feat: add addLiquidity and Permit2 batch support

[luchobonatti]

Add AddLiquidity and Permit2 Batch Support

Overview

This PR adds support for adding liquidity to Uniswap V4 pools and implements Permit2 batch signature handling for gas-efficient token approvals.

Changes

• Added buildAddLiquidityCallData utility for creating add liquidity transactions
• Implemented preparePermit2BatchData for handling batch token approvals
• Updated SDK instance to support new functionality
• Added comprehensive test coverage for new features

Technical Details

• buildAddLiquidityCallData supports:
  • Single token liquidity addition
  • Dual token liquidity addition
  • Permit2 batch signature integration
• preparePermit2BatchData handles:
  • Multiple token approvals in a single transaction
  • Native token (ETH) filtering
  • Custom deadline support
• Updated SDK types and interfaces to support new functionality

Testing

Added test suites for:

• buildAddLiquidityCallData.test.ts
• preparePermit2BatchData.test.ts
• Updated existing tests to maintain compatibility

Usage Example

// Without permit
const { calldata, value } = await uniDevKit.buildAddLiquidityCallData({
  pool,
  amount0: "100000000",
  amount1: "50000000000000000",
  recipient: "0x...",
  slippageTolerance: 50
});

// With Permit2 batch approval
const permitData = await uniDevKit.preparePermit2BatchData({
  tokens: [pool.token0.address, pool.token1.address],
  spender: uniDevKit.getContractAddress('positionManager'),
  owner: userAddress
});

const signature = await signer.signTypedData(
  permitData.toSign.domain,
  permitData.toSign.types,
  permitData.toSign.values
);

const permitWithSignature = permitData.buildPermit2BatchDataWithSignature(signature);

const { calldata, value } = await uniDevKit.buildAddLiquidityCallData({
  pool,
  amount0: parseUnits("100", 6),
  recipient: "0x...",
  permit2BatchSignature: permitWithSignature
});

const tx = await sendTransaction({
  to: uniDevKit.getContractAddress('positionManager'),
  data: calldata,
  value
});

[github-actions]

🎉 This PR is included in version 1.0.9 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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