Request to update RPCs to get cycles of a transaction and a block

[Keith-CY]

Feature Request

1. Add a cycles field in result of get_transaction RPC;
2. Add a cycles field in result of get_block

Is your feature request related to a problem? Please describe.

We're going to add a cycles field on the transaction page and block page of CKB Explorer.

For a single transaction, we can call the dry_run_transaction RPC to get its cycles. However, the dry_run_transaction RPC is for development(estimate cycles to optimize a transaction) but not for data querying.

Besides, when it's a block page, we need to get cycles of all transactions in it to get the cycles of a block so we have to dry run all transactions, which might be infeasible.

After a consultation, we've learned that

All transaction cycles of a block are stored in the ckb full node, but this is an internal data, not exposed through rpc

So I think an extra field cycles could be returned along with the get_transaction and get_block RPCs.

Refs:

• Show bytes and cycles on block and transaction page

Describe the solution you'd like

As mentioned in the Feature Request section

Describe alternatives you've considered

None

[doitian]

Related:

• feat: add rpc estimate_cycles #3669

[zhangsoledad]

#3684