✨ v1.2.0 has been released! ✨

[Elnaril]

No support for another Universal Router function in this release, though I have implemented 3 NFT ones (see dev branch 1.2.0.dev3.SEAPORT). But just after that the Uniswap Team decided to remove the NFT functions from the Router!
So I removed them as well ...

Ok, but what's in this release then?!

Well, there are some convenient methods that will make your life much easier when using this SDK!

1/ build_transaction()

Instead of just building the input data, you can now build the whole transaction!

It can be as simple as:

.build_transaction(sender_address)  # i/o build()

Example with a swap, from the doc:

from uniswap_universal_router_decoder import FunctionRecipient, RouterCodec

codec = RouterCodec()
trx_params = (
    codec.encode.chain().v2_swap_exact_in(
        FunctionRecipient.SENDER,  # the output tokens are sent to the transaction sender
        amount_in,  # in Wei
        min_amount_out,  # in Wei
        [
            in_token_address,  # checksum address of the token sent to the UR 
            out_token_address,  # checksum address of the received token
        ],
    ).build_transaction(
        sender_address,  # 'from'
        deadline=timestamp,  # the swap deadline
    )
)

2/ compute_gas_fees()

The SDK provides now a handy method to compute the current "priority fee" and "max fee per gas":

from uniswap_universal_router_decoder.utils import compute_gas_fees
priority_fee, max_fee_per_gas = compute_gas_fees(w3)  # w3 is a valid Web3 instance

For both above methods:

The gas fees are computed automatically based on the current chain conditions and on a trx_speed parameter which can take the following values:

• TransactionSpeed.SLOW
• TransactionSpeed.AVERAGE
• TransactionSpeed.FAST (default)
• TransactionSpeed.FASTER

3/ fetch_permit2_allowance()

This new codec method requests the permit2 allowance function to know if the UR has enough valid allowance, and to get the current permit2 nonce for a given wallet and token.

4/ Miscellaneous

• The Permit2 contract address is now configurable when building the sig-based approval. (Thanks to @speedssr and @freereaper)
• The deprecated eth_account.encode_structured_data() function has been replaced with the favoured eth_account.messages.encode_typed_data() one.

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Feel free to give me any feedback on this release here, or open a discussion or a ticket about a feature that should be in the next one!