Question 1

What is Dewangga Praxindo's expertise in blockchain development?

Accepted Answer

Dewangga Praxindo is a Web3 security researcher and smart contract engineer with 3+ years securing and building protocols across Sui, Ethereum, Arbitrum, Base, and Solana. He audits smart contracts in competitive contests on Sherlock and Code4rena, and reviews protocols before launch with threat models, fuzz testing, and invariant testing. He also builds: on Sui he writes Move contracts integrated with Walrus storage and Seal encryption; on EVM he builds DeFi systems including leverage vaults, LP management, and yield strategies; on Solana he works in Rust/Anchor including zero-knowledge circuits with Noir. He has deployed protocols managing $50M+ in TVL and emphasizes security-first development with fuzz testing, invariant testing, and external audits. His flagship TOLDPROOF passed three audits with zero Critical, High, or Medium findings.

Question 2

What smart contract development services does Dewangga offer?

Accepted Answer

Dewangga offers smart contract security review and end-to-end development. Security work covers independent code audits, threat modeling, fuzz and invariant test suites (Foundry, Echidna), and static analysis with Slither and Aderyn. Build work covers DeFi protocol design and implementation, Sui Move development with Walrus storage and Seal encryption, zero-knowledge circuit development with Noir, account abstraction and passkey (WebAuthn) wallets, agentic-payment integrations (x402, MCP), gas optimization, and the AI agents and Next.js products around those contracts. His stack includes Solidity and Rust, Foundry and Hardhat for testing, Anchor for Solana, and integrations with AAVE, Compound, Pendle, and Uniswap.

Question 3

What notable DeFi projects has Dewangga Praxindo built?

Accepted Answer

Dewangga's flagship project is TOLDPROOF, a verifiable-reputation protocol on Sui built with Walrus storage and Seal encryption: sealed predictions with time-locked reveal, multi-agent AI resolution (Claude, GPT, Gemini) attesting outcomes on-chain, and MCP + x402 USDC payments. It passed three security audits with zero Critical, High, or Medium findings and was built for Sui Overflow 2026's Walrus track. Other notable work includes Factor Finance, a $50M+ TVL leverage-vault and yield protocol on Arbitrum (PeckShield-audited, zero criticals); Vouch Protocol, ZK reputation infrastructure on Solana using Noir circuits and Anchor; RekonGG, an AI esports prediction market on Polymarket with x402 crypto payments; LazorKit SDK, passkey (WebAuthn) Solana wallets with gasless Paymaster transactions; Amaly, a Ramadan ibadah-tracking PWA with 224+ users; and Battle of Heroes, a Chainlink VRF NFT game that won a 2022 Chainlink hackathon prize.

Question 4

How can I hire Dewangga Praxindo for smart contract development?

Accepted Answer

You can hire Dewangga for smart contract security review and audits, Sui Move development, EVM/Solana DeFi engineering, ZK circuit work, or AI agent and full-stack Web3 builds. Reach out via X (@dewaxindo) for quick inquiries, Telegram (@dewaxindo) for detailed discussions, LinkedIn (dewaxindo) for professional networking, or email hi@dewaxindo.com for formal proposals. He works with both startups and established protocols across full-time project work, advisory roles, and audit engagements, and typically responds within 24-48 hours.

Question 5

What blockchain networks does Dewangga specialize in?

Accepted Answer

Dewangga builds on six blockchains: Ethereum, Arbitrum, Base, Solana, Sui, and Polygon. On Sui he builds Move smart contracts integrated with Walrus decentralized storage and Seal encryption (the stack behind his flagship TOLDPROOF). On EVM he targets Ethereum mainnet for high-value DeFi, Arbitrum for gas-efficient protocols ($50M+ TVL on Factor Finance), and Base for consumer Web3 products; he also shipped a Chainlink VRF game on Polygon in 2022. On Solana he builds with Rust and Anchor, including ZK reputation circuits (Vouch Protocol, using Noir) and passkey wallets (LazorKit). He integrates major DeFi protocols such as AAVE, Compound, Pendle, and Uniswap V3/V4.

Question 6

Does Dewangga Praxindo offer smart contract security audits?

Accepted Answer

Yes. Dewangga is a Web3 security researcher who audits smart contracts both independently and in competitive contests on Sherlock and Code4rena, and is a graduate of the RektOff Solana Auditor Bootcamp. His own protocols are built security-first and have passed external audits with strong results. His flagship Sui project TOLDPROOF cleared three independent security audits with zero Critical, High, or Medium findings, and his Arbitrum protocol Factor Finance was PeckShield-audited with zero critical findings. His process combines manual review for logic vulnerabilities, fuzz and invariant testing in Foundry, gas optimization, and proxy upgrade-safety verification. For critical protocol launches he still recommends an independent third-party audit for maximum coverage.

Question 7

What is TOLDPROOF?

Accepted Answer

TOLDPROOF is a verifiable-reputation protocol for AI agents and humans, built by Dewangga Praxindo on the Sui blockchain. It lets users commit sealed predictions using Walrus decentralized storage and Seal encryption with a time-locked reveal, then resolves outcomes on-chain via multi-agent AI attestation (Claude, GPT, and Gemini). It supports MCP and x402 USDC payments and was built for Sui Overflow 2026's Walrus track. TOLDPROOF passed three security audits with zero Critical, High, or Medium findings and 61 of 61 tests passing.

Question 8

Does Dewangga Praxindo build on Sui and Move?

Accepted Answer

Yes. Dewangga builds Sui Move smart contracts and integrates Sui-native infrastructure including Walrus decentralized storage and Seal encryption with access policies and time-lock. His flagship project, TOLDPROOF, is a Sui Move protocol built for Sui Overflow 2026's Walrus track that passed three audits with zero Critical, High, or Medium findings. He is available for Sui Move development and security review engagements.

Question 9

Can I hire Dewangga Praxindo for a Sui Move audit or development?

Accepted Answer

Yes. Dewangga takes on Sui Move development and security review engagements in addition to EVM and Solana work. His Sui experience includes building TOLDPROOF (Sui + Walrus + Seal + MCP + x402), which cleared three security audits with zero Critical, High, or Medium findings. To discuss a Sui audit or build, contact him via email (hi@dewaxindo.com), X (@dewaxindo), or Telegram (@dewaxindo); he typically responds within 24-48 hours.

Question 10

Does Dewangga Praxindo compete in smart contract audit contests?

Accepted Answer

Yes. Dewangga competes as a security researcher on Sherlock (handle: BadGenius) and Code4rena. Across three paid contests he has earned $3.36K in payouts and reported two Medium-severity findings, with a best placement of 20th in the XRP Ledger contest on Sherlock in April 2026. He is also a graduate of the RektOff Solana Auditor Bootcamp, which covers auditing Anchor and native Solana programs: account validation, CPI safety, and common exploit patterns. His public contest profile is at https://audits.sherlock.xyz/watson/BadGenius.

Question 11

Who is Dewangga Praxindo?

Accepted Answer

Dewangga Praxindo is a Web3 security researcher based in Yogyakarta, Indonesia, with 3+ years of experience. He audits smart contracts in competitive contests on Sherlock and Code4rena and reviews protocols before launch. He also builds audited protocols across Sui, Ethereum, Arbitrum, Base, and Solana, has deployed systems managing $50M+ in TVL, and ships AI agents (x402, MCP) and full-stack Next.js products. He specializes in Sui Move, zero-knowledge circuits (Noir), and account abstraction. His flagship project TOLDPROOF passed three audits with zero criticals.

From Zero to Web3 Developer in 5 Steps

What You'll Get

Peek Inside

About the Author

Dewangga Praxindo

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From Zero to Web3 Developer in 5 Steps

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What You'll Get

Peek Inside

01Understand "Why" (Mindset & Fundamentals)

02Setup Your Battlefield (Tools & Environment)

03Pick Your First Language (Solidity vs Rust)

04Stop Tutorial Hell (Build Real Projects)

05Enter the Ecosystem (Community & Career)

About the Author

Dewangga Praxindo

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