The follow PRs contain the major changes of the first CKB hard fork CKB2021:
- ckb#2756 contains VM related changes, including RFC32, 33, and 34.
- ckb#2798 removes the immature limit on using the header deps, see RFC36.
- ckb#2796 updates network protocols, see RFC36.
- ckb#2715 contains remaining RFCs, RFC28, 29, 30, and 31.
In the old code, the RFCs are referenced by PR numbers. In ckb#2867, they are all renamed to the current RFC numbers allocation. Use the following table to find the correct RFC numbers:
| RFC | Used Numbers | Link to PR |
|---|---|---|
| RFC28 Use Block Timestamp as Start Timestamp in Since | 221 | rfcs#221 |
| RFC29 Allow multiple matches on dep cells via type script hash when these cells have the same data | 222 | rfcs#222 |
| RFC30 Ensure that index is less than length in input since field using epoch. | 223 | rfcs#223 |
| RFC31 Add a variable length field in the block header | 224 | rfcs#224 |
| RFC32 CKB VM version selection | 232, 238 | rfcs#238 |
| RFC33 ckb vm version1 changes | 236 | rfcs#236 |
| RFC34 vm syscalls 2 | 237 | rfcs#237 |
| RFC35 Ckb2021 P2P protocol upgrade | 234 | rfcs#234 |
| RFC36 Remove header deps immature rule | 240 | rfcs#240 |
| RFC37 Ckb2021 overview | 242 | rfcs#242 |
RFC37 is the overview of all the hardfork RFCs.