[framework] base64 support url decode

[baicaiyihao]

Summary

I added a logic check to handle the decoding of both STANDARD and URL_SAFE base64 encoding formats. Please check if there are any issues.

Here is the test code for base64 decode:

/*
/// Module: testrooch
module testrooch::testrooch {
}
*/
module testrooch::testrooch {
    use std::vector;
    use moveos_std::base64::{ decode };

    const E_DECODE_FAILED: u64 = 1;

    #[test]
    fun test_decode() {
        let encoded_input = b"/////w==";
        let decoded = decode(&encoded_input);
        let v = vector::empty<u8>();

        vector::push_back(&mut v, 255);
        vector::push_back(&mut v, 255);
        vector::push_back(&mut v, 255);
        vector::push_back(&mut v, 255);
        decode(&encoded_input);

        assert!(v == decoded, E_DECODE_FAILED);
    }

    #[test]
    fun test_url_safe_decode() {
        let encoded_input = b"_____w";
        let decoded = decode(&encoded_input);
        let v = vector::empty<u8>();

        vector::push_back(&mut v, 255);
        vector::push_back(&mut v, 255);
        vector::push_back(&mut v, 255);
        vector::push_back(&mut v, 255);
        decode(&encoded_input);

        assert!(v == decoded, E_DECODE_FAILED);
    }


    #[test]
    fun test_decode1() {
        let encoded_input = b"aHR0cHM6Ly9naXRodWIuY29tL3Jvb2NoLW5ldHdvcmsvcm9vY2gvYmxvYi8zZTdjNjNjZjMyMmMzZGZkMmU2ZTE0MTkzOTM4OTdlYjEzY2M0Mjk0L2ZyYW1ld29ya3MvbW92ZW9zLXN0ZGxpYi9zcmMvbmF0aXZlcy9tb3Zlb3Nfc3RkbGliL2Jhc2U2NC5ycw==";
        let decoded = decode(&encoded_input);
        let expected = b"https://github.com/rooch-network/rooch/blob/3e7c63cf322c3dfd2e6e1419393897eb13cc4294/frameworks/moveos-stdlib/src/natives/moveos_stdlib/base64.rs";

        assert!(decoded == expected, E_DECODE_FAILED);
    }

    #[test]
    fun test_url_safe_decode1() {
        let encoded_input = b"aHR0cHM6Ly9naXRodWIuY29tL3Jvb2NoLW5ldHdvcmsvcm9vY2gvYmxvYi8zZTdjNjNjZjMyMmMzZGZkMmU2ZTE0MTkzOTM4OTdlYjEzY2M0Mjk0L2ZyYW1ld29ya3MvbW92ZW9zLXN0ZGxpYi9zcmMvbmF0aXZlcy9tb3Zlb3Nfc3RkbGliL2Jhc2U2NC5ycw";
        let decoded = decode(&encoded_input);
        let expected = b"https://github.com/rooch-network/rooch/blob/3e7c63cf322c3dfd2e6e1419393897eb13cc4294/frameworks/moveos-stdlib/src/natives/moveos_stdlib/base64.rs";

        assert!(decoded == expected, E_DECODE_FAILED);
    }
}

result

rooch move test
INCLUDING DEPENDENCY MoveStdlib
INCLUDING DEPENDENCY MoveosStdlib
INCLUDING DEPENDENCY RoochFramework
BUILDING testrooch
Running Move unit tests
[ PASS    ] 0xfe88a84f5c2b508331475ae552259d1319f873e5680b5fdd650c41730dced646::testrooch::test_decode
[ PASS    ] 0xfe88a84f5c2b508331475ae552259d1319f873e5680b5fdd650c41730dced646::testrooch::test_decode1
[ PASS    ] 0xfe88a84f5c2b508331475ae552259d1319f873e5680b5fdd650c41730dced646::testrooch::test_url_safe_decode
[ PASS    ] 0xfe88a84f5c2b508331475ae552259d1319f873e5680b5fdd650c41730dced646::testrooch::test_url_safe_decode1
Test result: OK. Total tests: 4; passed: 4; failed: 0

Please review if there are any issues.

• Closes [framework] base64 support url decode #2860

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[jolestar]

Please put the unit test in the framework code.

[baicaiyihao]

Add base64_tests.move
frameworks/moveos-stdlib/tests/base64_tests.move

result:

Please review @jolestar

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

Files not reviewed (1)

• frameworks/moveos-stdlib/tests/base64_tests.move: Language not supported

Comments suppressed due to low confidence (1)

frameworks/moveos-stdlib/src/natives/moveos_stdlib/base64.rs:64

• The variable 'bytes_ref' is defined but not used directly. It is redundant and should be removed.

let bytes_ref = encoded_input.as_bytes_ref();