Store and Transfer

Eventually Received

1. Register Purchase Request (Buyer → Blockchain)

• Specify conditions: date range, language, tags, etc.

• Set pricing: unit price and maximum purchase amount

• Provide buyer's public key and nonce

• Lock escrow funds

2. Apply to Provide Asset (User → Blockchain)

• Select assets matching conditions

• Register metadata on blockchain

• Issue transaction ID

3. Send Encrypted Asset (User → ProxyNode)

• Encrypt asset with buyer's public key

• ProxyNode stores data without ability to read content

• Generate transfer proof

4-5. Asset Receipt (Buyer ⟷ ProxyNode)

• Buyer requests receipt with transaction ID and signature

• ProxyNode provides encrypted asset

• Download completion proof automatically generated

6-7. Transaction Completion and Settlement (ProxyNode → Blockchain)

• Record transfer proof on blockchain

• Release escrow funds from buyer

• Permanently record transaction completion

Security Points

• Privacy Protection: ProxyNode cannot access data content

• Fraud Prevention: Transfer proof prevents "not received" fraud

• Secure Payment: Funds locked in escrow until transaction completion