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historical_info.go
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/
historical_info.go
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package keeper
import (
sdk "github.com/cosmos/cosmos-sdk/types"
sdkstaking "github.com/cosmos/cosmos-sdk/x/staking/types"
"github.com/incubus-network/fanfury-sdk/v2/x/lsnative/staking/types"
)
// GetLiquidStakingHistoricalInfo gets the historical info at a given height
func (k Keeper) GetLiquidStakingHistoricalInfo(ctx sdk.Context, height int64) (types.HistoricalInfo, bool) {
store := ctx.KVStore(k.storeKey)
key := types.GetHistoricalInfoKey(height)
value := store.Get(key)
if value == nil {
return types.HistoricalInfo{}, false
}
return types.MustUnmarshalHistoricalInfo(k.cdc, value), true
}
// GetHistoricalInfo gets the historical info at a given height
func (k Keeper) GetHistoricalInfo(ctx sdk.Context, height int64) (sdkstaking.HistoricalInfo, bool) {
store := ctx.KVStore(k.storeKey)
key := types.GetHistoricalInfoKey(height)
value := store.Get(key)
if value == nil {
return sdkstaking.HistoricalInfo{}, false
}
return sdkstaking.MustUnmarshalHistoricalInfo(k.cdc, value), true
}
// SetHistoricalInfo sets the historical info at a given height
func (k Keeper) SetHistoricalInfo(ctx sdk.Context, height int64, hi *types.HistoricalInfo) {
store := ctx.KVStore(k.storeKey)
key := types.GetHistoricalInfoKey(height)
value := k.cdc.MustMarshal(hi)
store.Set(key, value)
}
// DeleteHistoricalInfo deletes the historical info at a given height
func (k Keeper) DeleteHistoricalInfo(ctx sdk.Context, height int64) {
store := ctx.KVStore(k.storeKey)
key := types.GetHistoricalInfoKey(height)
store.Delete(key)
}
// IterateHistoricalInfo provides an interator over all stored HistoricalInfo
//
// objects. For each HistoricalInfo object, cb will be called. If the cb returns
//
// true, the iterator will close and stop.
func (k Keeper) IterateHistoricalInfo(ctx sdk.Context, cb func(types.HistoricalInfo) bool) {
store := ctx.KVStore(k.storeKey)
iterator := sdk.KVStorePrefixIterator(store, types.HistoricalInfoKey)
defer iterator.Close()
for ; iterator.Valid(); iterator.Next() {
histInfo := types.MustUnmarshalHistoricalInfo(k.cdc, iterator.Value())
if cb(histInfo) {
break
}
}
}
// GetAllHistoricalInfo returns all stored HistoricalInfo objects.
func (k Keeper) GetAllHistoricalInfo(ctx sdk.Context) []types.HistoricalInfo {
var infos []types.HistoricalInfo
k.IterateHistoricalInfo(ctx, func(histInfo types.HistoricalInfo) bool {
infos = append(infos, histInfo)
return false
})
return infos
}
// TrackHistoricalInfo saves the latest historical-info and deletes the oldest
// heights that are below pruning height
func (k Keeper) TrackHistoricalInfo(ctx sdk.Context) {
entryNum := k.HistoricalEntries(ctx)
// Prune store to ensure we only have parameter-defined historical entries.
// In most cases, this will involve removing a single historical entry.
// In the rare scenario when the historical entries gets reduced to a lower value k'
// from the original value k. k - k' entries must be deleted from the store.
// Since the entries to be deleted are always in a continuous range, we can iterate
// over the historical entries starting from the most recent version to be pruned
// and then return at the first empty entry.
for i := ctx.BlockHeight() - int64(entryNum); i >= 0; i-- {
_, found := k.GetHistoricalInfo(ctx, i)
if found {
k.DeleteHistoricalInfo(ctx, i)
} else {
break
}
}
// if there is no need to persist historicalInfo, return
if entryNum == 0 {
return
}
// Create HistoricalInfo struct
lastVals := k.GetLastValidators(ctx)
historicalEntry := types.NewHistoricalInfo(ctx.BlockHeader(), lastVals, k.PowerReduction(ctx))
// Set latest HistoricalInfo at current height
k.SetHistoricalInfo(ctx, ctx.BlockHeight(), &historicalEntry)
}