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28 lines
776 B
28 lines
776 B
const { keccak256, id, toBeHex, MaxUint256 } = require('ethers');
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const { artifacts } = require('hardhat');
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function namespaceId(contractName) {
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return `openzeppelin.storage.${contractName}`;
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}
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function namespaceLocation(value) {
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const hashIdBN = BigInt(id(value)) - 1n; // keccak256(id) - 1
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const mask = MaxUint256 - 0xffn; // ~0xff
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return BigInt(keccak256(toBeHex(hashIdBN, 32))) & mask;
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}
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function namespaceSlot(contractName, offset) {
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try {
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// Try to get the artifact paths, will throw if it doesn't exist
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artifacts._getArtifactPathSync(`${contractName}Upgradeable`);
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return offset + namespaceLocation(namespaceId(contractName));
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} catch (_) {
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return offset;
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}
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}
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module.exports = {
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namespaceSlot,
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namespaceLocation,
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namespaceId,
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};
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