HTLCs on four ecosystems with a per-chain watcher and executor each, a custom Initia EVM rollup, and an orderbook / solver / staking backend behind a React + InterwovenKit frontend. DeFi track, built with a teammate.