diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,164 +1,164 @@
-
-
-
-
-# x402 OpenAI Python
-
-**Drop-in OpenAI Python client with transparent [x402](https://www.x402.org/) payment support.**
-
-[](https://pypi.org/project/x402-openai/)
-[](https://python.org)
-[](https://github.com/qntx/x402-openai-python/actions)
-[](LICENSE)
-
-
-
----
-
-Wrap the standard `openai.OpenAI` client with a crypto wallet.
-When the server responds with **HTTP 402**, the library automatically signs and retries the request — zero code changes needed.
-
-## Installation
-
-```bash
-pip install x402-openai[evm] # Ethereum / Base / …
-pip install x402-openai[svm] # Solana
-pip install x402-openai[all] # all chains
-```
-
-## Quick Start
-
-```python
-from x402_openai import X402OpenAI
-from x402_openai.wallets import EvmWallet
-
-client = X402OpenAI(wallet=EvmWallet(private_key="0x…"))
-
-res = client.chat.completions.create(
- model="openai/gpt-4o-mini",
- messages=[{"role": "user", "content": "Hello!"}],
-)
-print(res.choices[0].message.content)
-```
-
-Swap `EvmWallet` for `SvmWallet` to pay on Solana — the API is identical.
-
-## Usage
-
-### Async & Streaming
-
-```python
-from x402_openai import AsyncX402OpenAI
-
-client = AsyncX402OpenAI(wallet=EvmWallet(private_key="0x…"))
-
-stream = await client.chat.completions.create(
- model="openai/gpt-4o-mini",
- messages=[{"role": "user", "content": "Explain x402"}],
- stream=True,
-)
-async for chunk in stream:
- if chunk.choices[0].delta.content:
- print(chunk.choices[0].delta.content, end="")
-```
-
-### Multi-chain
-
-```python
-from x402_openai.wallets import EvmWallet, SvmWallet
-
-client = X402OpenAI(wallets=[
- EvmWallet(private_key="0x…"),
- SvmWallet(private_key="base58…"),
-])
-```
-
-### BIP-39 Mnemonic (EVM)
-
-```python
-wallet = EvmWallet(mnemonic="word1 word2 … word12")
-wallet = EvmWallet(mnemonic="…", account_index=2) # m/44'/60'/0'/0/2
-wallet = EvmWallet(mnemonic="…", derivation_path="m/44'/60'/2'/0/0") # custom path
-```
-
-The protocol selects the right chain automatically based on the server's payment requirements.
-
-### Payment Policies
-
-Use policies to control which chain or scheme is preferred when multiple payment options are available:
-
-```python
-from x402_openai import X402OpenAI, prefer_network, prefer_scheme, max_amount
-from x402_openai.wallets import EvmWallet, SvmWallet
-
-client = X402OpenAI(
- wallets=[
- EvmWallet(private_key="0x…"),
- SvmWallet(private_key="base58…"),
- ],
- policies=[
- prefer_network("eip155:8453"), # Prefer Base mainnet
- prefer_scheme("exact"), # Prefer exact payment scheme
- max_amount(1_000_000), # Cap at 1 USDC (6 decimals)
- ],
-)
-```
-
-## API Reference
-
-### `X402OpenAI` / `AsyncX402OpenAI`
-
-Drop-in replacement for `openai.OpenAI` / `openai.AsyncOpenAI`. Provide **exactly one** credential source:
-
-| Parameter | Type | Description |
-| :-- | :-- | :-- |
-| `wallet` | `Wallet` | Single wallet adapter |
-| `wallets` | `list[Wallet]` | Multiple adapters (multi-chain) |
-| `policies` | `list[Policy]` | Payment policies (chain/scheme preference, amount cap) |
-| `x402_client` | `x402HTTPClient*` | Pre-configured x402 client (bypasses `policies`) |
-
-All standard OpenAI kwargs (`base_url`, `timeout`, `max_retries`, …) are forwarded.
-Default `base_url`: `https://llm.qntx.fun/v1`
-
-### Wallet Adapters
-
-| Class | Chain | Extra |
-| :-- | :-- | :-- |
-| `EvmWallet(private_key=…)` | EVM | `x402-openai[evm]` |
-| `EvmWallet(mnemonic=…)` | EVM (BIP-39) | `x402-openai[evm]` |
-| `SvmWallet(private_key=…)` | Solana | `x402-openai[svm]` |
-
-Implement the [`Wallet`](src/x402_openai/wallets/_base.py) protocol to add a new chain.
-
-### Low-level Transports
-
-`X402Transport` / `AsyncX402Transport` — httpx transports for manual wiring into any `httpx.Client`.
-
-## Examples
-
-See the [`examples/`](examples/) directory. Each script is self-contained:
-
-```bash
-EVM_PRIVATE_KEY="0x…" python examples/chat_evm.py
-SOLANA_PRIVATE_KEY="base58…" python examples/chat_svm.py
-EVM_PRIVATE_KEY="0x…" python examples/streaming_evm.py
-MNEMONIC="word1 word2 …" python examples/chat_evm_mnemonic.py
-EVM_PRIVATE_KEY="0x…" python examples/chat_evm_policy.py
-EVM_PRIVATE_KEY="0x…" python examples/streaming_evm_policy.py
-```
-
-## License
-
-This project is licensed under the [MIT License](LICENSE).
-
----
-
-
-
-A **[QuantX](https://qntx.fun)** open-source project.
-
-

-
-Code is law. We write both.
-
-
+
+
+
+
+# x402 OpenAI Python
+
+**Drop-in OpenAI Python client with transparent [x402](https://www.x402.org/) payment support.**
+
+[](https://pypi.org/project/x402-openai/)
+[](https://python.org)
+[](https://github.com/qntx/x402-openai-python/actions)
+[](LICENSE)
+
+
+
+---
+
+Wrap the standard `openai.OpenAI` client with a crypto wallet.
+When the server responds with **HTTP 402**, the library automatically signs and retries the request — zero code changes needed.
+
+## Installation
+
+```bash
+pip install x402-openai[evm] # Ethereum / Base / …
+pip install x402-openai[svm] # Solana
+pip install x402-openai[all] # all chains
+```
+
+## Quick Start
+
+```python
+from x402_openai import X402OpenAI
+from x402_openai.wallets import EvmWallet
+
+client = X402OpenAI(wallet=EvmWallet(private_key="0x…"))
+
+res = client.chat.completions.create(
+ model="openai/gpt-4o-mini",
+ messages=[{"role": "user", "content": "Hello!"}],
+)
+print(res.choices[0].message.content)
+```
+
+Swap `EvmWallet` for `SvmWallet` to pay on Solana — the API is identical.
+
+## Usage
+
+### Async & Streaming
+
+```python
+from x402_openai import AsyncX402OpenAI
+
+client = AsyncX402OpenAI(wallet=EvmWallet(private_key="0x…"))
+
+stream = await client.chat.completions.create(
+ model="openai/gpt-4o-mini",
+ messages=[{"role": "user", "content": "Explain x402"}],
+ stream=True,
+)
+async for chunk in stream:
+ if chunk.choices[0].delta.content:
+ print(chunk.choices[0].delta.content, end="")
+```
+
+### Multi-chain
+
+```python
+from x402_openai.wallets import EvmWallet, SvmWallet
+
+client = X402OpenAI(wallets=[
+ EvmWallet(private_key="0x…"),
+ SvmWallet(private_key="base58…"),
+])
+```
+
+### BIP-39 Mnemonic (EVM)
+
+```python
+wallet = EvmWallet(mnemonic="word1 word2 … word12")
+wallet = EvmWallet(mnemonic="…", account_index=2) # m/44'/60'/0'/0/2
+wallet = EvmWallet(mnemonic="…", derivation_path="m/44'/60'/2'/0/0") # custom path
+```
+
+The protocol selects the right chain automatically based on the server's payment requirements.
+
+### Payment Policies
+
+Use policies to control which chain or scheme is preferred when multiple payment options are available:
+
+```python
+from x402_openai import X402OpenAI, prefer_network, prefer_scheme, max_amount
+from x402_openai.wallets import EvmWallet, SvmWallet
+
+client = X402OpenAI(
+ wallets=[
+ EvmWallet(private_key="0x…"),
+ SvmWallet(private_key="base58…"),
+ ],
+ policies=[
+ prefer_network("eip155:8453"), # Prefer Base mainnet
+ prefer_scheme("exact"), # Prefer exact payment scheme
+ max_amount(1_000_000), # Cap at 1 USDC (6 decimals)
+ ],
+)
+```
+
+## API Reference
+
+### `X402OpenAI` / `AsyncX402OpenAI`
+
+Drop-in replacement for `openai.OpenAI` / `openai.AsyncOpenAI`. Provide **exactly one** credential source:
+
+| Parameter | Type | Description |
+| :-- | :-- | :-- |
+| `wallet` | `Wallet` | Single wallet adapter |
+| `wallets` | `list[Wallet]` | Multiple adapters (multi-chain) |
+| `policies` | `list[Policy]` | Payment policies (chain/scheme preference, amount cap) |
+| `x402_client` | `x402HTTPClient*` | Pre-configured x402 client (bypasses `policies`) |
+
+All standard OpenAI kwargs (`base_url`, `timeout`, `max_retries`, …) are forwarded.
+Default `base_url`: `https://llm.qntx.org/v1`
+
+### Wallet Adapters
+
+| Class | Chain | Extra |
+| :-- | :-- | :-- |
+| `EvmWallet(private_key=…)` | EVM | `x402-openai[evm]` |
+| `EvmWallet(mnemonic=…)` | EVM (BIP-39) | `x402-openai[evm]` |
+| `SvmWallet(private_key=…)` | Solana | `x402-openai[svm]` |
+
+Implement the [`Wallet`](src/x402_openai/wallets/_base.py) protocol to add a new chain.
+
+### Low-level Transports
+
+`X402Transport` / `AsyncX402Transport` — httpx transports for manual wiring into any `httpx.Client`.
+
+## Examples
+
+See the [`examples/`](examples/) directory. Each script is self-contained:
+
+```bash
+EVM_PRIVATE_KEY="0x…" python examples/chat_evm.py
+SOLANA_PRIVATE_KEY="base58…" python examples/chat_svm.py
+EVM_PRIVATE_KEY="0x…" python examples/streaming_evm.py
+MNEMONIC="word1 word2 …" python examples/chat_evm_mnemonic.py
+EVM_PRIVATE_KEY="0x…" python examples/chat_evm_policy.py
+EVM_PRIVATE_KEY="0x…" python examples/streaming_evm_policy.py
+```
+
+## License
+
+This project is licensed under the [MIT License](LICENSE).
+
+---
+
+
+
+A **[QuantX](https://qntx.org)** open-source project.
+
+

+
+Code is law. We write both.
+
+