feat: implement AIP 11

[sleepdefic1t]

Summary

Implement AIP-11 Support.

Resolves #7 and #90.

• completely refactor transaction classes.
• add a test helper method to compare arrays across platforms.
• add a standard base58 method for Ipfs hash parsing.
• add unit test fixtures for v2 Transaction types.
• hide MultiPayment builder tests from embedded environments.
• use extraction to reduce map/json method complexity.
• add more precise calculation of json payloads for ArduinoJson.

• add and utilize packing/unpacking macros for uint value -> bytes.
• change move -> copy/copy_n semantics to prevent unwanted modification of sources.
• typedef -> using semantics for types .
• BIP66 lib version 0.2.1 -> 0.3.2.
• move BCL to an external dep.
• update docs to reflect AIP11 changes.
• update all relevant unit tests.

Checklist

• [x] Documentation (if necessary)
• [x] Tests (if necessary)
• [x] Ready to be merged

Additional Comments

Breaking changes:

• Transaction Interface.
• Transaction Builder Interface.

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (develop@56f3317). Click here to learn what that means. The diff coverage is 100%.

@@           Coverage Diff            @@
##             develop   #198   +/-   ##
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  Coverage           ?   100%           
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  Files              ?     61           
  Lines              ?   1181           
  Branches           ?      0           
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  Hits               ?   1181           
  Misses             ?      0           
  Partials           ?      0

Impacted Files	Coverage Δ
src/transactions/types/htlc_refund.hpp	100% <ø> (ø)
src/transactions/types/multi_payment.hpp	100% <ø> (ø)
src/transactions/types/multi_payment.cpp	100% <ø> (ø)
src/transactions/types/htlc_lock.cpp	100% <ø> (ø)
src/transactions/types/second_signature.cpp	100% <ø> (ø)
src/transactions/types/delegate_registration.cpp	100% <ø> (ø)
src/transactions/defaults/fees.hpp	100% <ø> (ø)
src/transactions/types/htlc_claim.hpp	100% <ø> (ø)
src/transactions/types/ipfs.cpp	100% <ø> (ø)
src/transactions/types/vote.cpp	100% <ø> (ø)
... and 29 more

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[sleepdefic1t]

@vasild On the previous discussion..

I agree, if it can’t serde, it’s not a good candidate for support.

It’s not so much a matter of whether a platform can support serde though;
 I’m more concerned with the space unit tests and fixtures take up.

The library itself doesn't take up much space and is fairly well-oriented towards embedded.
 I can sign a Tx on 8-bit platforms (Uno); it’s slow, but works. 
Adding multiple fixtures exceeds the available space though.

I’d like to eventually find a way of optimizing such that storage is improved, but testability isn’t affected.

@ciband has helped improve this situation by breaking up tests so that different aspects can be tested independently. I think this should be good enough in the mean time.



I’m leaving this out of the AIP11 feature as it’s not directly concerned with the scope here, but will continue looking at the issue separately 👍