Can't find 'simple.dart'

[mrvfino]

Hi, sorry just wondering, I cannot find 'simple.dart' in version 4.1.0, is it to be released on version 5.0.0? Thank you for this library, currently using it for a flutter-based Cardano app with Nami wallet.

[shamblett]

Yes, its in what will be the 5.0.0 release, this is imminent BTW, should be done this coming weekend.

[mrvfino]

Thanks @shamblett ! It's my first time dealing with CBOR and low level stuff, so I'm excited for the simple module, it might finally crack what I'm doing. 😁

[mrvfino]

@shamblett just wanted to ask since i'm learning stuff about CBOR if you don't mind.

Since this library uses RFC7049, is it a possible why i can't decode my cardano related CBOR data since it's under RFC 8949 standard? Thanks!

I'm having troubles in (or could be my lack of understanding) decoding the following hex encoded cbor string with how I use this package, what is the correct way to decode this one?:

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

[shamblett]

Version 5.0.0 has also been updated to RFC8949 standard. I'll look at this as soon as 5.0.0 is released.

[mrvfino]

Thanks! Btw just wanted to add this to help with your investigation: I'm able to convert it using this service: https://cbor.me/

[mrvfino]

@shamblett ! I was able to figure it out now, sorry for the bother. There are no issues with the package when it comes to decoding it. It was just too low level unlike the service i was using. Plus correct me if I'm wrong but the decoding process isn't nested right? And i still need to decode the hex per item here? Since this is already the correct data, but it's just a matter of decoding the List's to hex. Is there a property I could toggle to automatically do that?

[[443633415, {[0, 198, 58, 118, 115, 27, 31, 66, 18, 178, 241, 52, 110, 101, 24, 33, 185, 36, 226, 48, 48, 94, 99, 13, 93, 39, 47, 80]: {[65, 83, 73, 77, 79, 66, 48, 48, 50, 48]: 1}, [11, 40, 2, 127, 219, 72, 181, 247, 249, 126, 140, 147, 229, 147, 155, 200, 94, 185, 240, 231, 254, 147, 227, 84, 103, 44, 230, 125]: {[105, 115, 108, 97, 100, 105, 119, 97, 54, 52, 57]: 1, [105, 115, 108, 97, 100, 105, 119, 97, 55, 49, 51]: 1}, [11, 198, 140, 9, 115, 167, 232, 55, 77, 35, 42, 250, 214, 41, 147, 154, 214, 227, 218, 69, 50, 156, 150, 194, 17, 209, 154, 5]: {[109, 99, 104, 118, 114, 115, 80, 114, 105, 118, 97, 116, 101, 52, 50, 49]: 1, [109, 99, 104, 118, 114, 115, 80, 114, 105, 118, 97, 116, 101, 52, 54, 51, 53]: 1, [109, 99, 104, 118, 114, 115, 80, 114, 105, 118, 97, 116, 101, 52, 55, 52, 49]: 1, [109, 99, 104, 118, 114, 115, 80, 114, 105, 118, 97, 116, 101, 53, 49, 52, 56]: 1, [109, 99, 104, 118, 114, 115, 80, 114, 105, 118, 97, 116, 101, 55, 50, 52, 50]: 1}, [17, 255, 14, 13, 154, 208, 55, 209, 142, 62, 213, 117, 205, 53, 160, 81, 59, 132, 115, 248, 48, 8, 18, 77, 184, 159, 29, 143]: {[72, 97, 112, 112, 121, 72, 111, 112, 112, 101, 114, 48, 53, 53, 52, 56]: 1, [72, 97, 112, 112, 121, 72, 111, 112, 112, 101, 114, 48, 56, 52, 49, 56]: 1}, [30, 193, 156, 22, 41, 134, 155, 255, 214, 73, 231, 72, 226, 155, 200, 28, 149, 29, 225, 114, 177, 181, 66, 23, 19, 139, 53, 201]: {[79, 79, 90, 49, 69, 83, 52, 53]: 1, [79, 79, 90, 49, 69, 83, 49, 57, 55, 50]: 1, [79, 79, 90, 49, 69, 83, 54, 48, 53, 51]: 1, [79, 79, 90, 49, 69, 83, 55, 55, 51, 51]: 1, [79, 79, 90, 49, 69, 83, 55, 55, 55, 57]: 1, [79, 79, 90, 49, 69, 83, 56, 57, 50, 50]: 1, [79, 79, 90, 49, 69, 83, 57, 57, 56, 57]: 1}, [54, 145, 206, 0, 216, 162, 189, 3, 90, 133, 215, 126, 84, 40, 227, 77, 165, 141, 233, 172, 190, 237, 238, 232, 37, 107, 129, 117]: {[83, 80, 65, 67, 69, 66, 65, 66, 69, 90, 51, 50, 53, 57]: 1, [83, 80, 65, 67, 69, 66, 65, 66, 69, 90, 51, 55, 50, 54]: 1, [83, 80, 65, 67, 69, 66, 65, 66, 69, 90, 52, 50, 56, 54]: 1, [83, 80, 65, 67, 69, 66, 65, 66, 69, 90, 53, 57, 49, 53]: 1, [83, 80, 65, 67, 69, 66, 65, 66, 69, 90, 54, 49, 48, 51]: 1}, [60, 17, 105, 240, 51, 111, 96, 196, 106, 160, 101, 27, 216, 19, 12, 143, 53, 160, 1, 0, 92, 247, 89, 155, 178, 93, 124, 248]: {[66, 97, 98, 121, 65, 108, 105, 101, 110, 82, 111, 99, 107, 48, 53, 51, 55]: 1}, [61, 138, 108, 63, 251, 60, 7, 68, 125, 70, 115, 141, 65, 137, 178, 227, 45, 200, 197, 110, 241, 250, 245, 169, 230, 96, 156, 119]: {[65, 115, 105, 109, 111, 98, 48, 49, 57, 55]: 1, [65, 115, 105, 109, 111, 98, 49, 53, 55, 52]: 1, [65, 115, 105, 109, 111, 98, 52, 53, 57, 54]: 1, [65, 115, 105, 109, 111, 98, 52, 54, 55, 56]: 1}, [75, 156, 68, 197, 58, 32, 205, 250, 236, 4, 246, 162, 77, 214, 87, 32, 55, 165, 74, 237, 39, 164, 100, 123, 64, 2, 85, 243]: {[72, 97, 114, 100, 70, 111, 114, 107, 49, 57, 56, 53]: 1}, [76, 159, 125, 108, 36, 186, 142, 43, 18, 243, 38, 154, 195, 141, 112, 96, 37, 227, 154, 80, 165, 36, 175, 230, 234, 247, 157, 149]: {[86, 101, 103, 103, 105, 101, 109, 97, 116, 101, 48, 55, 57, 56, 56]: 1}, [77, 48, 248, 103, 215, 160, 228, 204, 11, 125, 120, 63, 71, 188, 18, 140, 224, 12, 47, 3, 90, 146, 218, 14, 141, 100, 82, 154]: {[67, 97, 114, 100, 97, 110, 105, 118, 97, 108, 88, 76, 111, 119, 80, 111, 108, 121, 48, 49, 55]: 1}, [119, 36, 218, 101, 25, 187, 221, 165, 6, 228, 216, 172, 206, 17, 224, 30, 1, 1, 151, 38, 221, 240, 23, 65, 143, 156, 149, 138]: {[67, 114, 121, 112, 116, 111, 68, 111, 103, 103, 105, 101, 54, 56, 48, 49]: 1}, [141, 78, 175, 129, 187, 218, 229, 60, 198, 73, 45, 27, 97, 137, 95, 165, 127, 151, 120, 74, 110, 248, 8, 105, 24, 36, 13, 203]: {[83, 104, 97, 114, 107, 67, 111, 110, 116, 114, 97, 99, 116, 50, 52]: 1}, [155, 251, 56, 219, 82, 28, 206, 99, 192, 181, 69, 147, 69, 75, 78, 103, 5, 193, 142, 87, 217, 14, 173, 19, 35, 220, 105, 191]: {[70, 105, 115, 104, 121, 70, 114, 105, 101, 110, 100, 48, 54, 48, 54, 48]: 1}, [160, 38, 132, 185, 236, 232, 74, 67, 65, 88, 93, 42, 232, 19, 22, 51, 86, 186, 12, 169, 80, 9, 29, 25, 53, 189, 185, 5]: {[72, 85, 83, 75, 89, 72, 79, 83, 84, 76, 69, 82, 48, 48, 52, 52, 51]: 1, [72, 85, 83, 75, 89, 72, 79, 83, 84, 76, 69, 82, 48, 54, 57, 50, 53]: 1, [72, 85, 83, 75, 89, 72, 79, 83, 84, 76, 69, 82, 49, 48, 50, 54, 50]: 1, [72, 85, 83, 75, 89, 72, 79, 83, 84, 76, 69, 82, 49, 49, 54, 56, 53]: 1, [72, 85, 83, 75, 89, 72, 79, 83, 84, 76, 69, 82, 49, 51, 54, 53, 51]: 1, [72, 85, 83, 75, 89, 72, 79, 83, 84, 76, 69, 82, 49, 57, 52, 53, 50]: 1, [72, 85, 83, 75, 89, 72, 79, 83, 84, 76, 69, 82, 49, 57, 52, 56, 56]: 1}, [160, 170, 30, 178, 68, 2, 81, 32, 140, 212, 186, 98, 162, 206, 143, 232, 116, 135, 155, 231, 163, 149, 232, 213, 19, 244, 127, 184]: {[84, 104, 101, 76, 97, 115, 116, 71, 117, 110, 115, 108, 105, 110, 103, 101, 114, 49, 50, 54]: 1}, [165, 187, 14, 91, 178, 117, 165, 115, 215, 68, 160, 33, 249, 179, 191, 247, 53, 149, 70, 142, 0, 39, 85, 180, 71, 224, 21, 89]: {[72, 79, 83, 75, 89, 67, 97, 115, 104, 71, 114, 97, 98, 48, 48, 48, 48, 52, 48, 53, 52, 48]: 1, [72, 79, 83, 75, 89, 67, 97, 115, 104, 71, 114, 97, 98, 48, 48, 48, 48, 52, 48, 53, 52, 49]: 1, [72, 79, 83, 75, 89, 67, 97, 115, 104, 71, 114, 97, 98, 48, 48, 48, 48, 52, 48, 53, 52, 50]: 1, [72, 79, 83, 75, 89, 67, 97, 115, 104, 71, 114, 97, 98, 48, 48, 48, 48, 52, 48, 53, 52, 51]: 1, [72, 79, 83, 75, 89, 67, 97, 115, 104, 71, 114, 97, 98, 48, 48, 48, 48, 52, 48, 53, 52, 52]: 1}, [187, 234, 104, 136, 15, 139, 21, 188, 207, 160, 15, 35, 48, 122, 14, 106, 218, 162, 178, 192, 68, 199, 38, 106, 77, 248, 97, 136]: {[67, 78, 70, 84, 67, 97, 114, 100, 48, 50, 50, 55]: 1}, [190, 142, 36, 43, 4, 25, 216, 122, 21, 178, 63, 3, 126, 255, 4, 103, 150, 252, 96, 194, 129, 220, 232, 155, 183, 150, 107, 192]: {[65, 108, 105, 99, 101, 54, 51]: 1, [86, 105, 111, 108, 101, 116, 57, 56]: 1, [65, 112, 111, 99, 97, 108, 121, 112, 115, 101, 49]: 1, [68, 114, 97, 119, 115, 116, 114, 105, 110, 103, 49, 55, 53]: 1}, [199, 254, 58, 60, 52, 67, 162, 163, 212, 83, 239, 183, 223, 12, 39, 103, 18, 187, 34, 248, 71, 15, 18, 150, 95, 92, 174, 66]: {[71, 114, 101, 101, 110, 70, 111, 117, 110, 100, 101, 114, 50, 51, 51, 51]: 1, [71, 114, 101, 101, 110, 70, 111, 117, 110, 100, 101, 114, 52, 49, 57, 55]: 1}, [200, 156, 81, 232, 70, 207, 6, 176, 227, 163, 180, 51, 83, 55, 207, 110, 21, 178, 34, 109, 224, 62, 181, 190, 189, 88, 13, 116]: {[80, 114, 101, 109, 105, 110, 116, 105, 110, 103, 84, 101, 115, 116, 78, 70, 84]: 1, [84, 111, 107, 101, 110, 78, 97, 109, 101, 80, 114, 101, 102, 105, 120, 80, 76, 65, 67, 69, 72, 79, 76, 68, 69, 82, 48, 48, 48, 49]: 1}, [201, 99, 59, 221, 149, 200, 65, 2, 112, 167, 176, 82, 204, 54, 82, 235, 47, 123, 222, 205, 216, 52, 190, 146, 32, 47, 113, 54]: {[67, 90, 48, 49, 49, 50, 67, 79, 77, 77, 79, 78, 51, 55, 50]: 1}, [202, 58, 234, 165, 60, 11, 33, 252, 207, 40, 200, 199, 36, 20, 20, 115, 211, 37, 254, 158, 168, 208, 49, 79, 124, 59, 66, 64]: {[66, 105, 116, 108, 97, 110, 100, 115, 48, 120, 48, 52, 49, 53, 55]: 1, [66, 105, 116, 108, 97, 110, 100, 115, 48, 120, 48, 53, 52, 52, 57]: 1}, [209, 175, 198, 136, 170, 168, 180, 241, 141, 68, 0, 116, 218, 31, 84, 245, 233, 219, 170, 62, 239, 137, 87, 226, 78, 242, 26, 122]: {[70, 111, 111, 84, 101, 115, 116, 73, 109, 97, 103, 101]: 1}, [236, 46, 28, 49, 78, 231, 84, 206, 164, 186, 58, 252, 105, 247, 75, 33, 48, 248, 123, 179, 146, 142, 26, 30, 133, 52, 194, 9]: {[82, 97, 103, 105, 110, 103, 84, 101, 101, 110, 48, 48, 52, 49, 57]: 1, [82, 97, 103, 105, 110, 103, 84, 101, 101, 110, 48, 51, 50, 48, 49]: 1}, [241, 29, 219, 218, 219, 199, 183, 139, 113, 16, 41, 50, 129, 132, 75, 168, 172, 172, 145, 143, 30, 213, 118, 117, 57, 215, 213, 46]: {[71, 111, 111, 102, 121, 71, 97, 110, 103, 52, 55, 50, 54]: 1}, [241, 234, 210, 50, 200, 10, 50, 112, 5, 243, 165, 131, 100, 48, 170, 37, 173, 177, 182, 58, 83, 45, 9, 221, 97, 190, 128, 42]: {[72, 79, 83, 75, 69, 86, 69, 82, 83, 69, 51, 53, 57, 51]: 1, [72, 79, 83, 75, 69, 86, 69, 82, 83, 69, 54, 55, 54, 56]: 1, [72, 79, 83, 75, 69, 86, 69, 82, 83, 69, 56, 52, 48, 51]: 1, [72, 79, 83, 75, 69, 86, 69, 82, 83, 69, 56, 52, 48, 54]: 1, [72, 79, 83, 75, 69, 86, 69, 82, 83, 69, 57, 54, 51, 53]: 1}}]]

[nicbn]

Plus correct me if I'm wrong but the decoding process isn't nested right?

When 5.0.0 is released the process will be nested, just a matter of putting the list of bytes inside a CborBytes

[mrvfino]

Alright, thanks!

[shamblett]

Package version 5.0.0 is now published, please check if your concerns above have now been addressed.

[mrvfino]

Thanks @shamblett !

[mrvfino]

Hi @nicbn @shamblett ! It converts recursively now, thanks! I just need help in understanding what kind of encoding does CborJsonEncoder().convert use. It didn't come out as my expected data but it's consistent judging by the conversion of 4173696D6F62343 to QXNpbW9iNDY (these are prefixes of asset names). :D

Raw hex encoded bytes string:

821a4dddd31aa2581c3d8a6c3ffb3c07447d46738d4189b2e32dc8c56ef1faf5a9e6609c77a24a4173696d6f6234353936014a4173696d6f623436373801581c884892bcdc360bcef87d6b3f806e7f9cd5ac30d999d49970e7a903aea14550415649411903e8

what i did:

 final walletBalance = await ada.getBalanceFuture; // hex encoded bytes string
 final payload = hex.decode(walletBalance);
 final value = cbor.cborDecode(payload);
 print(cbor.CborJsonEncoder().convert(value));

result via the code above:

[1306383130,{"PYpsP_s8B0R9RnONQYmy4y3IxW7x-vWp5mCcdw":{"QXNpbW9iNDU5Ng":1,"QXNpbW9iNDY3OA":1},"iEiSvNw2C874fWs_gG5_nNWsMNmZ1Jlw56kDrg":{"UEFWSUE":1000}}]

my expected result via https://www.cbor.me:

[1306383130, {h'3D8A6C3FFB3C07447D46738D4189B2E32DC8C56EF1FAF5A9E6609C77': {h'4173696D6F6234353936': 1, h'4173696D6F6234363738': 1}, h'884892BCDC360BCEF87D6B3F806E7F9CD5AC30D999D49970E7A903AE': {h'5041564941': 1000}}]

[mrvfino]

Update: It seems that the Asset names (i.e. QXNpbW9iNDU5Ng) are in base64 but the policy id's (i.e. PYpsP_s8B0R9RnONQYmy4y3IxW7x-vWp5mCcdw) aren't.

[nicbn]

The CborJsonEncoder encodes bytes as base64, cbor.me shows diagnostic notation which converts these to hexadecimal instead. Currently there is no way to print diagnostic notation, but pretty print will show the bytes plus annotations, which you can compare to cbor.me byte notation.

The conversion that CborJsonEncoder uses is described in the RFC 8949 (https://www.rfc-editor.org/rfc/rfc8949.html). It always converts bytes to base64 unless you apply hints.