21 lines
428 B
JavaScript
21 lines
428 B
JavaScript
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const crypto = require('crypto');
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const memo = new Map();
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const fakePeerId = (addr) => {
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const hash = crypto.createHash('sha1');
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hash.update(addr);
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return hash.digest('hex').slice(0, 20);
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};
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// not super expensive, but probably worth memoizing
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module.exports = (addr) => {
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if (memo.size >= 300000) {
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memo.clear();
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}
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if (!memo.has(addr)) {
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memo.set(addr, fakePeerId(addr));
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}
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return memo.get(addr);
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};
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