Uniswap V3 Core Java contract wrapper

This repository contains Web3j generated smart contract wrapper code to interact with the core smart contracts for the Uniswap V3 Protocol. For the core smart contracts sources, see the uniswap-v3-core repository.

Maven

Add the JitPack to the repositories element of your project pom.xml file.

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

Add the package dependencies to the dependencies element of your project pom.xml file.

<dependencies>
 <dependency>
    <groupId>me.jclagache</groupId>
    <artifactId>v3-core</artifactId>
    <version>v1.0.1-SNAPSHOT</version>
  </dependency>
</dependencies>

Gradle

Add the JitPack to your build.gradle file (Gradle Groovy) or build.gradle.kts file (Kotlin DSL) file.

Groovy:

repositories {
    maven {
        url = uri("https://jitpack.io")
    }
}

Kotlin:

repositories {
    maven {
        url = uri("https://jitpack.io")
    }
}

Add the package dependencies to your build.gradle file (Gradle Groovy) or build.gradle.kts file (Kotlin DSL) file.

Groovy:

dependencies {
    implementation 'me.jclagache:v3-core:v1.0.1-SNAPSHOT'
}

Kotlin:

dependencies {
    implementation("me.jclagache:v3-core:v1.0.1-SNAPSHOT")
}

Usage

Refer to the Uniswap V3 Smart Contracts and Web3j documentation.

Web3j web3j = Web3j.build(new HttpService("<your_node_url>"));
TransactionManager transactionManager = new ReadonlyTransactionManager(web3j,"my_address");
//USDC/WETH 0.05 % pool
IUniswapV3PoolState contract = IUniswapV3PoolState.load("0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640", web3j, transactionManager, new DefaultGasProvider());
//Filter for swap events
EthFilter filter = new EthFilter(DefaultBlockParameterName.LATEST, DefaultBlockParameterName.LATEST, "0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640");
filter.addSingleTopic(EventEncoder.encode(IUniswapV3PoolEvents.SWAP_EVENT));
web3j.ethLogFlowable(filter).subscribe(log -> {
    List<Type> results = FunctionReturnDecoder.decode(log.getData(), IUniswapV3PoolEvents.SWAP_EVENT.getNonIndexedParameters());
    BigInteger token0Balance = ((Int256) results.get(0)).getValue();
    BigInteger token1Balance = ((Int256) results.get(1)).getValue();
    BigInteger sqrtPriceX96 = ((Uint160) results.get(2)).getValue();
    BigInteger liquidity = ((Uint128) results.get(3)).getValue();
    BigInteger tick = ((Int24) results.get(4)).getValue();
});