Digital Estate Planning Platform with Smart Contract Automation
What was at stake
Digital assets — from cryptocurrency wallets to social media accounts to cloud-stored documents — represent an increasingly significant portion of personal estates, yet existing estate planning tools treat them as an afterthought. The startup identified that billions of dollars in digital assets are lost annually because owners die without leaving access instructions, and existing will frameworks are not designed for assets that require private keys or multi-factor authentication. They needed a platform that bridged legal estate planning with the technical reality of digital asset custody.
How we delivered
Smart Contract Will Architecture
Designed a smart contract system on Ethereum that encodes estate distribution logic, supports multiple beneficiary configurations, and executes transfers based on verified trigger events. Implemented a multi-oracle verification system requiring consensus from independent life event verification services before any transfer executes, preventing false triggers.
Encrypted Document Vault & Key Management
Built an encrypted document storage system using IPFS for decentralized storage and AWS KMS for key management, with Shamir's Secret Sharing to split decryption keys across trusted parties. Documents are only accessible when a configurable threshold of key holders cooperate — ensuring security while preventing single points of failure.
Cross-Asset Estate Plan Builder
Developed an intuitive estate plan builder that guides users through cataloging digital assets (crypto wallets, online accounts, digital files, domain names), assigning beneficiaries, specifying transfer conditions, and recording access instructions. The system generates both on-chain smart contract configurations and traditional legal documents for jurisdictional compatibility.
Security Architecture & Audit
Implemented defense-in-depth security including hardware wallet integration for high-value crypto assets, biometric authentication, anomaly detection on account access patterns, and time-locked transfer windows that allow beneficiaries to contest unauthorized actions. Conducted three independent smart contract audits with all critical findings remediated before mainnet deployment.
Measurable impact, verified by the client
Technologies we used
“Estate planning for digital assets is an unsolved problem that affects millions of people. TPWITS helped us build a platform that $120M in assets now depends on — and not a single unauthorized transfer has occurred. The smart contract architecture they designed gives our users confidence that their digital legacy is protected.”
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