feat: Contract class registerer contract

[spalladino]

Adds contract class registerer canonical contract, and listens to its events from the archiver. This contract is meant for broadcasting the public bytecode of any given contract class. If the public bytecode for a contract class has not been broadcasted, the public kernel should refuse to execute any calls to a contract instance of this class. More info here.

For now the contract assigned to a hardcoded address in the archiver, computed with salt=1. And since event selectors are not yet implemented (all events are emitted with selector 5) uses a magic number for identifying the event, which should be removed later.

Other changes include:

• Add serialization for an arbitrary-sized buffer into a Field array, where each field carries 31 bytes of info of the original buffer.
• Increase the maximum number of args that can be passed (from 512 to 1024) to a Noir private function.
• Introduce a new ContractClassPublic interface that represents a contract class that has info on public functions only, and uses it in the Aztec Node.
• Remove the SerializableContractClass class in favor of serialization functions used only in the archiver.
• Add an endpoint to the Aztec Node for retrieving contract classes.

Pending for future PRs:

• Unhardcode the registerer contract address from the archiver.
• Set up a nicer API for class registration.
• Generalize buffer serialization into field array.
• Add methods for broadcasting private and unconstrained functions.

Fixes #4069
Fixes #4070

[AztecBot]

Benchmark results

Metrics with a significant change:

• note_history_trial_decrypting_time_in_ms (5): 187 (+99%)

Detailed results

All benchmarks are run on txs on the Benchmarking contract on the repository. Each tx consists of a batch call to create_note and increment_balance, which guarantees that each tx has a private call, a nested private call, a public call, and a nested public call, as well as an emitted private note, an unencrypted log, and public storage read and write.

This benchmark source data is available in JSON format on S3 here.

Values are compared against data from master at commit 8569e7c0 and shown if the difference exceeds 1%.

L2 block published to L1

Each column represents the number of txs on an L2 block published to L1.

Metric	8 txs	32 txs	128 txs
l1_rollup_calldata_size_in_bytes	45,636	180,516	720,036
l1_rollup_calldata_gas	222,480	870,288	3,465,780
l1_rollup_execution_gas	314,967	988,028	3,685,437
l2_block_processing_time_in_ms	1,161 (+1%)	4,352 (-1%)	17,291 (+1%)
note_successful_decrypting_time_in_ms	300 (-1%)	981 (+1%)	3,689 (+2%)
note_trial_decrypting_time_in_ms	11.3 (-30%)	108 (+8%)	150 (+7%)
l2_block_building_time_in_ms	17,909 (+1%)	70,515	282,509
l2_block_rollup_simulation_time_in_ms	13,083	51,871	208,121
l2_block_public_tx_process_time_in_ms	4,738 (+2%)	18,568 (+1%)	74,136 (+1%)

L2 chain processing

Each column represents the number of blocks on the L2 chain where each block has 16 txs.

Metric	5 blocks	10 blocks
node_history_sync_time_in_ms	13,859	26,579 (+1%)
note_history_successful_decrypting_time_in_ms	2,597 (+8%)	4,961 (+4%)
note_history_trial_decrypting_time_in_ms	⚠️ 187 (+99%)	205 (+15%)
node_database_size_in_bytes	17,326,160	33,005,648
pxe_database_size_in_bytes	29,923	59,478

Circuits stats

Stats on running time and I/O sizes collected for every circuit run across all benchmarks.

Circuit	circuit_simulation_time_in_ms	circuit_input_size_in_bytes	circuit_output_size_in_bytes
private-kernel-init	310	44,481	26,193
private-kernel-ordering	194 (+1%)	44,513	14,929
base-rollup	1,405	128,970	881
root-rollup	83.1 (+1%)	4,088	677
private-kernel-inner	417	71,640	26,193
public-kernel-private-input	240	32,615	26,193
public-kernel-non-first-iteration	239	32,657	26,193
merge-rollup	7.75 (+2%)	2,608	881

Tree insertion stats

The duration to insert a fixed batch of leaves into each tree type.

Metric	1 leaves	2 leaves	8 leaves	16 leaves	32 leaves	128 leaves	64 leaves	512 leaves	1024 leaves	2048 leaves	8192 leaves
batch_insert_into_append_only_tree_16_depth_ms	10.2	10.7 (-4%)	12.6 (-4%)	17.0	22.7 (-1%)	64.2	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_count	16.9	17.5	23.0	31.6	47.0	143	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_ms	0.594	0.594 (-5%)	0.536 (-4%)	0.524	0.476 (-1%)	0.442	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_32_depth_ms	N/A	N/A	N/A	N/A	N/A	74.8 (+1%)	47.6 (+1%)	239	464 (+1%)	901	3,567
batch_insert_into_append_only_tree_32_depth_hash_count	N/A	N/A	N/A	N/A	N/A	159	96.0	543	1,055	2,079	8,223
batch_insert_into_append_only_tree_32_depth_hash_ms	N/A	N/A	N/A	N/A	N/A	0.461	0.488	0.436	0.433 (+1%)	0.429	0.429
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	N/A	N/A	N/A	104 (+1%)	57.2 (+2%)	357 (+2%)	692 (+1%)	1,363 (-2%)	5,426
batch_insert_into_indexed_tree_20_depth_hash_count	N/A	N/A	N/A	N/A	N/A	197	104	691	1,363	2,707	10,771
batch_insert_into_indexed_tree_20_depth_hash_ms	N/A	N/A	N/A	N/A	N/A	0.494 (+1%)	0.500 (+1%)	0.482 (+1%)	0.474	0.472 (-1%)	0.472
batch_insert_into_indexed_tree_40_depth_ms	N/A	N/A	N/A	56.8 (+1%)	N/A	N/A	N/A	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_count	N/A	N/A	N/A	94.1	N/A	N/A	N/A	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_ms	N/A	N/A	N/A	0.579	N/A	N/A	N/A	N/A	N/A	N/A	N/A

Miscellaneous

Transaction sizes based on how many contracts are deployed in the tx.

Metric	0 deployed contracts	1 deployed contracts
tx_size_in_bytes	15,575	38,031

Transaction processing duration by data writes.

Metric	0 new commitments	1 new commitments
tx_pxe_processing_time_ms	553 (+1%)	1,226 (+1%)

Metric	0 public data writes	1 public data writes
tx_sequencer_processing_time_ms	0.516 (-17%)	578 (+1%)

[alexghr]

Is this link correct? #3590 is fixed.

[spalladino]

Hmph probably not, I'll review on the next PR. Thanks for catching it!

[alexghr]

How would we do this?

[spalladino]

I believe it should be part of the bytecode validation circuit