21 lines
725 B
JavaScript
21 lines
725 B
JavaScript
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import { keccak256Hash } from "../utils/hash.js";
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import { assertBytes } from "../utils/bytes.js";
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import { makeHexString, bytesToHex } from "../utils/hex.js";
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import { TOPIC_BYTES_LENGTH, TOPIC_HEX_LENGTH } from "../types/index.js";
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export function makeTopic(topic) {
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if (typeof topic === 'string') {
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return makeHexString(topic, TOPIC_HEX_LENGTH);
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} else if (topic instanceof Uint8Array) {
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assertBytes(topic, TOPIC_BYTES_LENGTH);
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return bytesToHex(topic, TOPIC_HEX_LENGTH);
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}
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throw new TypeError('invalid topic');
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}
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export function makeTopicFromString(s) {
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if (typeof s !== 'string') {
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throw new TypeError('topic has to be string!');
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}
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return bytesToHex(keccak256Hash(s), TOPIC_HEX_LENGTH);
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}
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