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fix: encoding ints/uints #854

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Summary of Changes

  • Fixes the ABI encoding of int and uint which was not taking the bits parameter into account

Test Data or Screenshots

  • Fixes and updates tests in ABIEncoderTest
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  • I have reviewed the Contribution Guidelines.
  • I have performed a self-review of my own code.
  • I have updated my repository to match the develop branch.
  • I have included test data or screenshots that prove my fix is effective or that my feature works.
  • I have checked that all tests work and swiftlint is not throwing any errors/warnings.

// This one shouldn't have data offset
hexData = ABIEncoder.encode(types: [.array(type: .uint(bits: 8), length: 4)], values: [[1, 2, 3, 4]])?.toHexString()
// First 32 bytes are the first value from the array
XCTAssertEqual(hexData?[0..<64], "0000000000000000000000000000000000000000000000000000000000000001")
XCTAssertEqual(hexData, "0000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000004")
// XCTAssertEqual(hexData?[0..<32], "0000000000000000000000000000000000000000000000000000000000000001")
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Wasn't sure about this line. @JeneaVranceanu @yaroslavyaroslav

Is it actually needed or could it be deleted? Because of the bug fix of uint bits this hex string is now signficantly shorter.

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