Pyo3 error occurs when trying the first example

[ChifaKing]

from agentipy import SolanaAgentKit, create_solana_tools

# Initialize with private key and optional RPC URL
agent = SolanaAgentKit(
    "your-wallet-private-key-as-base58",
    "https://api.mainnet-beta.solana.com",
    "your-openai-api-key"
)

# Create LangChain tools
tools = create_solana_tools(agent)

it is showing the error below when implementing the first example

thread '<unnamed>' panicked at /Users/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/solana-sdk-1.18.1/src/signer/keypair.rs:71:64:
called `Result::unwrap()` on an `Err` value: signature::Error { source: Some(PublicKey must be 32 bytes in length) }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Traceback (most recent call last):
  File "/Users/hanesque/Desktop/code/python/swarms/agentipy-main/test.py", line 4, in <module>
    agent = SolanaAgentKit(
            ^^^^^^^^^^^^^^^
  File "/Users/hanesque/Desktop/code/python/swarms/agentipy-main/agentipy/agent/__init__.py", line 34, in __init__
    self.wallet = Keypair.from_base58_string(private_key)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pyo3_runtime.PanicException: called `Result::unwrap()` on an `Err` value: signature::Error { source: Some(PublicKey must be 32 bytes in length) }

The private key is replaced my own private key from phantom wallet.

[tkorkmazeth]

The error you're encountering occurs because the private key provided is not in the expected Base58-encoded 64-byte format required by Solana's Keypair.from_base58_string method.

Cause

Phantom Wallet typically provides a seed phrase (mnemonic) instead of a private key. The Keypair.from_base58_string method cannot directly decode this format, which leads to the error:

calledResult::unwrap()on anErr value: signature::Error { source: Some(PublicKey must be 32 bytes in length) }

Solution

To resolve this issue, follow these steps:

1. Export the Correct Private Key

If you're using Phantom Wallet, you'll need to derive the private key from the provided seed phrase. This can be done using the Solana CLI or wallet libraries.

Using Solana CLI

Run the following command to recover your keypair:

solana-keygen recover 'prompt://?key=0/0' > my-keypair.json

his will generate a JSON file (my-keypair.json) containing your keypair.

2. Convert the Keypair to Base58 Format

The my-keypair.json file contains a 64-integer array representing the private key and public key. You need to encode it in Base58 format. Here's an example in Python:

import base58
import json

# Load the keypair JSON
with open("my-keypair.json") as f:
    keypair = json.load(f)

# Convert to Base58
private_key_base58 = base58.b58encode(bytes(keypair)).decode()
print("Base58 Private Key:", private_key_base58)

Use the output of this script as your private key in the code.

3. Validate the Key Length

Ensure the decoded private key is exactly 64 bytes:

import base58

private_key_bytes = base58.b58decode(private_key_base58)
assert len(private_key_bytes) == 64, "Invalid private key length"

4. Update Your Code

Replace the placeholder your-wallet-private-key-as-base58 with the generated Base58 private key:

from agentipy import SolanaAgentKit, create_solana_tools

agent = SolanaAgentKit(
    "your-base58-private-key",
    "https://api.mainnet-beta.solana.com",
    "your-openai-api-key"
)

tools = create_solana_tools(agent)

If everything works correctly, than that means you have copied wrong private key or something like that. Let me know if this works for you.

[collinsezedike]

@ChifaKing Please close this issue if the problem has been solved.