Here the course Certificate

classDiagram
class Wallet {
    public_key
    private_key
    financial_data
    created_at
}

class Transaction {
    sender_public_key
    recipient_public_key
    amount
    description
    sign
    created_at
    do_sign(sender_private_key)
}

class Node {
    transactions
    nodes
    submit_transaction(transaction)
    add_node_address(address)
    sync()
    mine_block()
}

class Block {
    id
    data
    hash
    nonce
    created_at
}

• GET /api/node
  • get current node transactions and other node addresses
• POST /api/node/address
  • add new node address
• DELETE /api/node/transactions
  • clear node transactions
• POST /api/node/mine
  • mine block, aka sync transaction with other nodes, calculate nonce (proof of work), and create a new block to the blockchain
• GET /api/chain
  • get blockchain
• POST /api/chain
  • sync current node with other blockchain and transactions
• POST /api/wallet
  • create new wallet
• POST /api/search/wallet
  • wallet search
• POST /api/transaction
  • submit transaction to node