# Cartesi Rollups v2 Gas Report

I've gathered some numbers on the cost of interacting with the Cartesi Rollups v2 contracts on Ethereum Mainnet and Sepolia. The table below contains gas costs and links to the transactions used as reference.

| Action | Gas | Txs |
| :-: | :-: | :-: |
| Send Message L1→L2 | 55K ($0.28) | Mainnet ([#1](https://etherscan.io/tx/0x3ca0470060e3a5cc0a556dadd18ca8852bfa5b4577eab40ca4568a4ab104d464)) |
| Bridge Ether L1→L2 | 68K ($0.34) | Sepolia ([#1](https://sepolia.etherscan.io/tx/0x2a6e280d3ff45487823f59c440de7e493318f829da01ad81d6901f6598083239)) |
| Bridge ERC-20 L1→L2 | 100K ($0.50) | Mainnet ([#1](https://etherscan.io/tx/0xe82b71ba36407d5af900e2554b58fa0326579a1e57c6f09f31a209585553d306)), Sepolia ([#1](https://sepolia.etherscan.io/tx/0x62043e3b8fb832e328c8fc6ea60470d3d365165d79ea88b238aaafc3467e29de), [#2](https://sepolia.etherscan.io/tx/0x2d2179c3789436427736c297e48a399f0918b57523ff8e4015bf91b099873ff7)) |
| Bridge ERC-20 L2→L1 | 123K ($0.62) | Mainnet ([#1](https://etherscan.io/tx/0xb560c6831f1127289c6104d97f8d9e964b2bfea161ee33354dd88c61b0623b16))

- Prices in USD assume a gas price of 2 Gwei and ETH at $2500.
- Gas costs may be higher for longer messages.
- For better gas measurements, we are discarding:
- first-time interactions, due to cold storage writes.
- interactions from multi-sigs, due to signature and threshold checks.