This adds a field to the TxId digest to include the burn fields of
the transaction to the SIGHASH.

…ero number of issuance actions are present. (#54)

As described in the title, this adds to the transaction format to
require that the `ik` and `issueAuthSig` fields be present in the
transaction format if and only if there are a non-zero number of
issuance actions.

…he V7 transaction details (#55)

A quick summary of the changes here:
- The `assetDescSize` field in the issuance action description is
encoded as a `compactSize` type, as is standard across the specification
(and also allows for the use of the existing methods in the
implementation).
- The description of the notes used inside the issuance bundle were
explicitly serialized to remove ambiguity.
- The type of the `valueBurn` field was set to the standard `uint64`
type.
- The order of the Orchard bundle fields was adjusted to have the
binding signature after the burn fields.

This resolves zcash#752

#57)

This resolves zcash#846

This PR catches our latest changes up with the rearranging of the
repository performed upstream.

…s map (#59)

This adds a map called `issued_assets` to the global state. This is
used to track ZSA balances in the shielded pool along the lines of ZIP
209.

This should resolve zcash#844.

This adds the symbolic link above in order to allow the
[qed-it.github.io/zips](qed-it.github.io/zips) website to work correctly
post the upstream repository restructure.

…escription string size (#61)

This rewrites the burn mechanism description in ZIP 226 in order to
remove some ambiguously defined terms, and improve the clarity of the
specification.

It also adds the rationale for the choice of 512 bytes for the maximum
length of the asset description string in ZIP 227, which resolves zcash#843
(along with the additions in the already merged #59)

)

This catches the zsa1 branch up to the latest upstream changes.
It also comments out a line from the render.yml file to allow the CI to
run correctly.

This adds the NU6 changes from upstream to our branch.

This updates the protocol spec references from 2023.4.0 [NU5] to
2024.5.1 [NU6], along with some minor section changes and renumbering.
It also fixes some old links in favour of updated ones.

This resolves zcash#751 for the present.

This makes the changes to align with the change in notation for ZIP
32 done in zcash#908.

Co-authored-by: Daira-Emma Hopwood <daira@jacaranda.org>

This makes changes from the review made on zcash#854.

This is done in response to
zcash#667 (comment)