SaltyLib.sol

SaltyLib

Library for computing create2 salts and addresses for proxies deployed by DelegateCallProxyManager. Because the proxy factory is meant to be used by multiple contracts, we use a salt derivation pattern that includes the address of the contract that requested the proxy deployment, a salt provided by that contract and the implementation ID used (for many-to-one proxies only).

Functions:

• deriveManyToOneSalt(address originator, bytes32 implementationID, bytes32 suppliedSalt)

• deriveOneToOneSalt(address originator, bytes32 suppliedSalt)

• computeProxyAddressOneToOne(address deployer, address originator, bytes32 suppliedSalt)

• computeProxyAddressManyToOne(address deployer, address originator, bytes32 implementationID, bytes32 suppliedSalt)

• computeHolderAddressManyToOne(address deployer, bytes32 implementationID)

deriveManyToOneSalt

function deriveManyToOneSalt(address originator, bytes32 implementationID, bytes32 suppliedSalt) returns (bytes32)

Derives the create2 salt for a many-to-one proxy. Many different contracts in the Indexed framework may use the same implementation contract, and they all use the same init code, so we derive the actual create2 salt from a combination of the implementation ID, the address of the account requesting deployment and the user-supplied salt.

Parameters:

• originator: Address of the account requesting deployment.

• implementationID: The identifier for the contract implementation.

• suppliedSalt: Salt provided by the account requesting deployment.

deriveOneToOneSalt

function deriveOneToOneSalt(address originator, bytes32 suppliedSalt) returns (bytes32)

Derives the create2 salt for a one-to-one proxy.

Parameters:

• originator: Address of the account requesting deployment.

• suppliedSalt: Salt provided by the account requesting deployment.

computeProxyAddressOneToOne

function computeProxyAddressOneToOne(address deployer, address originator, bytes32 suppliedSalt) returns (address)

Computes the create2 address for a one-to-one proxy deployed by deployer (the factory) when requested by originator using suppliedSalt.

Parameters:

• deployer: Address of the proxy factory.

• originator: Address of the account requesting deployment.

• suppliedSalt: Salt provided by the account requesting deployment.

computeProxyAddressManyToOne

function computeProxyAddressManyToOne(address deployer, address originator, bytes32 implementationID, bytes32 suppliedSalt) returns (address)

Computes the create2 address for a many-to-one proxy for the implementation implementationID deployed by deployer (the factory) when requested by originator using suppliedSalt.

Parameters:

• deployer: Address of the proxy factory.

• originator: Address of the account requesting deployment.

• implementationID: The identifier for the contract implementation.

• suppliedSalt: Salt provided by the account requesting deployment.

computeHolderAddressManyToOne

function computeHolderAddressManyToOne(address deployer, bytes32 implementationID) returns (address)

Computes the create2 address of the implementation holder for implementationID.

Parameters:

• deployer: Address of the proxy factory.

• implementationID: The identifier for the contract implementation.