> For the complete documentation index, see [llms.txt](https://eric-lo.gitbook.io/hyperledger-fabric/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eric-lo.gitbook.io/hyperledger-fabric/invoke-the-smart-contract.md).

# Invoke the Smart Contract

## Invoke your smart contract

### Issue an insurance 

Assume you are in Smart Insurance,  you want to open a new insurance for your client Oscar for his goods with serial number '121214'.

In terminal 3

```bash
peer chaincode invoke -o node-1:7050 \
--name ${USER}-chaincode --channelID ${USER}-channel \
-c '{"Args":["issue", "Oscar", "SmartInsurace", "121214", "000001"]}' \
--peerAddresses node-1:7051 \
--peerAddresses node-2:7051 \
--peerAddresses node-3:7051
```

You should see the following output

```
2021-02-17 11:04:22.768 HKT [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 075 Chaincode invoke successful. result: status:200 
```

### Report to the insurance

Now, assume Oscar's good with the serial number '121214' is broken in an accident and reported to the police.  Now you are Jack, a user from the police, and want to confirm Oscar's lost.

In terminal 2, 

```bash
peer chaincode invoke -o node-1:7050 \
--name ${USER}-chaincode --channelID ${USER}-channel \
-c '{"Args":["report", "121214", "000001"]}' \
--peerAddresses node-1:7051 \
--peerAddresses node-2:7051 \
--peerAddresses node-3:7051
```

### Refund for the insurance

Finally, Oscar reports his loss to Smart Insurance. Now you are Tom, the user from Smart Insurance, and announce that you going to compensate for Oscar's lost.

In terminal 3,

```bash
peer chaincode invoke -o node-1:7050 \
--name ${USER}-chaincode --channelID ${USER}-channel \
-c '{"Args":["refund", "121214", "000001"]}' \
--peerAddresses node-1:7051 \
--peerAddresses node-2:7051 \
--peerAddresses node-3:7051
```

###