web3_sha3

Compute the Keccak-256 hash of the input data.

• Source: framework/src/main/java/org/tron/core/services/jsonrpc/TronJsonRpcImpl.java#web3Sha3
• Ports: FullNode 8545 / Solidity 8555

Request parameters

Position	Type	Required	Description
params[0]	string	yes	Bytes to hash, hex-encoded (with or without 0x prefix)

Example request:

# Example: Keccak-256 of the ASCII string "hello"
curl -X POST https://nile.trongrid.io/jsonrpc \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"web3_sha3","params":["0x68656c6c6f"],"id":1}'

Response

0x-prefixed 32-byte hex (i.e. Keccak-256, matching EVM KECCAK256; not SHA3-256).

The example below is the real response captured from the Nile testnet curl above (keccak256("hello") = 1c8aff95...deac8):

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8"
}

Error responses

Trigger	Code	message
params[0] is not a valid hex	-32602	invalid input value

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