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25 lines
676 B
25 lines
676 B
3 years ago
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const ImplementationLabel = 'eip1967.proxy.implementation';
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const AdminLabel = 'eip1967.proxy.admin';
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const BeaconLabel = 'eip1967.proxy.beacon';
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function labelToSlot (label) {
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return '0x' + web3.utils.toBN(web3.utils.keccak256(label)).subn(1).toString(16);
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}
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function getSlot (address, slot) {
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return web3.eth.getStorageAt(
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web3.utils.isAddress(address) ? address : address.address,
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web3.utils.isHex(slot) ? slot : labelToSlot(slot),
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);
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}
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module.exports = {
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ImplementationLabel,
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AdminLabel,
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BeaconLabel,
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ImplementationSlot: labelToSlot(ImplementationLabel),
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AdminSlot: labelToSlot(AdminLabel),
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BeaconSlot: labelToSlot(BeaconLabel),
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getSlot,
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};
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