web3_sha3

Returns Keccak-256 (not the standardized SHA3-256) of the given data on Optimism Layer 2.

Parameters

1. Data - DATA
   • Data to compute the hash of

Implementation Examples

cURL

curl -X POST https://api-optimism-mainnet-archive.n.dwellir.com/YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "web3_sha3",
    "params": ["0x68656c6c6f20776f726c64"],
    "id": 1
  }'

JavaScript

// Calculate hash of "hello world"
const response = await fetch('https://api-optimism-mainnet-archive.n.dwellir.com/YOUR_API_KEY', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'web3_sha3',
    params: ["0x68656c6c6f20776f726c64"], // "hello world" in hex
    id: 1
  })
});

const data = await response.json();
console.log('Keccak-256 hash:', data.result);

Response Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad"
}

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