Feat/add python examples

README.md

@@ -2,10 +2,11 @@
 
 ![Era Logo](https://github.com/matter-labs/era-contracts/raw/main/eraLogo.svg)
 
-Examples on how to interact with zkSync Era network using SDKs for different languages.
+Examples on how to interact with zkSync Era network using different SDKs.
 
-- [Go examples](go)
-- [JavaScript examples](js)
+- [Go](go)
+- [JavaScript](js)
+- [Python](python)
 
 ## 🤝 Contributing
 

go/17_deploy_create_account.go

@@ -15,7 +15,7 @@ func main() {
 	var (
 		PrivateKey        = os.Getenv("PRIVATE_KEY")
 		ZkSyncEraProvider = "https://sepolia.era.zksync.dev"
-		TokenAddress      = "0x765F5AF819D818a8e8ee6ff63D8d0e8056DBE150" // Crown token which can be minted for free
+		TokenAddress      = "0xA70dF8446A6AeA0017D60e97e816e141aa28759b" // Crown token which can be minted for free
 	)
 
 	// Connect to zkSync network

go/18_deploy_create2_account.go

@@ -15,7 +15,7 @@ func main() {
 	var (
 		PrivateKey        = os.Getenv("PRIVATE_KEY")
 		ZkSyncEraProvider = "https://sepolia.era.zksync.dev"
-		TokenAddress      = "0x765F5AF819D818a8e8ee6ff63D8d0e8056DBE150" // Crown token which can be minted for free
+		TokenAddress      = "0xA70dF8446A6AeA0017D60e97e816e141aa28759b" // Crown token which can be minted for free
 	)
 
 	// Connect to zkSync network

go/19_use_paymaster.go

@@ -24,7 +24,7 @@ func main() {
 	var (
 		PrivateKey        = os.Getenv("PRIVATE_KEY")
 		ZkSyncEraProvider = "https://sepolia.era.zksync.dev"
-		TokenAddress      = common.HexToAddress("0x765F5AF819D818a8e8ee6ff63D8d0e8056DBE150") // Crown token which can be minted for free
+		TokenAddress      = common.HexToAddress("0xA70dF8446A6AeA0017D60e97e816e141aa28759b") // Crown token which can be minted for free
 		PaymasterAddress  = common.HexToAddress("0x57F48f0d845E0ed7C9Bf066cEbFF64FbeBE6AFEF") // Paymaster for Crown token
 	)
 

js/src/17_deploy_create_account.ts

@@ -4,7 +4,7 @@ const provider = Provider.getDefaultProvider(types.Network.Sepolia);
 const PRIVATE_KEY = process.env.PRIVATE_KEY;
 const wallet = new Wallet(PRIVATE_KEY, provider);
 
-const tokenAddress = "0x765F5AF819D818a8e8ee6ff63D8d0e8056DBE150";
+const tokenAddress = "0xA70dF8446A6AeA0017D60e97e816e141aa28759b";
 
 async function main() {
     const conf = require("../../solidity/custom_paymaster/paymaster/build/Paymaster.json");

js/src/18_deploy_create2_account.ts

@@ -5,7 +5,7 @@ const provider = Provider.getDefaultProvider(types.Network.Sepolia);
 const PRIVATE_KEY = process.env.PRIVATE_KEY;
 const wallet = new Wallet(PRIVATE_KEY, provider);
 
-const tokenAddress = "0x765F5AF819D818a8e8ee6ff63D8d0e8056DBE150";
+const tokenAddress = "0xA70dF8446A6AeA0017D60e97e816e141aa28759b";
 
 async function main() {
     const conf = require("../../solidity/custom_paymaster/paymaster/build/Paymaster.json");

js/src/19_use_paymaster.ts

@@ -6,7 +6,7 @@ const ethProvider = ethers.getDefaultProvider("sepolia");
 const PRIVATE_KEY = process.env.PRIVATE_KEY;
 const wallet = new Wallet(PRIVATE_KEY, provider, ethProvider);
 
-const tokenAddress = "0x765F5AF819D818a8e8ee6ff63D8d0e8056DBE150"; // Crown token which can be minted for free
+const tokenAddress = "0xA70dF8446A6AeA0017D60e97e816e141aa28759b"; // Crown token which can be minted for free
 const paymasterAddress = "0x57F48f0d845E0ed7C9Bf066cEbFF64FbeBE6AFEF"; // Paymaster for Crown token
 const token = new ethers.Interface(
     require("../../solidity/custom_paymaster/token/build/Token.json").abi,

python/.gitignore

@@ -0,0 +1,160 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+.idea/

python/01_deposit.py

@@ -0,0 +1,51 @@
+import os
+
+from eth_account import Account
+from eth_account.signers.local import LocalAccount
+from eth_typing import HexStr
+from web3 import Web3
+
+from zksync2.account.wallet import Wallet
+from zksync2.core.types import Token, DepositTransaction
+from zksync2.manage_contracts.utils import zksync_abi_default
+from zksync2.module.module_builder import ZkSyncBuilder
+
+if __name__ == "__main__":
+    # Get the private key from OS environment variables
+    PRIVATE_KEY = bytes.fromhex(os.environ.get("PRIVATE_KEY"))
+
+    # Set a provider
+    ZKSYNC_PROVIDER = "https://sepolia.era.zksync.dev"
+    ETH_PROVIDER = "https://rpc.ankr.com/eth_sepolia"
+
+    # Connect to zkSync network
+    zk_web3 = ZkSyncBuilder.build(ZKSYNC_PROVIDER)
+
+    # Connect to Ethereum network
+    eth_web3 = Web3(Web3.HTTPProvider(ETH_PROVIDER))
+
+    # Get account object by providing from private key
+    account: LocalAccount = Account.from_key(PRIVATE_KEY)
+
+    # Create Ethereum provider
+    wallet = Wallet(zk_web3, eth_web3, account)
+
+    #ZkSync contract
+    zksync_contract = eth_web3.eth.contract(Web3.to_checksum_address(zk_web3.zksync.main_contract_address),
+                                                 abi=zksync_abi_default())
+
+    amount = 0.1
+    l2_balance_before = wallet.get_balance()
+
+    tx_hash = wallet.deposit(DepositTransaction(token=Token.create_eth().l1_address,
+                                                     amount=Web3.to_wei(amount, "ether"),
+                                                     to=wallet.address))
+
+    l1_tx_receipt = eth_web3.eth.wait_for_transaction_receipt(tx_hash)
+    l2_hash = zk_web3.zksync.get_l2_hash_from_priority_op(l1_tx_receipt, zksync_contract)
+    l2_tx_receipt = zk_web3.zksync.wait_for_transaction_receipt(transaction_hash=l2_hash,
+                                                    timeout=360,
+                                                    poll_latency=10)
+
+    print(f"L1 transaction: {l1_tx_receipt}")
+    print(f"L2 transaction: {l2_tx_receipt}")

python/02_transfer.py

@@ -0,0 +1,47 @@
+import os
+
+from eth_account import Account
+from eth_account.signers.local import LocalAccount
+from eth_typing import HexStr
+from web3 import Web3
+
+from zksync2.account.wallet import Wallet
+from zksync2.core.types import TransferTransaction
+from zksync2.module.module_builder import ZkSyncBuilder
+
+if __name__ == "__main__":
+
+    # Get the private key from OS environment variables
+    PRIVATE_KEY = bytes.fromhex(os.environ.get("PRIVATE_KEY"))
+
+    # Set a provider
+    ZKSYNC_PROVIDER = "https://sepolia.era.zksync.dev"
+    ETH_PROVIDER = "https://rpc.ankr.com/eth_sepolia"
+
+    # Connect to zkSync network
+    zk_web3 = ZkSyncBuilder.build(ZKSYNC_PROVIDER)
+
+    # Connect to Ethereum network
+    eth_web3 = Web3(Web3.HTTPProvider(ETH_PROVIDER))
+
+    # Get account object by providing from private key
+    account: LocalAccount = Account.from_key(PRIVATE_KEY)
+
+    # Create Ethereum provider
+    wallet = Wallet(zk_web3, eth_web3, account)
+
+    # Show balance before ETH transfer
+    print(f"Balance before transfer : {wallet.get_l1_balance()} ETH")
+
+    # Perform the ETH transfer
+    tx_hash = wallet.transfer(TransferTransaction(
+        to=HexStr("0x81E9D85b65E9CC8618D85A1110e4b1DF63fA30d9"),
+        amount=Web3.to_wei(0.001, "ether"),
+
+    ))
+    zk_web3.zksync.wait_for_transaction_receipt(
+        tx_hash, timeout=240, poll_latency=0.5
+    )
+
+    # Show balance after ETH transfer
+    print(f"Balance after transfer : {wallet.get_balance()} ETH")