The weight unit is merely a consensus rule detail and is largely
irrelevant for fee-rate calculations and mempool policy rules (e.g. for
package relay and TRUC limits), so there doesn't seem to be any value of
using a granularity that we can't even guarantee to reach exactly
anyway.
Switch to the more natural unit of vsize instead, which simplifies both
the padding implementation and the current tests that take use of this
padding. The rather annoying multiplications by `WITNESS_SCALE_FACTOR`
can then be removed and weird-looking magic numbers like `4004` can be
replaced by numbers that are more connected to actual policy limit
constants from the codebase, e.g. `1001` for exceeding
`TRUC_CHILD_MAX_VSIZE` by one.
This avoids having to convert from BTC to Sats and needs less imports.
Also specify the tx's target size in vsize rather than in weight, which
allows us to specify the fee-rate by a simple multiplication, rather
than having another magic number for it.
Moved `bulk_transaction` into MiniWallet class as `_bulk_tx` private
helper method to be used when the newly added `target_weight` option is
passed to `create_self_transfer*`
fa7db1cbf7 [test] checks descendants limtis for second generation Package descendants (ritickgoenka)
Pull request description:
This PR adds a new functional test to test the new descendant limits for packages that were proposed in #21800.
```
+----------------------+
| |
| M1 |
| ^ ^ |
| M2 ^ |
| . ^ |
| . ^ |
| . ^ |
| . ^ |
| M24 ^ |
| ^ |
| P1 |
| ^ |
| P2 |
| |
+----------------------+
```
This test is for checking a transaction to fail its descendant count limits because of a combination of mempool descendants, package direct descendants, and package indirect descendants.
In this test, P1 has M1 as a mempool ancestor, P2 has no in-mempool ancestors, but when combined P2 has M1 as an ancestor and M1 exceeds descendant_limits (23 in-mempool descendants + 2 in-package descendants, a total of 26 including itself)
ACKs for top commit:
ryanofsky:
Code review ACK fa7db1cbf7. Only were suggested changes since last review: simplifying test and dropping P3 transaction as John suggested, and adding assert_equal I suggested
glozow:
ACK fa7db1cbf7
jnewbery:
ACK fa7db1cbf7
Tree-SHA512: d1eb993550ac8ce31cbe42e17c6522a213ede66970d5d9391f31a116477ab5889fefa6ff2df6ceadd63a28c1be1ad893b0e8e449247e9ade2ca61dc636508d68
