Quick Start

Get started with Koi, the programmatic Web3 application firewall.

To get started, try simulating a transaction without setting an API key.

curl -XPOST https://trykoi.com/api/v1/optimism/tx/simulate -H 'Content: application/json' -d '{
  "tx": {
    "from":"0x9eef87f4c08d8934cb2a3309df4dec5635338115",
    "to":"0x76FB31fb4af56892A25e32cFC43De717950c9278",
    "data":"0x095ea7b300000000000000000000000068b3465833fb72a70ecdf485e0e4c7bd8665fc45ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
  }
}' | jq .

You should get a response like...

{
  "stateChanges": [
    {
      "type": "erc20-approval",
      "data": {
        "owner": "0x9eEf87f4C08d8934cB2a3309dF4deC5635338115",
        "spender": "0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45",
        "amount": "115792089237316195423570985008687907853269984665640564039457584007913129639935"
      },
      "logIndex": 0,
      "contract": "0x76FB31fb4af56892A25e32cFC43De717950c9278",
      "asset": {
        "chainId": 10,
        "address": "0x76FB31fb4af56892A25e32cFC43De717950c9278",
        "name": "Aave Token",
        "symbol": "AAVE",
        "decimals": 18,
        "logoURI": "https://ethereum-optimism.github.io/data/AAVE/logo.svg",
        "extensions": {
          "optimismBridgeAddress": "0x4200000000000000000000000000000000000010"
        },
        "tokenType": "ERC20"
      },
      "summary": {
        "text": "0x9eEf87f4C08d8934cB2a3309dF4deC5635338115 approved 0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45 to spend Infinite AAVE"
      }
    }
  ],
  "relevantAddresses": [
    {
      "address": "0x9eef87f4c08d8934cb2a3309df4dec5635338115"
    },
    {
      "address": "0x76FB31fb4af56892A25e32cFC43De717950c9278"
    },
  ],
  "warnings": [],
  "gasUsed": "27338"
}