From 52d95711a34e18cec151d1eaec157bdb4edbf096 Mon Sep 17 00:00:00 2001
From: petarTxFusion <petar@txfusion.io>
Date: Tue, 27 Aug 2024 16:35:59 +0200
Subject: [PATCH] feat(java): add `ContractDeployer`

---
 .../02.api/02.contract/00.contracts.md        | 148 ++++++++++++++++++
 1 file changed, 148 insertions(+)

diff --git a/content/40.java/02.api/02.contract/00.contracts.md b/content/40.java/02.api/02.contract/00.contracts.md
index 7ef0ec1..87a7af1 100644
--- a/content/40.java/02.api/02.contract/00.contracts.md
+++ b/content/40.java/02.api/02.contract/00.contracts.md
@@ -18,3 +18,151 @@ tags: ["web3", "blockchain", "zksync", "contracts"]
 - `INonceHolder`
 - `IZkSync`
 - `ZkSyncContract`
+
+## ContractFactory
+
+The `ContractDeployer` class is a utility class for deploying smart contracts on ZKsync,
+using `create` and `create2` methods.
+It provides methods to compute contract addresses,
+based on `EIP-1014` (create2) and extract contract addresses from transaction receipts.
+
+### `computeL2Create2Address`
+
+Compute contract address according [EIP-1014]("https://eips.ethereum.org/EIPS/eip-1014")
+
+#### Inputs
+
+| Parameter     | Type        | Description                                                 |
+|---------------| ----------- | ----------------------------------------------------------- |
+| `sender`      | Address       | The address of the transaction sender.|
+| `bytecode`    | byte[]      | The compiled contract bytecode.|
+| `constructor` | byte[] | The encoded constructor parameters.|
+| `salt`        | byte[] | A 32-byte value used for the address computation.|
+
+#### Example
+
+```java
+String result = ContractDeployer.computeL2Create2Address(new Address(credentials.getAddress()), Numeric.hexStringToByteArray(CounterContract.BINARY), new byte[]{}, salt).getValue();
+```
+
+### `computeL2CreateAddress`
+
+Computes the contract address using the create method.
+
+#### Inputs
+
+| Parameter     | Type    | Description                                                 |
+|---------------|---------| ----------------------------------------------------------- |
+| `sender`      | Address | Address of a source of a transaction.|
+| `nonce`       | BigInteger  | Deployment nonce.|
+
+#### Example
+
+```java
+INonceHolder nonceHolder = INonceHolder.load(ZkSyncAddresses.NONCE_HOLDER_ADDRESS, zksync, new ReadonlyTransactionManager(zksync, credentials.getAddress()), new DefaultGasProvider());
+BigInteger deploymentNonce = nonceHolder.getDeploymentNonce(credentials.getAddress()).send();
+String precomputedAddress = ContractDeployer.computeL2CreateAddress(new Address(credentials.getAddress()), deploymentNonce).getValue();
+```
+
+### `extractContractAddress`
+
+Extracts the deployed contract address from a transaction receipt.
+
+#### Inputs
+
+| Parameter     | Type    | Description              |
+|---------------|---------|--------------------------|
+| `receipt`      | TransactionReceipt | The transaction receipt. |
+
+#### Example
+
+```java
+String correctContractAddress = ContractDeployer.extractContractAddress(response).getValue();
+```
+
+### `hashBytecode`
+
+Generates the SHA-256 hash of the contract bytecode.
+
+#### Inputs
+
+| Parameter  | Type    | Description              |
+|------------|---------|--------------------------|
+| `bytecode` | byte[] | The compiled contract bytecode. |
+
+#### Example
+
+```java
+byte[] result = ContractDeployer.hashBytecode(Numeric.hexStringToByteArray(CounterContract.BINARY));
+```
+
+### `encodeCreate2`
+
+Encodes the create2 deployment function with empty constructor parameters.
+#### Inputs
+
+| Parameter  | Type    | Description                     |
+|------------|---------|---------------------------------|
+| `bytecode` | byte[] | The compiled contract bytecode. |
+| `calldata` | byte[] | Encoded constructor parameters. |
+| `salt`     | byte[] | 32 bytes salt.                  |
+
+#### Example
+
+```java
+byte[] salt = SecureRandom.getSeed(32);
+ContractDeployer.encodeCreate2(bytecodeBytes, calldataBytes, salt)
+```
+
+### `encodeCreate`
+
+Encode `create` deployment function of default factory contract
+
+#### Inputs
+
+| Parameter  | Type    | Description                     |
+|------------|---------|---------------------------------|
+| `bytecode` | byte[] | The compiled contract bytecode. |
+| `calldata` | byte[] | Encoded constructor parameters. |
+
+#### Example
+
+```java
+ContractDeployer.encodeCreate(bytecodeBytes, calldataBytes)
+```
+
+### `encodeCreate2Account`
+
+Encodes the create2 deployment function for a custom account with empty constructor parameters [EIP-4337]("https://eips.ethereum.org/EIPS/eip-4337").
+
+#### Inputs
+
+| Parameter  | Type    | Description                         |
+|------------|---------|-------------------------------------|
+| `bytecode` | byte[] | The compiled contract bytecode.     |
+| `calldata` | byte[] | Encoded constructor parameters.     |
+| `salt`     | byte[] | 32 bytes salt.                      |
+| `accountAbstractionVersion` | AccountAbstractionVersion | Version of the account abstraction. |
+
+#### Example
+
+```java
+ContractDeployer.encodeCreate2Account(bytecodeBytes, calldataBytes, salt, AccountAbstractionVersion.Version1)
+```
+
+### `encodeCreateAccount`
+
+Encode `create` deployment custom account function of default factory contract [EIP-4337]("https://eips.ethereum.org/EIPS/eip-4337")
+
+#### Inputs
+
+| Parameter  | Type    | Description                         |
+|------------|---------|-------------------------------------|
+| `bytecode` | byte[] | The compiled contract bytecode.     |
+| `calldata` | byte[] | Encoded constructor parameters.     |
+
+#### Example
+
+```java
+ContractDeployer.encodeCreate2Account(bytecodeBytes, calldataBytes, AccountAbstractionVersion.Version1)
+```