Pusaka

Bitcoin you can sell, borrow against and leave to your heirs, as a NEAR NFT, and NEAR itself proves what's inside.

Three things to check, in this order:

1. Proven, not claimed. Every satoshi inside is checked by NEAR's own Bitcoin light client, net of everything ever signed away. See the proof of reserves, or run node scripts/mainnet-proof.mjs to watch NEAR's mainnet light client accept the same proof.

2. Clean to buy. Before paying, a buyer sees whether anything the seller already signed could still move what's inside, on Bitcoin, every EVM chain, Solana and the NFT's NEAR account. The badges below are redrawn from the chains on every view; the same answer as JSON is an open format any NFT-wallet can adopt: proof of clean (/api/badge?id=4&contract=pusaka-btc.testnet&format=json).

3. It passes on, with no custodian. If the holder goes silent, the named heir claims the NFT and every Bitcoin in it: claimed Pusaka #2 gas-free. A will executed by attested code: an agent in a TEE claims for the heir with a key that never leaves the enclave and can only call claim_inheritance (claimed classic #2). Failure cases, each with its test: a guardian loses their key, a guardian turns hostile, the holder is alive but offline (table). Watch the next one happen during judging:

Each Pusaka is a NEAR NFT (NEP-171) with its own native Bitcoin address, signed for by the NEAR MPC network through Chain Signatures only when the current NFT owner asks. Every deposit is proven on NEAR against Bitcoin's own headers by NEAR's Bitcoin light client, and the contract subtracts every output it ever signed away: verified_sats is a number a buyer, lender, heir or AI agent can rely on with no indexer, no oracle, no wrapped BTC and no trust in us.

Live badges, redrawn from the chains on every view (BTC proven on NEAR, and whether anything the holder already signed could still move it, with the time of the check):

60 seconds, no wallet:

npm install && node scripts/verify.mjs        # every claim below, checked against NEAR, its MPC, its light client and Bitcoin
node scripts/mainnet-proof.mjs                # the same proof, accepted by NEAR's *mainnet* Bitcoin light client (free view call)

Then open https://pusaka-two.vercel.app/#/market: every Pusaka, the Bitcoin proven inside it, and what you can do now.

What it looks like (live app, 14 Nov)

Market: every Pusaka, the BTC proven inside, what you can do now	A Pusaka: BTC verified on NEAR, price vs. the BTC inside, live exit quote
Clean to buy: Bitcoin, every EVM chain, Solana, its NEAR account	Two ways to borrow: NEAR from a person, or Circle USDC from the pool
Proof trail, with deposits proven by the attested Shade Agent	For exchanges: BIP-322 proof, sats proven, clean, exchange_ready
Smart Pusaka: its own account, nBTC in and out	Proof of reserves, re-checkable from your browser
Refused: real attacks, failed on-chain	For AI agents: 61 MCP tools, x402 audits
It passes on: #27's heir can claim from 16 Nov 02:00 UTC (the TEE agent will)	Attack demo: a prompt-injected agent, refused before signing

Regenerate: node web/e2e/readme-shots.mjs [bip322-proof.json].

以上为 README 的开头部分。其余内容请阅读原文。 查看完整 README ↗