SignalService

See the documentation in {ISignalService} for more details.

struct SignalProof {
  uint64 height;
  bytes proof;
}

error B_ZERO_SIGNAL()

error B_NULL_APP_ADDR()

error B_WRONG_CHAIN_ID()

modifier validApp(address app)

modifier validSignal(bytes32 signal)

modifier validChainId(uint256 srcChainId)

function init(address _addressManager) external

Initializer to be called after being deployed behind a proxy.

function sendSignal(bytes32 signal) public returns (bytes32 storageSlot)

Send a signal (message) by setting the storage slot to a value of 1.

Name	Type	Description
signal	bytes32	The signal (message) to send.

Name	Type	Description
storageSlot	bytes32	The location in storage where this signal is stored.

function isSignalSent(address app, bytes32 signal) public view returns (bool)

Verifies if a particular signal has already been sent.

Name	Type	Description
app	address	The address that initiated the signal.
signal	bytes32	The signal (message) to send.

Name	Type	Description
[0]	bool	True if the signal has been sent, otherwise false.

function isSignalReceived(uint256 srcChainId, address app, bytes32 signal, bytes proof) public view returns (bool)

Verifies if a signal has been received on the target chain.

Name	Type	Description
srcChainId	uint256	The identifier for the source chain from which the signal originated.
app	address	The address that initiated the signal.
signal	bytes32	The signal (message) to send.
proof	bytes	Merkle proof that the signal was persisted on the source chain.

Name	Type	Description
[0]	bool	True if the signal has been received, otherwise false.

function getSignalSlot(address app, bytes32 signal) public pure returns (bytes32 signalSlot)

Get the storage slot of the signal.

Name	Type	Description
app	address	The address that initiated the signal.
signal	bytes32	The signal to get the storage slot of.

Name	Type	Description
signalSlot	bytes32	The unique storage slot of the signal which is created by encoding the sender address with the signal (message).

title: ProxiedSignalService

Proxied version of the parent contract.