bridge

BRIDGING Operations

Operations → External Call Operations → Bridge Operations (Call Forwarder)

Execute cross-chain bridge operations through supported bridge protocols.

Supported Bridges

Bridge	ID	Description
Stargate V2	0x00	Stargate V2 bridge protocol
Across	0x0A	Across bridge protocol

BridgeIds Enum

Value	Name	Description
0x00	STARGATE_V2	Stargate V2 bridge protocol
0x0A	ACROSS	Across bridge protocol

Parameters

Offset	Length (bytes)	Description
0	1	bridgeId uint8
1	Variable	bridge-specific parameters

Encoding Example

bytes memory bridgeOp = abi.encodePacked(
    uint8(ComposerCommands.BRIDGING),
    uint8(BridgeIds.STARGATE_V2),
    // Stargate V2 specific parameters...
);

Usage Context

Important: Bridge operations can only be executed through the Call Forwarder and require a two-layer calling structure:

Example

// 1. Create the bridge operation for Call Forwarder
bytes memory bridgeOp = abi.encodePacked(
    uint8(ComposerCommands.BRIDGING),
    uint8(BridgeIds.STARGATE_V2),
    // ... bridge parameters
);

// 2. Wrap in EXT_CALL to Call Forwarder
bytes memory fullCall = abi.encodePacked(
    uint8(ComposerCommands.EXT_CALL),
    address(callForwarder),      // Call Forwarder address
    uint128(0),                  // No native value for Call Forwarder
    uint16(bridgeOp.length),     // Bridge operation length
    bridgeOp                     // Bridge operation data
);

// 3. Execute on main composer
composer.deltaCompose(fullCall);