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
cows
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README.md
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README.md
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- `updateWrappedDID` / `updateWrappedDIDByHash` — change the wrapped DID
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- `updateController` / `updateControllerByHash` — transfer control to a new address
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If the cow has not been registered on-chain yet, `updateWrappedDID` and `updateController` will register it automatically in the same transaction.
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If the did:cow ID has not been registered on-chain yet, `updateWrappedDID` and `updateController` will register it automatically in the same transaction.
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### 6.4 Deactivate
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Call `deactivate(initial_controller_address, initial_wrapped_did)` from the current controller to permanently deactivate a did:cow ID. If the cow has not been registered on-chain yet, it will be registered automatically in the same transaction.
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Call `deactivate(initial_controller_address, initial_wrapped_did)` from the current controller to permanently deactivate a did:cow ID. If the did:cow ID has not been registered on-chain yet, it will be registered automatically in the same transaction.
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After deactivation, `resolveCow` returns an empty string and the DID cannot be reactivated.
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Deployed on Sepolia testnet: [`0x8bd78c8CdCcF951169bbF964A0aCC241Be63B05f`](https://sepolia.etherscan.io/address/0x8bd78c8CdCcF951169bbF964A0aCC241Be63B05f)
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**Contract functions (`CowRegistry.sol`):**
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- `calculateCowHash(controller, wrappedDID)` — derive the registry key for a cow
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- `calculateCowHash(controller, wrappedDID)` — derive the registry key for a did:cow ID
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- `resolveCow(controller, wrappedDID)` — return current controller and wrapped DID without needing to pre-compute the hash
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- `initializeCow(controller, wrappedDID)` — optionally pre-register before first update
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- `updateWrappedDID(controller, wrappedDID, newWrappedDID)` — update wrapped DID, registering if needed