30 lines
1.2 KiB
JavaScript
30 lines
1.2 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var ethers_1 = require("ethers");
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function randomBytes(seed, lower, upper) {
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if (!upper) {
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upper = lower;
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}
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if (upper === 0 && upper === lower) {
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return new Uint8Array(0);
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}
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var result = ethers_1.ethers.utils.arrayify(ethers_1.ethers.utils.keccak256(ethers_1.ethers.utils.toUtf8Bytes(seed)));
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while (result.length < upper) {
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result = ethers_1.ethers.utils.concat([result, ethers_1.ethers.utils.keccak256(result)]);
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}
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var top = ethers_1.ethers.utils.arrayify(ethers_1.ethers.utils.keccak256(result));
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var percent = ((top[0] << 16) | (top[1] << 8) | top[2]) / 0x01000000;
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return result.slice(0, lower + Math.floor((upper - lower) * percent));
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}
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exports.randomBytes = randomBytes;
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function randomHexString(seed, lower, upper) {
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return ethers_1.ethers.utils.hexlify(randomBytes(seed, lower, upper));
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}
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exports.randomHexString = randomHexString;
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function randomNumber(seed, lower, upper) {
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var top = randomBytes(seed, 3);
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var percent = ((top[0] << 16) | (top[1] << 8) | top[2]) / 0x01000000;
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return lower + Math.floor((upper - lower) * percent);
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}
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exports.randomNumber = randomNumber;
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