feat: Transaction sender bot

[spalladino]

Adds a new package @aztec/bot that sends txs at regular intervals. The bot idempotently deploys a schnorr account contract and a token contract and mints funds to its own account, and sends a tx with a configurable number of private and public transfers.

Bot can be started via aztec start --bot, either connected to a remote pxe or using a local one, and optionally run within a node. The bot exposes an http control interface when started, so it can be managed like:

curl -XPOST -d'{"method": "bot_getConfig"}' http://localhost:8090
curl -XPOST -d'{"method": "bot_update", "params": [{"txIntervalSeconds": 20}]}' http://localhost:8090
curl -XPOST -d'{"method": "bot_stop"}' http://localhost:8090

A known issue is that running the bot within a non-sandbox node fails with #7537.

Fixes #7562

[AztecBot]

Benchmark results

Metrics with a significant change:

• avm_simulation_time_ms (Token:transfer_public): 38.4 (+35%)
• avm_simulation_time_ms (Token:_increase_public_balance): 152 (+73%)
• avm_simulation_time_ms (FPC:pay_refund_with_shielded_rebate): 67.1 (-49%)
• protocol_circuit_proving_time_in_ms (base-parity): 1,938 (+38%)

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	5,741	1,554	708	753	771 (-1%)
proof_construction_time_sha256_30_ms	11,793 (-1%)	3,168 (-1%)	1,407 (-1%)	1,437	1,463 (-1%)
proof_construction_time_sha256_100_ms	43,966 (-1%)	11,948 (-1%)	5,438 (-1%)	5,353 (-2%)	5,355 (-1%)
proof_construction_time_poseidon_hash_ms	78.0	34.0 (-3%)	34.0	58.0	87.0 (-1%)
proof_construction_time_poseidon_hash_30_ms	1,525	419	202 (+1%)	226 (+2%)	278 (+3%)
proof_construction_time_poseidon_hash_100_ms	5,647	1,527	676 (-1%)	734 (+2%)	751 (-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	708	708	708
l1_rollup_calldata_gas	6,588	6,582	6,576
l1_rollup_execution_gas	583,050	583,195	583,340
l2_block_processing_time_in_ms	762 (-1%)	1,417	2,758 (+2%)
l2_block_building_time_in_ms	10,454 (+2%)	20,026	39,810 (+1%)
l2_block_rollup_simulation_time_in_ms	10,453 (+2%)	20,025	39,810 (+1%)
l2_block_public_tx_process_time_in_ms	8,736 (+2%)	18,118	37,851 (+1%)

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	7,032	10,021 (+1%)
node_database_size_in_bytes	12,701,776	16,896,080
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	93.7	398 (+7%)	21,744	54,085	N/A	N/A	N/A	N/A
private-kernel-inner	171 (+1%)	698 (+9%)	81,209	54,264	N/A	N/A	N/A	N/A
private-kernel-tail	368 (-13%)	871 (+7%)	61,565	62,127	N/A	N/A	N/A	N/A
base-parity	6.51 (+2%)	688 (+8%)	160	96.0	⚠️ 1,938 (+38%)	12,676	3.00	131,072
root-parity	108 (+2%)	109 (-10%)	64,860	96.0	28,000 (-8%)	12,676	3.00	4,194,304
base-rollup	3,269 (+1%)	5,121 (+6%)	181,083	632	40,484 (-6%)	13,476	28.0	4,194,304
root-rollup	154 (+2%)	107 (-12%)	51,261	652	25,228 (-9%)	13,412	26.0	4,194,304
public-kernel-setup	107 (+7%)	2,350	113,048	80,822	15,729 (-12%)	119,428	3,339	2,097,152
public-kernel-app-logic	107 (+2%)	3,361 (+3%)	113,048	80,822	8,804 (-13%)	119,428	3,339	1,048,576
public-kernel-tail	631 (+2%)	25,823 (-1%)	410,181	10,814	62,014 (-6%)	25,860	415	8,388,608
private-kernel-reset-tiny	225	938 (+9%)	77,005	53,954	N/A	N/A	N/A	N/A
private-kernel-tail-to-public	4,910 (+1%)	1,395 (+7%)	773,216	1,632	N/A	N/A	N/A	N/A
public-kernel-teardown	91.3 (+2%)	3,296 (+1%)	113,048	80,822	16,144 (-15%)	119,428	3,339	2,097,152
merge-rollup	57.6	N/A	33,566	632	N/A	N/A	N/A	N/A
undefined	N/A	N/A	N/A	N/A	152,235 (-2%)	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	1,312	9,344	354 (+1%)	N/A	N/A
ContractInstanceDeployer:deploy	1,376	9,344	25.2 (+3%)	N/A	N/A
MultiCallEntrypoint:entrypoint	1,888	9,344	563 (+2%)	N/A	N/A
GasToken:deploy	1,344	9,344	488 (+3%)	N/A	N/A
SchnorrAccount:constructor	1,280	9,344	436 (+3%)	N/A	N/A
SchnorrAccount:entrypoint	2,272	9,344	729 (+1%)	N/A	N/A
Token:privately_mint_private_note	1,248	9,344	531 (+7%)	N/A	N/A
FPC:fee_entrypoint_public	1,312	9,344	102 (+5%)	N/A	N/A
Token:transfer	1,280	9,344	1,321 (+2%)	N/A	N/A
AuthRegistry:set_authorized (avm)	19,222	N/A	N/A	95,392	2,242 (+3%)
FPC:prepare_fee (avm)	22,670	N/A	N/A	95,456	2,347 (+7%)
Token:transfer_public (avm)	55,708	N/A	N/A	95,456	6,235 (+1%)
AuthRegistry:consume (avm)	33,100	N/A	N/A	95,424	2,740 (+3%)
FPC:pay_refund (avm)	27,530	N/A	N/A	95,424	3,537
Benchmarking:create_note	1,312	9,344	426 (+3%)	N/A	N/A
SchnorrAccount:verify_private_authwit	1,248	9,344	42.7 (+4%)	N/A	N/A
Token:unshield	1,344	9,344	1,146	N/A	N/A
FPC:fee_entrypoint_private	1,344	9,344	1,508 (+1%)	N/A	N/A

AVM Simulation

Time to simulate various public functions in the AVM.

Function	time_ms	bytecode_size_in_bytes
GasToken:_increase_public_balance	99.0	13,790
GasToken:set_portal	14.0 (+4%)	3,339
Token:constructor	124 (+1%)	23,692
FPC:constructor	93.4 (+1%)	13,592
GasToken:mint_public	85.0 (+1%)	10,158
Token:mint_public	270 (+10%)	19,034
Token:assert_minter_and_mint	84.4 (+1%)	12,925
AuthRegistry:set_authorized	43.9	7,812
FPC:prepare_fee	295 (+13%)	11,068
Token:transfer_public	⚠️ 38.4 (+35%)	44,012
FPC:pay_refund	75.5 (+6%)	15,961
Benchmarking:increment_balance	995 (+1%)	11,281
Token:_increase_public_balance	⚠️ 152 (+73%)	15,006
FPC:pay_refund_with_shielded_rebate	⚠️ 67.1 (-49%)	17,056

Public DB Access

Time to access various public DBs.

Function	time_ms
get-nullifier-index	0.159 (+1%)

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	10.4 (+1%)	16.9 (+1%)	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	0.603 (+1%)	0.520 (+1%)	N/A	N/A	N/A	N/A	N/A
batch_insert_into_append_only_tree_32_depth_ms	N/A	N/A	48.4 (+1%)	75.9 (-1%)	131 (+1%)	246	471
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	0.494 (+1%)	0.466 (-1%)	0.450	0.445	0.440
batch_insert_into_indexed_tree_20_depth_ms	N/A	N/A	60.2 (+1%)	112 (+1%)	183 (+1%)	354 (+1%)	738 (+7%)
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	0.509 (+1%)	0.503 (+1%)	0.485	0.479 (+1%)	0.507 (+6%)
batch_insert_into_indexed_tree_40_depth_ms	N/A	N/A	73.0 (+1%)	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_count	N/A	N/A	133	N/A	N/A	N/A	N/A
batch_insert_into_indexed_tree_40_depth_hash_ms	N/A	N/A	0.519 (+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	77,362	668,542

Transaction size based on fee payment method

| Metric | |
| - | |

[just-mitch]

How does this wire up to the devnet?

[spalladino]

How does this wire up to the devnet?

I was planning on adding it to the tf templates as a next step!