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feat: Draft v31#4608

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feat: Draft v31#4608
zkzoomer wants to merge 2019 commits intomainfrom
draft-v31

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What ❔

Why ❔

Is this a breaking change?

  • Yes
  • No

Operational changes

Checklist

  • PR title corresponds to the body of PR (we generate changelog entries from PRs).
  • Tests for the changes have been added / updated.
  • Documentation comments have been added / updated.
  • Code has been formatted via zkstack dev fmt and zkstack dev lint.

antonbaliasnikov and others added 10 commits January 30, 2026 17:41
chore: return with_slow()
## What ❔

This is a sister PR to
matter-labs/era-contracts#1985
To run token balance migration tests locally, follow [this
script](https://github.com/matter-labs/zksync-era/tree/sma/refactor-tests/infrastructure/scripts/token_balance_migration.sh)

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## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
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## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
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- [ ] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
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lint`.

---------

Signed-off-by: Danil <deniallugo@gmail.com>
Co-authored-by: Stanislav Breadless <stanislavbezkor@gmail.com>
Co-authored-by: Danil <deniallugo@gmail.com>
Co-authored-by: kelemeno <34402761+kelemeno@users.noreply.github.com>
Co-authored-by: kelemeno <kl@matterlabs.dev>
Co-authored-by: Coffee ☕️ <coffee@coffeebot.dev>
Co-authored-by: zksync-era-bot <147085853+zksync-era-bot@users.noreply.github.com>
Co-authored-by: zksync-era-bot <zksync-era-bot@users.noreply.github.com>
Co-authored-by: bxpana <42230936+bxpana@users.noreply.github.com>
## What ❔

This PR introduces a series of changes to improve the state of CI:
- Fixes migration tests. We now await for unsealed batches with the old
settlement layer to be committed.
- Unifies token balance migration tests into a single file, as well as
some optimizations and fixes.
- Splits the token balance migration command into two: intiate +
finalize.
- Optimizes file locks when migrating to gateway, reduces timeouts by
waiting for finalizing migration to be ready before acquiring a new
lock.
- Removes the migrate token balance step for interop tests by depositing
tokens after migrating to gateway, which effectively skips token
migration, making tests faster.

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## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
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## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
<!-- Any config changes? Any new flags? Any changes to any scripts? -->
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- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.

---------

Co-authored-by: kelemeno <34402761+kelemeno@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: Stanislav Bezkorovainyi <stanislavbezkor@gmail.com>
Co-authored-by: kelemeno <kl@matterlabs.dev>
Co-authored-by: 0xValera <55665573+0xValera@users.noreply.github.com>
## What ❔

This is a sister PR to:
matter-labs/era-contracts#2042

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## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
<!-- The `Why` has to be clear to non-Matter Labs entities running their
own ZK Chain -->
<!-- Example: PR templates ensure PR reviewers, observers, and future
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## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
<!-- Any config changes? Any new flags? Any changes to any scripts? -->
<!-- Please add anything that non-Matter Labs entities running their own
ZK Chain may need to know -->

## Checklist

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- [ ] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [ ] Tests for the changes have been added / updated.
- [ ] Documentation comments have been added / updated.
- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.

---------

Co-authored-by: kelemeno <34402761+kelemeno@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: Stanislav Bezkorovainyi <stanislavbezkor@gmail.com>
Co-authored-by: kelemeno <kl@matterlabs.dev>
Co-authored-by: 0xValera <55665573+0xValera@users.noreply.github.com>
## What ❔

<!-- What are the changes this PR brings about? -->
<!-- Example: This PR adds a PR template to the repo. -->
<!-- (For bigger PRs adding more context is appreciated) -->

## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
<!-- The `Why` has to be clear to non-Matter Labs entities running their
own ZK Chain -->
<!-- Example: PR templates ensure PR reviewers, observers, and future
iterators are in context about the evolution of repos. -->

## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
<!-- Any config changes? Any new flags? Any changes to any scripts? -->
<!-- Please add anything that non-Matter Labs entities running their own
ZK Chain may need to know -->

## Checklist

<!-- Check your PR fulfills the following items. -->
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- [ ] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [ ] Tests for the changes have been added / updated.
- [ ] Documentation comments have been added / updated.
- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.

---------

Co-authored-by: zkzoomer <sergio@zkzoomer.io>
Co-authored-by: kelemeno <34402761+kelemeno@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: kelemeno <kl@matterlabs.dev>
Co-authored-by: 0xValera <55665573+0xValera@users.noreply.github.com>
## What ❔

Sister PR to: matter-labs/era-contracts#2056

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## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
<!-- The `Why` has to be clear to non-Matter Labs entities running their
own ZK Chain -->
<!-- Example: PR templates ensure PR reviewers, observers, and future
iterators are in context about the evolution of repos. -->

## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
<!-- Any config changes? Any new flags? Any changes to any scripts? -->
<!-- Please add anything that non-Matter Labs entities running their own
ZK Chain may need to know -->

## Checklist

<!-- Check your PR fulfills the following items. -->
<!-- For draft PRs check the boxes as you complete them. -->

- [ ] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [ ] Tests for the changes have been added / updated.
- [ ] Documentation comments have been added / updated.
- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.
## What ❔

<!-- What are the changes this PR brings about? -->
<!-- Example: This PR adds a PR template to the repo. -->
<!-- (For bigger PRs adding more context is appreciated) -->

## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
<!-- The `Why` has to be clear to non-Matter Labs entities running their
own ZK Chain -->
<!-- Example: PR templates ensure PR reviewers, observers, and future
iterators are in context about the evolution of repos. -->

## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
<!-- Any config changes? Any new flags? Any changes to any scripts? -->
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ZK Chain may need to know -->

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- [ ] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [ ] Tests for the changes have been added / updated.
- [ ] Documentation comments have been added / updated.
- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.
zkzoomer and others added 18 commits March 6, 2026 19:19
## What ❔

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<!-- Example: This PR adds a PR template to the repo. -->
<!-- (For bigger PRs adding more context is appreciated) -->

## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
<!-- The `Why` has to be clear to non-Matter Labs entities running their
own ZK Chain -->
<!-- Example: PR templates ensure PR reviewers, observers, and future
iterators are in context about the evolution of repos. -->

## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
<!-- Any config changes? Any new flags? Any changes to any scripts? -->
<!-- Please add anything that non-Matter Labs entities running their own
ZK Chain may need to know -->

## Checklist

<!-- Check your PR fulfills the following items. -->
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- [ ] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [ ] Tests for the changes have been added / updated.
- [ ] Documentation comments have been added / updated.
- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.
## What ❔

<!-- What are the changes this PR brings about? -->
<!-- Example: This PR adds a PR template to the repo. -->
<!-- (For bigger PRs adding more context is appreciated) -->

## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
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own ZK Chain -->
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iterators are in context about the evolution of repos. -->

## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
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ZK Chain may need to know -->

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- [ ] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
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- [ ] Documentation comments have been added / updated.
- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.
## What ❔

<!-- What are the changes this PR brings about? -->
<!-- Example: This PR adds a PR template to the repo. -->
<!-- (For bigger PRs adding more context is appreciated) -->

## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
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own ZK Chain -->
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iterators are in context about the evolution of repos. -->

## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
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ZK Chain may need to know -->

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entries from PRs).
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lint`.
## What ❔

Add support for Base Token Holder contract in server.
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## Why ❔

Base tokens have to be minted to the contract at genesis. 
<!-- Why are these changes done? What goal do they contribute to? What
are the principles behind them? -->
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own ZK Chain -->
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## Is this a breaking change?
- [x] Yes
- [ ] No

## Operational changes
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ZK Chain may need to know -->

## Checklist

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- [x] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.

---------

Co-authored-by: zkzoomer <sergio@zkzoomer.io>
Co-authored-by: kelemeno <34402761+kelemeno@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: Stanislav Bezkorovainyi <stanislavbezkor@gmail.com>
## What ❔

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<!-- Example: This PR adds a PR template to the repo. -->
<!-- (For bigger PRs adding more context is appreciated) -->

## Why ❔

<!-- Why are these changes done? What goal do they contribute to? What
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own ZK Chain -->
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iterators are in context about the evolution of repos. -->

## Is this a breaking change?
- [ ] Yes
- [ ] No

## Operational changes
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ZK Chain may need to know -->

## Checklist

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entries from PRs).
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- [ ] Documentation comments have been added / updated.
- [ ] Code has been formatted via `zkstack dev fmt` and `zkstack dev
lint`.
## What ❔

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## Why ❔

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- [ ] Yes
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lint`.
## What ❔

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## Why ❔

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## Is this a breaking change?
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Detected VM performance changes

Benchmark name Est. cycles Change in est. cycles
call_far/legacy 2506474568 +2.8%
deploy_simple_contract/fast 57186031 +13.3%
deploy_simple_contract/fast_no_sigs 54094404 +14.1%
init/fast 17093717 +2.0%
init/fast_no_sigs 17129201 +2.0%
init/legacy 2185444 +3.6%

⚠ Detected differing instruction counts

Benchmark Old count New count
access_memory 4747755 4747803
call_far 319928 320231
decode_shl_sub 4747860 4747908
deploy_simple_contract 15892 16214
event_spam 2558407 2558578
finish_eventful_frames 786338 786611
heap_read_write 4252318 4252394
slot_hash_collision 4748771 4748808
write_and_decode 4748771 4748808

Changes in number of opcodes executed indicate that the gas price of the benchmark has changed, which causes it to run out of gas at a different time.

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