> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getpara.com/llms.txt
> Use this file to discover all available pages before exploring further.
# IBC Cross-Chain Transfers
> Transfer tokens between Cosmos chains using Inter-Blockchain Communication
Transfer tokens between different Cosmos chains using IBC (Inter-Blockchain Communication) with CosmJS in React Native.
## Prerequisites
## IBC Transfer
```typescript theme={null}
import { useMemo } from 'react';
import { View, Text, Button } from 'react-native';
import { useParaCosmjsProtoSigner, useParaCosmjsSignAndBroadcast } from '@getpara/react-native-wallet/cosmos';
import { SigningStargateClient, coins } from '@cosmjs/stargate';
import { MsgTransfer } from 'cosmjs-types/ibc/applications/transfer/v1/tx';
import { Height } from 'cosmjs-types/ibc/core/client/v1/client';
const RPC_URL = 'https://rpc.cosmos.directory/cosmoshub';
function IBCTransfer() {
const { protoSigner, isLoading } = useParaCosmjsProtoSigner();
const address = protoSigner?.address;
const client = useMemo(
() => protoSigner ? SigningStargateClient.connectWithSigner(RPC_URL, protoSigner) : undefined,
[protoSigner]
);
const { signAndBroadcastAsync, isPending } = useParaCosmjsSignAndBroadcast(protoSigner, client);
const sendIBCTransfer = async () => {
if (!protoSigner || !address || !client) return;
const resolvedClient = await client;
const currentHeight = await resolvedClient.getHeight();
const timeoutHeight = Height.fromPartial({
revisionNumber: 1n,
revisionHeight: BigInt(currentHeight + 1000),
});
const msgTransfer = {
typeUrl: '/ibc.applications.transfer.v1.MsgTransfer',
value: MsgTransfer.fromPartial({
sourcePort: 'transfer',
sourceChannel: 'channel-141',
token: {
denom: 'uatom',
amount: '1000000',
},
sender: address,
receiver: 'osmo1...',
timeoutHeight: timeoutHeight,
timeoutTimestamp: 0n,
}),
};
const fee = {
amount: coins(5000, 'uatom'),
gas: '250000',
};
try {
const result = await signAndBroadcastAsync({
messages: [msgTransfer],
fee,
memo: 'IBC transfer via Para',
});
console.log('IBC transfer initiated:', result.transactionHash);
} catch (error) {
console.error('IBC transfer failed:', error);
}
};
if (isLoading) return Loading...;
return (
From: {address}
);
}
```
## Next Steps