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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | 12x 48x 43x 3x 3x 22x 3x 40x 43x 43x 12x 12x 12x 12x | const createKeccakHash = require('keccak');
const keccak = bits => str => {
let msg;
if (str.slice(0, 2) === '0x') {
msg = [];
for (let i = 2, l = str.length; i < l; i += 2) {
msg.push(parseInt(str.slice(i, i + 2), 16));
}
msg = Buffer.from(msg);
} else {
msg = str;
}
const instance = createKeccakHash(`keccak${bits}`);
return `0x${instance.update(msg).digest('hex')}`;
};
export const keccak256 = keccak(256);
export const keccak512 = keccak(512);
export const keccak256s = keccak(256);
export const keccak512s = keccak(512);
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