did:cow, a proposal for an ID resolution method with most of the convenience of did:plc/did:web and the robustness of a public blockchain
resolveCow return empty string for deactivated dids
+5
-2
+1
-1
cli/cow.py
+1
-1
cli/cow.py
+4
-1
src/CowRegistry.sol
+4
-1
src/CowRegistry.sol
···
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/// @dev Returns the initial values if the cow has never been registered on-chain.
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/// @param _controller The initial controller address from the did:cow identifier.
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/// @param _wrappedDID The initial wrapped DID from the did:cow identifier, without "did:".
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/// @return wrappedDID The current full wrapped DID (with "did:" prepended), or "did::" if deactivated.
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/// @return wrappedDID The current full wrapped DID (with "did:" prepended), or empty string if deactivated.
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/// @return controller The current controller address.
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function resolveCow(address _controller, string memory _wrappedDID) external view returns (string memory wrappedDID, address controller) {
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bytes32 cowHash = calculateCowHash(_controller, _wrappedDID);
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Cow storage cow = cows[cowHash];
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if (bytes(cow.wrappedDID).length == 0) {
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return (string.concat("did:", _wrappedDID), _controller);
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}
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if (keccak256(bytes(cow.wrappedDID)) == keccak256(bytes(DEACTIVATED))) {
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return ("", address(0));
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}
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return (string.concat("did:", cow.wrappedDID), cow.controller);
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}