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AVSDirectory.md

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AVSDirectory

File Type Proxy
AVSDirectory.sol Singleton Transparent proxy

The AVSDirectory handles interactions between AVSs and the EigenLayer core contracts. Once registered as an Operator in EigenLayer core (via the DelegationManager), Operators can register with one or more AVSs (via the AVS's contracts) to begin providing services to them offchain. As a part of registering with an AVS, the AVS will record this registration in the core contracts by calling into the AVSDirectory.

For more information on AVS contracts, see the middleware repo.

Currently, the only interactions between AVSs and the core contracts is to track whether Operators are currently registered for the AVS. This is handled by two methods:

In a future release, this contract will implement additional interactions that relate to (i) rewarding Operators for the services they provide and (ii) slashing Operators that misbehave. Currently, these features are not implemented.

registerOperatorToAVS

function registerOperatorToAVS(
    address operator,
    ISignatureUtils.SignatureWithSaltAndExpiry memory operatorSignature
) 
    external 
    onlyWhenNotPaused(PAUSED_OPERATOR_REGISTER_DEREGISTER_TO_AVS)

Allows the caller (an AVS) to register an operator with itself, given the provided signature is valid.

Effects:

  • Sets the operator's status to REGISTERED for the AVS

Requirements:

  • Pause status MUST NOT be set: PAUSED_OPERATOR_REGISTER_DEREGISTER_TO_AVS
  • operator MUST already be a registered Operator (via the DelegationManager)
  • operator MUST NOT already be registered with the AVS
  • operatorSignature must be a valid, unused, unexpired signature from the operator. The signature is an ECDSA signature by the operator over the OPERATOR_AVS_REGISTRATION_TYPEHASH. Expiry is a utc timestamp in seconds. Salt is used only once per signature to prevent replay attacks.

As of M2:

  • Operator registration/deregistration does not have any sort of consequences for the Operator or its shares. Eventually, this will tie into rewards for services and slashing for misbehavior.

deregisterOperatorFromAVS

function deregisterOperatorFromAVS(
    address operator
) 
    external 
    onlyWhenNotPaused(PAUSED_OPERATOR_REGISTER_DEREGISTER_TO_AVS)

Allows the caller (an AVS) to deregister an operator with itself

Effects:

  • Sets the operator's status to UNREGISTERED for the AVS

Requirements:

  • Pause status MUST NOT be set: PAUSED_OPERATOR_REGISTER_DEREGISTER_TO_AVS
  • operator MUST already be registered with the AVS

As of M2:

  • Operator registration/deregistration does not have any sort of consequences for the Operator or its shares. Eventually, this will tie into rewards for services and slashing for misbehavior.

cancelSalt

function cancelSalt(bytes32 salt) external

Allows the caller (an Operator) to cancel a signature salt before it is used to register for an AVS.

Effects:

  • Sets operatorSaltIsSpent[msg.sender][salt] to true

Requirements:

  • Salt MUST NOT already be cancelled