43 lines
1.3 KiB
Go
43 lines
1.3 KiB
Go
package commands
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import (
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"fmt"
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"github.com/holiman/uint256"
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"github.com/ledgerwatch/erigon/common"
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"github.com/ledgerwatch/erigon/core/state"
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)
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// StorageRangeResult is the result of a debug_storageRangeAt API call.
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type StorageRangeResult struct {
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Storage StorageMap `json:"storage"`
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NextKey *common.Hash `json:"nextKey"` // nil if Storage includes the last key in the trie.
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}
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// StorageMap a map from storage locations to StorageEntry items
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type StorageMap map[common.Hash]StorageEntry
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// StorageEntry an entry in storage of the account
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type StorageEntry struct {
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Key *common.Hash `json:"key"`
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Value common.Hash `json:"value"`
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}
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func StorageRangeAt(stateReader *state.PlainState, contractAddress common.Address, start []byte, maxResult int) (StorageRangeResult, error) {
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result := StorageRangeResult{Storage: StorageMap{}}
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resultCount := 0
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if err := stateReader.ForEachStorage(contractAddress, common.BytesToHash(start), func(key, seckey common.Hash, value uint256.Int) bool {
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if resultCount < maxResult {
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result.Storage[seckey] = StorageEntry{Key: &key, Value: value.Bytes32()}
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} else {
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result.NextKey = &key
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}
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resultCount++
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return resultCount <= maxResult
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}, maxResult+1); err != nil {
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return StorageRangeResult{}, fmt.Errorf("error walking over storage: %w", err)
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}
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return result, nil
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}
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