> For the complete documentation index, see [llms.txt](https://docs.iotex.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.iotex.io/blockchain/build/reference-docs/native-iotex-development/smart-contract-interactions.md).
# Smart Contract Interactions
The `iotx.Contract` class of Antenna makes it easy to interact with smart contracts on the IoTeX blockchain. When you create a new `Contract` object, just initialize it with the JSON interface (ABI) of the respective contract, and the Contract object will take care of converting all contract method calls into low-level ABI calls over RPC for you.
{% hint style="success" %}
**Need a full example**? [Check the integration test](https://github.com/iotexproject/iotex-antenna/blob/master/src/__test__/iotx.integration.test.ts#L98).
{% endhint %}
* [Compiling Solidity Code](https://docs.iotex.io/developer/sdk/account-create#compiling-solidity-code)
* [Deploying a Smart Contract](https://docs.iotex.io/developer/sdk/account-create#deploying-a-smart-contract)
* [Interacting with a Smart Contract](https://docs.iotex.io/developer/sdk/account-create#interacting-with-a-smart-contract)
### Compiling Solidity Code
Antenna SDK does not compile solidity code itself; however you can get the ABI and bytecode of your contract in one of the following options:
* **Option 1**: in Node.js, import and use the [`solc`](https://www.npmjs.com/package/solc) node package, as in the following example:
```cpp
import solc from "solc";
const solidityFileString = `
pragma solidity ^0.4.16;
contract SimpleStorage {
uint storedData;
function set(uint x) public {
storedData = x;
}
function get() public view returns (uint) {
return storedData;
}
}
`;
const contractName = ":SimpleStorage";
const output = solc.compile(solidityFileString, 1);
const abi = JSON.parse(output.contracts[contractName].interface);
const bytecode = output.contracts[contractName].bytecode;
```
* **Option 2**: on the browser side, you can use [browser-solc ](https://www.npmjs.com/package/browser-solc)package. Check out this [example from iotex-explorer](https://github.com/iotexproject/iotex-explorer/blob/master/src/shared/wallet/contract/deploy.tsx#L114).
### Deploying a Smart Contract
Once you get the ABI and bytecode from the step above, then you can deploy it by sending the deploy action to the IoTeX blockchain network.
{% tabs %}
{% tab title="Javascript" %}
```javascript
import Antenna from "iotex-antenna";
import { toRau } from "iotex-antenna/lib/account/utils";
(async () => {
const antenna = new Antenna("https://api.testnet.iotex.one");
const bytecode =
"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";
const abi = `[
{
constant: false,
inputs: [{ name: "x", type: "uint256" }],
name: "set",
outputs: [],
payable: false,
stateMutability: "nonpayable",
type: "function"
},
{
constant: true,
inputs: [],
name: "get",
outputs: [{ name: "", type: "uint256" }],
payable: false,
stateMutability: "view",
type: "function"
},
{
inputs: [{ name: "_x", type: "uint256" }],
payable: false,
stateMutability: "nonpayable",
type: "constructor"
}
]`;
const creator = antenna.iotx.accounts.privateKeyToAccount(
"73c7b4a62bf165dccf8ebdea8278db811efd5b8638e2ed9683d2d94889450426"
);
const actionHash = await antenna.iotx.deployContract({
from: creator.address,
amount: "0",
abi: abi,
data: Buffer.from(bytecode, "hex"),
gasPrice: toRau("1", "Qev"),
gasLimit: "100000"
});
})();
```
{% endtab %}
{% tab title="Go Lang" %}
```go
package main
import (
"context"
"encoding/hex"
"fmt"
"log"
"math/big"
"strings"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/iotexproject/iotex-antenna-go/account"
"github.com/iotexproject/iotex-antenna-go/iotex"
"github.com/iotexproject/iotex-proto/golang/iotexapi"
)
func main() {
conn, err := iotex.NewDefaultGRPCConn("api.testnet.iotex.one")
if err != nil {
log.Fatalf("connection error : %v", err)
}
defer conn.Close()
creator, _ := account.HexStringToAccount("73c7b4a62bf165dccf8ebdea8278db811efd5b8638e2ed9683d2d94889450426")
c := iotex.NewAuthedClient(iotexapi.NewAPIServiceClient(conn), creator)
abi, err := abi.JSON(strings.NewReader(`[{"constant":false,"inputs":[{"name":"x","type":"uint256"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_x","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"}]`))
if err != nil{
log.Fatalf("JSON error : %v", err)
}
bytecode := "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"
data, err := hex.DecodeString(bytecode)
if err != nil{
log.Fatalf("Hex Decoding error : %v", err)
}
actionHash, err := c.DeployContract(data).SetGasPrice(big.NewInt(1)).SetGasLimit(1000000).SetArgs(abi, big.NewInt(10)).Call(context.Background())
if err != nil {
log.Fatalf("deploy error: %v", err)
}
fmt.Println(actionHash)
}
```
{% endtab %}
{% endtabs %}
Once the action is broadcast, you can query it:
{% tabs %}
{% tab title="Javascript" %}
```cpp
const receipt = await antenna.iotx.getReceiptByAction({
actionHash: actionHash
});
```
{% endtab %}
{% tab title="Golang" %}
```go
action, err := wallet.Iotx.GetActions(&iotexapi.GetActionsRequest{
Lookup: &iotexapi.GetActionsRequest_ByHash{
ByHash: &iotexapi.GetActionByHashRequest{
ActionHash: actionHash,
CheckPending: true,
},
},
})
```
{% endtab %}
{% endtabs %}
Finally, once the action is minted, you can query the receipt
{% tabs %}
{% tab title="Javascript" %}
```javascript
const receipt = await antenna.iotx.getReceiptByAction({
actionHash: actionHash
});
```
{% endtab %}
{% tab title="Golang" %}
```go
receipt, err := wallet.Iotx.GetReceiptByAction(&iotexapi.GetReceiptByActionRequest{
ActionHash: actionHash,
})
```
{% endtab %}
{% endtabs %}
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.iotex.io/blockchain/build/reference-docs/native-iotex-development/smart-contract-interactions.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.