fix: Allow txs on block zero

[spalladino]

Fixes #7537

[AztecBot]

Benchmark results

Metrics with a significant change:

• app_circuit_witness_generation_time_in_ms (SchnorrAccount:verify_private_authwit): 37.1 (+35%)
• app_circuit_witness_generation_time_in_ms (Token:unshield): 938 (+48%)
• app_circuit_witness_generation_time_in_ms (FPC:fee_entrypoint_private): 1,148 (+38%)
• avm_simulation_time_ms (Token:transfer_public): 41.8 (+34%)
• avm_simulation_time_ms (Token:_increase_public_balance): 51.6 (+350%)
• protocol_circuit_proving_time_in_ms (public-kernel-app-logic): 10,301 (+19%)
• protocol_circuit_proving_time_in_ms (public-kernel-teardown): 18,716 (+17%)
• protocol_circuit_proving_time_in_ms (public-kernel-tail): 106,585 (+16%)
• app_circuit_proving_time_in_ms (Token:transfer_public (avm)): 10,687 (+16%)

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.

Proof generation

Each column represents the number of threads used in proof generation.

Metric	1 threads	4 threads	16 threads	32 threads	64 threads
proof_construction_time_sha256_ms	5,785	1,558	702 (+1%)	778 (+3%)	783 (+2%)
proof_construction_time_sha256_30_ms	11,911	3,199 (+1%)	1,419	1,452	1,475
proof_construction_time_sha256_100_ms	44,446 (+1%)	12,868 (+4%)	5,800 (+2%)	5,632	5,571 (+1%)
proof_construction_time_poseidon_hash_ms	79.0	34.0	34.0	58.0 (-2%)	87.0 (-1%)
proof_construction_time_poseidon_hash_30_ms	1,534	420	204 (+1%)	225	268 (-4%)
proof_construction_time_poseidon_hash_100_ms	5,673	1,548 (+1%)	684 (+1%)	722 (-2%)	755 (+1%)

L2 block published to L1

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

Metric	4 txs	8 txs	16 txs
l1_rollup_calldata_size_in_bytes	4,324	7,844	14,852
l1_rollup_calldata_gas	49,672	92,466	177,392
l1_rollup_execution_gas	1,294,335	2,042,097	3,869,062
l2_block_processing_time_in_ms	247 (-5%)	445 (-2%)	799 (-2%)
l2_block_building_time_in_ms	9,638 (-1%)	18,963	37,720
l2_block_rollup_simulation_time_in_ms	9,637 (-1%)	18,962	37,719
l2_block_public_tx_process_time_in_ms	8,007 (-1%)	17,090	35,732

L2 chain processing

Each column represents the number of blocks on the L2 chain where each block has 8 txs.

Metric	3 blocks	5 blocks
node_history_sync_time_in_ms	2,982 (+4%)	3,811 (-3%)
node_database_size_in_bytes	12,714,064	16,863,312
pxe_database_size_in_bytes	16,254	26,813

Circuits stats

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

Circuit	simulation_time_in_ms	witness_generation_time_in_ms	input_size_in_bytes	output_size_in_bytes	proving_time_in_ms	proof_size_in_bytes	num_public_inputs	size_in_gates
private-kernel-init	101 (+1%)	388 (-8%)	21,846	44,858	N/A	N/A	N/A	N/A
private-kernel-inner	170 (+1%)	688 (-7%)	72,545	45,005	N/A	N/A	N/A	N/A
private-kernel-tail	669 (-1%)	752 (-4%)	52,710	52,256	N/A	N/A	N/A	N/A
base-parity	6.04 (-2%)	599 (-7%)	160	96.0	1,166 (+8%)	13,188	19.0	65,536
root-parity	109 (-1%)	125 (+11%)	69,084	96.0	30,527 (+13%)	13,188	19.0	4,194,304
base-rollup	2,997	5,659	187,824	664	96,238 (+15%)	14,020	45.0	16,777,216
root-rollup	96.6 (-1%)	118 (+8%)	54,525	716	27,875 (+13%)	13,988	44.0	4,194,304
public-kernel-setup	91.5 (-2%)	2,836 (+4%)	103,782	71,222	17,053 (+14%)	129,220	3,645	2,097,152
public-kernel-app-logic	106 (-1%)	4,099 (+2%)	103,598	71,222	⚠️ 10,301 (+19%)	129,220	3,645	1,048,576
public-kernel-tail	572 (-1%)	28,644 (+10%)	409,190	16,414	⚠️ 106,585 (+16%)	34,308	679	16,777,216
private-kernel-reset-tiny	184 (+2%)	825 (-6%)	68,621	44,750	N/A	N/A	N/A	N/A
private-kernel-tail-to-public	2,718 (+1%)	1,592	931,564	1,697	N/A	N/A	N/A	N/A
public-kernel-teardown	86.4 (-2%)	4,196 (+1%)	104,005	71,222	⚠️ 18,716 (+17%)	129,220	3,645	2,097,152
merge-rollup	59.5 (-2%)	N/A	35,742	664	N/A	N/A	N/A	N/A
undefined	N/A	N/A	N/A	N/A	68,111 (+6%)	N/A	N/A	N/A

Stats on running time collected for app circuits

Function	input_size_in_bytes	output_size_in_bytes	witness_generation_time_in_ms	proof_size_in_bytes	proving_time_in_ms
ContractClassRegisterer:register	1,344	11,731	342 (-1%)	N/A	N/A
ContractInstanceDeployer:deploy	1,408	11,731	19.6 (+8%)	N/A	N/A
MultiCallEntrypoint:entrypoint	1,920	11,731	487 (+2%)	N/A	N/A
FeeJuice:deploy	1,376	11,731	395 (+1%)	N/A	N/A
SchnorrAccount:constructor	1,312	11,731	186 (+5%)	N/A	N/A
SchnorrAccount:entrypoint	2,304	11,731	542 (+1%)	N/A	N/A
Token:privately_mint_private_note	1,280	11,731	225 (+2%)	N/A	N/A
FPC:fee_entrypoint_public	1,344	11,731	23.9 (+1%)	N/A	N/A
Token:transfer	1,312	11,731	426 (+4%)	N/A	N/A
AuthRegistry:set_authorized (avm)	18,491	N/A	N/A	146,400	2,238 (-2%)
FPC:prepare_fee (avm)	22,958	N/A	N/A	146,464	2,570 (-3%)
Token:transfer_public (avm)	61,614	N/A	N/A	146,464	⚠️ 10,687 (+16%)
AuthRegistry:consume (avm)	41,719	N/A	N/A	146,432	5,181 (+6%)
FPC:pay_refund (avm)	26,227	N/A	N/A	146,432	5,015 (+6%)
Benchmarking:create_note	1,344	11,731	170 (+1%)	N/A	N/A
SchnorrAccount:verify_private_authwit	1,280	11,731	⚠️ 37.1 (+35%)	N/A	N/A
Token:unshield	1,376	11,731	⚠️ 938 (+48%)	N/A	N/A
FPC:fee_entrypoint_private	1,376	11,731	⚠️ 1,148 (+38%)	N/A	N/A

AVM Simulation

Time to simulate various public functions in the AVM.

Function	time_ms	bytecode_size_in_bytes
FeeJuice:_increase_public_balance	94.3	8,139
FeeJuice:set_portal	11.8 (+20%)	2,362
Token:constructor	124 (-2%)	31,107
FPC:constructor	93.2 (-10%)	22,380
FeeJuice:mint_public	78.7 (-5%)	6,150
Token:mint_public	82.8 (-13%)	11,720
Token:assert_minter_and_mint	89.4	8,028
AuthRegistry:set_authorized	7.02 (-14%)	4,537
FPC:prepare_fee	268 (-6%)	8,812
Token:transfer_public	⚠️ 41.8 (+34%)	47,374
FPC:pay_refund	59.3 (-2%)	12,114
Benchmarking:increment_balance	1,026	7,450
Token:_increase_public_balance	⚠️ 51.6 (+350%)	8,960
FPC:pay_refund_with_shielded_rebate	138	12,663

Public DB Access

Time to access various public DBs.

Function	time_ms
get-nullifier-index	0.160 (+2%)

Tree insertion stats

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

Metric	1 leaves	16 leaves	64 leaves	128 leaves	256 leaves	512 leaves	1024 leaves
batch_insert_into_append_only_tree_16_depth_ms	2.18 (-1%)	3.81 (-3%)	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_count	16.8	31.7	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_16_depth_hash_ms	0.112 (-1%)	0.107 (-3%)	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_32_depth_ms	N/A	N/A	11.6 (+2%)	17.8 (-1%)	31.3 (+1%)	59.1 (-4%)	111 (-2%)
batch_insert_into_append_only_tree_32_depth_hash_count	N/A	N/A	95.9	159	287	543	1,055
batch_insert_into_append_only_tree_32_depth_hash_ms	N/A	N/A	0.111 (+1%)	0.103 (-1%)	0.101 (+1%)	0.102 (-3%)	0.100 (-1%)
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	14.3 (-2%)	25.3 (-1%)	44.0 (-1%)	82.3 (-3%)	158 (-2%)
batch_insert_into_indexed_tree_20_depth_hash_count	N/A	N/A	109	207	355	691	1,363
batch_insert_into_indexed_tree_20_depth_hash_ms	N/A	N/A	0.108 (-3%)	0.103 (-1%)	0.102 (-4%)	0.102 (-3%)	0.100 (-3%)
batch_insert_into_indexed_tree_40_depth_ms	N/A	N/A	16.4 (-1%)	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_count	N/A	N/A	132	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_ms	N/A	N/A	0.105 (-1%)	N/A	N/A	N/A	N/A

Miscellaneous

Transaction sizes based on how many contract classes are registered in the tx.

Metric	0 registered classes	1 registered classes
tx_size_in_bytes	64,756	668,997

Transaction size based on fee payment method

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