注意: このページはまだ日本語に翻訳されていません。以下は英語の原文です。 
function keccak256(_data): string
Compute the cryptographic KECCAK256 hash of data. The data must be a data representation, to compute the hash of UTF-8 data use the [id}(../functions/id) function.

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Parameters

ParameterTypeDescription
_dataBytesLikeThe data to hash.

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Returns

string DataHexstring The hash of the data.

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Example

keccak256('0x');

keccak256('0x1337');

keccak256(new Uint8Array([0x13, 0x37]));

// Strings are assumed to be DataHexString, otherwise it will
// throw. To hash UTF-8 data, see the note above.
keccak256('Hello World');

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Source

crypto/keccak.ts:44