Merge pull request #62 from Elnaril/1.2.0.dev2

1.2.0.dev2 - add fetch_permit2_allowance()
Elnaril · May 17, 2024 · c8d2894 · c8d2894
2 parents f43e320 + 0a73af6
commit c8d2894
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diff --git a/README.md b/README.md
@@ -313,7 +313,7 @@ data, signable_message = codec.create_permit2_signable_message(
     token_address,
     amount,  # max = 2**160 - 1
     expiration,
-    nonce,  # Permit2 nonce
+    nonce,  # Permit2 nonce, see below how to get it
     spender,  # The UR checksum address
     deadline,
     1,  # chain id
@@ -332,6 +332,12 @@ transaction["data"] = encoded_data
 ```
 After that, you can swap tokens using the Uniswap universal router.
 
+#### How to get the current permit2 allowance, expiration and nonce
+You can get the nonce you need to build the permit2 signable message like this:
+```python
+amount, expiration, nonce = codec.fetch_permit2_allowance(acc.address, token_address)  # where acc is your LocalAccount
+```
+
 ### How to chain a call to PERMIT2_PERMIT and V2_SWAP_EXACT_IN in the same transaction
 Don't forget to give a token allowance to the Permit2 contract as well.
 

diff --git a/coverage.json b/coverage.json
@@ -1 +1 @@
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