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Ethers Wrap Example

This documentation demonstrates the use of PolywrapClient to interact with the Ethereum network. The objective is to retrieve balance in Wei and Eth, and to sign typed data.

Setup and Dependencies

First, we import the required libraries and modules:

from polywrap import (
    Uri,
    PolywrapClient,
    PolywrapClientConfigBuilder,
    ethereum_wallet_plugin,
    Connections,
    Connection,
    sys_bundle
)
import json

Wrap URIs Initialization

Here, we define the URIs for ethers core and utility wraps:

ethers_core_uri = Uri.from_str("wrapscan.io/polywrap/[email protected]")
ethers_util_uri = Uri.from_str("wrapscan.io/polywrap/[email protected]")

Configuring the Polywrap Client

For interacting with the Ethereum network, we configure the PolywrapClient:

builder = PolywrapClientConfigBuilder()
builder.add_bundle(sys_bundle)

mainnet_connection = Connection.from_node(
    "https://mainnet.infura.io/v3/f1f688077be642c190ac9b28769daecf",
    "0x4f3edf983ac636a65a842ce7c78d9aa706d3b113bce9c46f30d7d21715b23b1d"  # Caution: Private key
)
connections = Connections({
    "mainnet": mainnet_connection,
}, default_network="mainnet")

wallet_plugin = ethereum_wallet_plugin(connections)
builder.set_package(Uri.from_str("wrapscan.io/polywrap/[email protected]"), wallet_plugin)
config = builder.build()
client = PolywrapClient(config)

Fetching Balance

Retrieve the balance in both Wei and Eth:

balance = client.invoke(
    uri=ethers_core_uri,
    method="getBalance",
    args={"address": "0x00000000219ab540356cbb839cbe05303d7705fa"}
)
print(f"Balance in Wei: {balance}")
assert int(balance) > 0

balance_in_eth = client.invoke(
    uri=ethers_util_uri,
    method="toEth",
    args={"wei": balance}
)
print(f"Balance in Eth: {balance_in_eth}")

Signing Typed Data

To sign typed data, we define domain data, message, and types:

domain_data = {
    "name": "Ether Mail",
    "version": "1",
    "chainId": 1,
    "verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
}
message = {
    "from": {"name": "Cow", "wallet": "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826"},
    "to": {"name": "Bob", "wallet": "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB"},
    "contents": "Hello, Bob!"
}
types = {
    "EIP712Domain": [
        {"type": "string", "name": "name"},
        {"type": "string", "name": "version"},
        {"type": "uint256", "name": "chainId"},
        {"type": "address", "name": "verifyingContract"}
    ],
    "Person": [
        {"name": "name", "type": "string"},
        {"name": "wallet", "type": "address"}
    ],
    "Mail": [
        {"name": "from", "type": "Person"},
        {"name": "to", "type": "Person"},
        {"name": "contents", "type": "string"}
    ]
}

payload = json.dumps({
    "domain": domain_data,
    "types": types,
    "primaryType": "Mail",
    "message": message
})

sign_typed_data_result = client.invoke(
    uri=ethers_core_uri,
    method="signTypedData",
    args={"payload": payload}
)

print(f"Signed typed data: {sign_typed_data_result}")
assert sign_typed_data_result == "0x12bdd486cb42c3b3c414bb04253acfe7d402559e7637562987af6bd78508f38623c1cc09880613762cc913d49fd7d3c091be974c0dee83fb233300b6b58727311c"

Conclusion

This example demonstrates how to use the PolywrapClient to interact with the Ethereum Network. For more information on the PolywrapClient, please refer to the Polywrap Python Client documentation.