Scaled is a off-chain micro-transactions framework that aims to allow for cheap & fast micro-transactions on top Ethereum L2.
Current implementation of Scaled combines time locked commitments, BLS signatures, and cheap execution of L2s to achieve its aim.
For latest implementation details please refer to following document.
An alternative to BLS version is using SMT (to maintain Account tree that stores user accounts) and fraud proofs to settle time-locked commitments on-chain. You can read details here. Using BLS is preferred over SMT + fraud proofs because of simplicity & better suitability for L2s.
Scaled started as a necessary component for DSE. It aims to be usable as a plugin payment layer by DSE as well as other such applications ~ incentivised p2p CDNs, file transfer, etc.
Typescript package for interacting with Scaled contracts is available here
Table below shows approximate (not the worst case) cost of calling post() fn in StateBLS contract to settle no. of receipts.
L1 Gas cost = 29 Gwei L2 Gas cost = 0.001 Gwei ETH to Usd: 3000
| No. of receipts | L1 Gas Units | L2 Gas units | Total Cost in Wei | Total Cost in USD |
|---|---|---|---|---|
| 10 | 7804 | 1867851 | 282987974076568 | 0.85 |
| 50 | 19324 | 8811425 | 704911534986110 | 2.12 |
| 100 | 33704 | 17562568 | 1231667210256876 | 3.7 |
For more details refer to benchmark.ts