Send messages from XRPL
In addition to transferring tokens across chains, Axelar enables cross-chain communication through Axelar's General Message Passing (GMP). GMP enables developers to call any function on any other connected chain. For example, smart contracts on EVM-compatible chains, such as the XRPL EVM, can be triggered directly from the XRP Ledger (XRPL).
To send a message from one chain to another, there are some key aspects to consider:
- The destination chain must be an EVM-compatible chain, as executing messages requires a smart contract.
- The destination contract address must inherit from
AxelarExecutable
Sending a message from XRP Ledger to XRPL EVM
To send a message from the XRP Ledger (XRPL) to the XRPL EVM, a Payment
transaction is used with the following key parameters:
Amount
: Represents the value of the asset to be sent. If the message does not include an asset transfer, this can be set to 1 drop (the smallest XRP unit).Destination
: The address of the Gateway on the XRP Ledger.Memos
: Hex-encoded data required for the function call, including:- The type of call to initiate.
- The destination chain on the Axelar network.
- The contract address on the destination chain to which the message is sent.
- The payload hash, which contains the data to be sent to the destination contract. This payload must be ABI-encoded. The ethers AbiCoder can be used for encoding the payload.
See Axelar's documentation for a guide on making GMP contract calls.