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core: lookup txs by block number instead of block hash (#19431)

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* core: lookup txs by block number instead of block hash

Transaction hashes now store a reference to their corresponding
block number as opposed to their hash. In benchmarks this was
shown to reduce storage by over 12 GB.

The main limitation of this approach is that transactions on
non-canonical blocks could never be looked up, however that is
currently not supported.

The database version has been upgraded to version 5 and the
transaction lookup process is backwards-compatible with the
prior two transaction lookup formats prexisting in the
database instance. Tests have been added to ensure this.

* core/rawdb: tiny review nit fixes
This commit is contained in:
Matthew Halpern
2019-04-25 07:24:56 -07:00
committed by Péter Szilágyi
parent 7c91038bff
commit 937417527c
3 changed files with 99 additions and 70 deletions
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5
core/blockchain.go
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@ -90,7 +90,10 @@ const (
// * the `TxHash`, `GasCost`, and `ContractAddress` fields are no longer stored for a receipt
// * the `TxHash`, `GasCost`, and `ContractAddress` fields are computed by looking up the
// receipts' corresponding block
BlockChainVersion uint64 = 5
// - Version 6
// The following incompatible database changes were added:
// * Transaction lookup information stores the corresponding block number instead of block hash
BlockChainVersion uint64 = 6
)
// CacheConfig contains the configuration values for the trie caching/pruning