Cost Estimator

We provide a convenient CLI tool to fetch the RISC-V cycle counts for generating ZKPs for a range of blocks for a given rollup.

Overview

In the root directory, add the following RPCs to your .env file for your rollup:

More details on the RPC requirements can be found in the prerequisites section.

Then run the following command:

just cost-estimator <start_l2_block> <end_l2_block>

This command will split the block range into smaller ranges as if the op-succinct-proposer service was running. It will then fetch the required data for generating the ZKP for each of these ranges, and execute the SP1 range program. Once each program finishes, it will collect the statistics and output the aggregate statistics.

Running the cost estimator for a large block range may be slow on machines with limited network bandwidth to the L2 node. For optimal performance, we recommend using a remote machine with high-speed connectivity to avoid slow witness generation.

Example

On Optimism Sepolia, proving the block range 17664000 to 17664125 (125 blocks) takes 4 range proofs and ~11.1B cycles.

RUST_LOG=info just cost-estimator 17664000 17664125

...Execution Logs...

 +--------------------------------+---------------------------+
| Metric                         | Value                     |
+--------------------------------+---------------------------+
| Batch Start                    |                17,664,125 |
| Batch End                      |                17,664,250 |
| Execution Duration (seconds)   |                       606 |
| Total Instruction Count        |            11,055,051,645 |
| Oracle Verify Cycles           |               832,566,844 |
| Derivation Cycles              |             1,089,859,924 |
| Block Execution Cycles         |             8,959,507,779 |
| Blob Verification Cycles       |               338,156,173 |
| Total SP1 Gas                  |            13,075,527,707 |
| Number of Blocks               |                       126 |
| Number of Transactions         |                       856 |
| Ethereum Gas Used              |               416,711,464 |
| Cycles per Block               |                87,738,505 |
| Cycles per Transaction         |                12,914,779 |
| Transactions per Block         |                         6 |
| Gas Used per Block             |                 3,307,233 |
| Gas Used per Transaction       |                   486,812 |
+--------------------------------+---------------------------+