2018-05-23 13:25:56 -07:00
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package slashing
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import (
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"encoding/binary"
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"fmt"
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sdk "github.com/cosmos/cosmos-sdk/types"
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abci "github.com/tendermint/abci/types"
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crypto "github.com/tendermint/go-crypto"
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2018-05-30 20:43:54 -07:00
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tmtypes "github.com/tendermint/tendermint/types"
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2018-05-23 13:25:56 -07:00
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)
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func NewBeginBlocker(sk Keeper) sdk.BeginBlocker {
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return func(ctx sdk.Context, req abci.RequestBeginBlock) abci.ResponseBeginBlock {
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2018-05-28 15:10:52 -07:00
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// Tag the height
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2018-05-23 13:25:56 -07:00
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heightBytes := make([]byte, 8)
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binary.LittleEndian.PutUint64(heightBytes, uint64(req.Header.Height))
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tags := sdk.NewTags("height", heightBytes)
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2018-05-28 15:10:52 -07:00
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// Deal with any equivocation evidence
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2018-05-23 13:25:56 -07:00
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for _, evidence := range req.ByzantineValidators {
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var pk crypto.PubKey
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2018-05-31 13:19:46 -07:00
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sk.cdc.MustUnmarshalBinaryBare(evidence.PubKey, &pk)
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2018-05-30 20:43:54 -07:00
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switch string(evidence.Type) {
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case tmtypes.DUPLICATE_VOTE:
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2018-05-23 13:25:56 -07:00
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sk.handleDoubleSign(ctx, evidence.Height, evidence.Time, pk)
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default:
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ctx.Logger().With("module", "x/slashing").Error(fmt.Sprintf("Ignored unknown evidence type: %s", string(evidence.Type)))
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}
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}
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2018-05-28 15:10:52 -07:00
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// Figure out which validators were absent
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2018-05-28 17:33:01 -07:00
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absent := make(map[crypto.PubKey]struct{})
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2018-05-23 13:25:56 -07:00
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for _, pubkey := range req.AbsentValidators {
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var pk crypto.PubKey
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2018-05-31 13:19:46 -07:00
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sk.cdc.MustUnmarshalBinaryBare(pubkey, &pk)
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2018-05-28 17:33:01 -07:00
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absent[pk] = struct{}{}
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2018-05-23 13:25:56 -07:00
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}
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2018-05-28 15:10:52 -07:00
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// Iterate over all the validators which *should* have signed this block
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2018-05-23 13:25:56 -07:00
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sk.stakeKeeper.IterateValidatorsBonded(ctx, func(_ int64, validator sdk.Validator) (stop bool) {
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pubkey := validator.GetPubKey()
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2018-05-28 23:32:39 -07:00
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present := true
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2018-05-28 17:33:01 -07:00
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if _, ok := absent[pubkey]; ok {
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2018-05-28 23:32:39 -07:00
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present = false
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2018-05-28 17:33:01 -07:00
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}
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2018-05-28 23:32:39 -07:00
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sk.handleValidatorSignature(ctx, pubkey, present)
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2018-05-23 13:25:56 -07:00
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return false
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})
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2018-05-28 15:10:52 -07:00
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// Return the begin block response
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// TODO Return something composable, so other modules can also have BeginBlockers
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// TODO Add some more tags so clients can track slashing events
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2018-05-23 13:25:56 -07:00
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return abci.ResponseBeginBlock{
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Tags: tags.ToKVPairs(),
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}
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}
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}
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