Defi Hacks

{
  "bridge_hacks": 4,
  "by_classification": [
    {
      "count": 14,
      "lost_usd": 427884500,
      "name": "Key Compromise"
    },
    {
      "count": 8,
      "lost_usd": 250555000,
      "name": "Social Engineering"
    },
    {
      "count": 9,
      "lost_usd": 60663000,
      "name": "Input Validation"
    },
    {
      "count": 7,
      "lost_usd": 58831000,
      "name": "Frontend & Infrastructure"
    },
    {
      "count": 11,
      "lost_usd": 51234000,
      "name": "Token & Share Accounting"
    },
    {
      "count": 21,
      "lost_usd": 50131692,
      "name": "Access Control"
    },
    {
      "count": 4,
      "lost_usd": 28953000,
      "name": "Reentrancy"
    },
    {
      "count": 8,
      "lost_usd": 26021000,
      "name": "Oracle Manipulation"
    }
  ],
  "by_year": [
    {
      "count": 100,
      "lost_usd": 960892892,
      "year": 2024
    }
  ],
  "filters": {
    "chain": "ethereum",
    "classification": null,
    "year": "2024"
  },
  "hacks": 100,
  "incidents": [
    {
      "bridge": false,
      "chains": [
        "Ethereum"
      ],
      "classification": "Key Compromise",
      "date": "2024-02-09",
      "lost_usd": 290000000,
      "name": "PlayDapp",
      "returned_usd": null,
      "source": null,
      "target": "DeFi Protocol",
      "technique": "Hot Wallet Key Compromised"
    },
    {
      "bridge": false,
      "chains": [
        "Ethereum"
      ],
      "classification": "Social Engineering",
      "date": "2024-07-18",
      "lost_usd": 234900000,
      "name": "WazirX: India",
      "returned_usd": null,
      "source": null,
      "target": "CEX",
      "technique": "Signer Phishing"
    },
    {
      "bridge": false,
      "chains": [
        "Arbitrum",
        "Ethereum"
      ],
      "classification": "Input Validation",
      "date": "2024-04-19",
      "lost_usd": 44700000,
      "name": "Hedgey",
      "returned_usd": null,
      "source": null,
      "target": "DeFi Protocol",
      "technique": "Missing Input Validation"
    }
  ],
  "returned_usd": 5100000,
  "sorted_by": "amount",
  "source": "DefiLlama hacks database",
  "total_lost_usd": 960892892
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://saylorinnovations.com/api/defi/hacks?chain=ethereum&limit=5&year=2024'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://saylorinnovations.com/api/defi/hacks?chain=ethereum&limit=5&year=2024' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fsaylorinnovations.com%2Fapi%2Fdefi%2Fhacks
const res = await pay("https://saylorinnovations.com/api/defi/hacks?chain=ethereum&limit=5&year=2024");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://saylorinnovations.com/api/defi/hacks?chain=ethereum&limit=5&year=2024")
    print(res.status_code, res.text)