94 lines
2.9 KiB
Nim
94 lines
2.9 KiB
Nim
# The point of this file is just to give a little more type-safety
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# and clarity to our use of SecureHexaryTrie, by having distinct
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# types for the big trie containing all the accounts and the little
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# tries containing the storage for an individual account.
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#
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# It's nice to have all the accesses go through "getAccountBytes"
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# rather than just "get" (which is hard to search for). Plus we
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# may want to put in assertions to make sure that the nodes for
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# the account are all present (in stateless mode), etc.
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{.push raises: [].}
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## Re-write of `distinct_tries.nim` to be imported into `accounts_cache.nim`
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## for using new database API.
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##
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import
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std/typetraits,
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eth/common,
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results,
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../core_db
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type
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AccountLedger* = distinct CoreDxAccRef
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StorageLedger* = distinct CoreDxPhkRef
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SomeLedger* = AccountLedger | StorageLedger
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proc rootHash*(t: SomeLedger): Hash256 =
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t.distinctBase.rootVid().hash().expect "SomeLedger/rootHash()"
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proc rootVid*(t: SomeLedger): CoreDbVidRef =
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t.distinctBase.rootVid
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proc init*(
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T: type AccountLedger;
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db: CoreDbRef;
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rootHash: Hash256;
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isPruning = true;
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): T =
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let vid = db.getRoot(rootHash).expect "AccountLedger/getRoot()"
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db.newAccMpt(vid, isPruning).T
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proc init*(
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T: type AccountLedger;
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db: CoreDbRef;
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isPruning = true;
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): T =
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db.newAccMpt(CoreDbVidRef(nil), isPruning).AccountLedger
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proc fetch*(al: AccountLedger; eAddr: EthAddress): Result[CoreDbAccount,void] =
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## Using `fetch()` for trie data retrieval
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al.distinctBase.fetch(eAddr).mapErr(proc(ign: CoreDbErrorRef) = discard)
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proc merge*(al: AccountLedger; eAddr: EthAddress; account: CoreDbAccount) =
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## Using `merge()` for trie data storage
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al.distinctBase.merge(eAddr, account).expect "AccountLedger/merge()"
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proc delete*(al: AccountLedger, eAddr: EthAddress) =
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al.distinctBase.delete(eAddr).expect "AccountLedger/delete()"
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proc init*(
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T: type StorageLedger;
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al: AccountLedger;
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account: CoreDbAccount;
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isPruning = true;
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): T =
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al.distinctBase.parent.newMpt(account.storageVid, isPruning).toPhk.T
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proc init*(T: type StorageLedger; db: CoreDbRef, isPruning = true): T =
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db.newMpt(CoreDbVidRef(nil), isPruning).toPhk.T
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proc fetch*(sl: StorageLedger, slot: UInt256): Result[Blob,void] =
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sl.distinctBase.fetch(slot.toBytesBE).mapErr proc(ign: CoreDbErrorRef)=discard
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proc merge*(sl: StorageLedger, slot: UInt256, value: openArray[byte]) =
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sl.distinctBase.merge(slot.toBytesBE, value).expect "StorageLedger/merge()"
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proc delete*(sl: StorageLedger, slot: UInt256) =
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sl.distinctBase.delete(slot.toBytesBE).expect "StorageLedger/delete()"
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iterator storage*(
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al: AccountLedger;
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account: CoreDbAccount;
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): (Blob,Blob)
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{.gcsafe, raises: [CoreDbApiError].} =
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## For given account, iterate over storage slots
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for (key,val) in al.distinctBase.parent.newMpt(account.storageVid).pairs:
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yield (key,val)
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# End
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