S4.1 gave documents a number, terms, line accounts and snapshots, and S4.2
gave parties an email and default terms, but the store journaled none of
them: a document carrying one was refused by a temporary guard, because a
public write that replay loses would break I-3. This slice makes the
journal carry them.
- `invoice.created` and `bill.created` write a number, terms, bill-to and
seller snapshots, references, memo and a duplicate's reason, and each
line its account, quantity and unit price, every key only when set. A
document naming none is journaled byte for byte as every earlier version
wrote it (`no_new_fields_journals_byte_for_byte`), so the owner's live
books keep working.
- All of it is behind `documents_v2` (B-27): a write that names one waits
for the owner's upgrade, refused with `format_upgrade_pending` and
journaling nothing; a write that names none never waits
(`documents_v2_waits_for_the_upgrade`).
- `invoicing.first_number` is settable only while no numbered invoice
exists (A-2, B-40): the series has begun, and a number is never reused or
renumbered. Refused at `set_setting`, before anything is journaled.
- The issued copy is filed in the issuing call (A-7, B-40 item 3):
`create_invoice_issued` journals the entry, the invoice, then
`receipt.attached` on that entry (`INV-0007.pdf`, `application/pdf`,
"Issued invoice") and `attachment.linked` to the invoice. There is no
`issued_pdf` field: the attachment id is allocated after the entry exists
(CD-A6), and the link is how the copy is found and how its SHA-256 is
checked. Every refusal happens before the first journal line; the PDF's
bytes are stored before it, so a refused issue leaves an unreferenced,
deduplicated blob at worst.
- A preview runs the issue on a clone and journals nothing: the posting,
the total, the number it would take and the due date (`preview_invoice`,
`preview_bill`). Books that haven't upgraded keep the legacy shape: the
copy is filed as "Invoice {id}.pdf" and no number is taken (migration
item 5).
- Schema 16 adds the document columns; a line's new fields ride
`lines_json` as its project does. `differs_from` already compares whole
invoices, bills and parties, so it sees every new field.
8.0.6: (1) `books_written_under_older_rules_still_open` hand-writes both
new document shapes through JournalWriter and still opens; (2) a new
fixture `old-books/p4_s43_documents` was written by main d5385a7e (S4.2,
the version before this slice) through the old-books-writer harness, with
its expected.json; this version opens it and reports the same figures;
(3) see the note on R-A step 4 in the PR (the over-the-wire document write
needs S4.4's arguments; S4.2's invoicing-setting entry already covers the
feature's cut-over); (4) `documents_v2_is_its_own_feature` is green; (5) no
figure moves: no golden changed; (6) merge does not need the owner's
go-ahead; the live books refuse the new writes until he gives it.
just check green (no kernel function, Lean theorem or Ledger command, so no
`just prove` change).
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The format upgrade
- A new version of wanderbooks can keep the books in a newer journal format than the version that wrote them. Books an older version wrote wait for a format upgrade: books.start says so (format_upgrade) and puts it first among its next steps, in every session until it is done.
- Until then they work on their old format: everything that needs nothing new works as before, and whatever would need the new format is refused with format_upgrade_pending, changing nothing. Never retry it, work around it, or post it another way.
- An invoice's or bill's number, payment terms, seller and bill-to, references and memo, a line's account, quantity and unit price, the copy of an invoice kept exactly as it was issued, a party's email and default terms, and the invoicing and bills settings all wait for the documents_v2 upgrade. A document that names none of them is written exactly as before and is never refused; the work that needs one waits, and the books say so.
- Only the owner can agree to the upgrade, with the owner passphrase: in the app, which asks each time it opens the books, or with
wanderbooks books upgrade IDin a terminal. No tool can, and you never ask for, take or type the passphrase. Tell the human, in plain words: the books wait for their go-ahead, what was refused, and that saying no keeps the books working as they are. - Before it upgrades, the server makes a backup of the books, their vault and keys included, and proves it whole; a backup that can't be made or proven upgrades nothing. Then the books move to the new format in one step, on the record.
- After the upgrade an older version of wanderbooks can't open these books; the backup made first keeps them as they were. Going back is the owner's choice, never yours.