mirror of
https://github.com/0glabs/0g-chain.git
synced 2024-12-28 09:15:24 +00:00
89 lines
2.4 KiB
Go
89 lines
2.4 KiB
Go
package keeper
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import (
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"bytes"
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"math/big"
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"sort"
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"github.com/0glabs/0g-chain/x/dasigners/v1/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/ethereum/go-ethereum/crypto"
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abci "github.com/tendermint/tendermint/abci/types"
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)
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type Ballot struct {
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account string
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content []byte
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}
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func (k Keeper) BeginBlock(ctx sdk.Context, _ abci.RequestBeginBlock) {
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epochNumber, err := k.GetEpochNumber(ctx)
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if err != nil {
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k.Logger(ctx).Error("[BeginBlock] cannot get epoch number")
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panic(err)
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}
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params := k.GetParams(ctx)
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expectedEpoch := uint64(ctx.BlockHeight()) / params.EpochBlocks
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if expectedEpoch == epochNumber {
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return
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}
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if expectedEpoch > epochNumber+1 || expectedEpoch < epochNumber {
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panic("block height is not continuous")
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}
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// new epoch
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registrations := []Ballot{}
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k.IterateRegistrations(ctx, expectedEpoch, func(account string, signature []byte) (stop bool) {
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registrations = append(registrations, Ballot{
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account: account,
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content: signature,
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})
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return false
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})
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ballots := []Ballot{}
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tokensPerVote, ok := sdk.NewIntFromString(params.TokensPerVote)
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if !ok {
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panic("failed to load params tokens_per_vote")
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}
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for _, registration := range registrations {
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// get validator
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valAddr, err := sdk.ValAddressFromHex(registration.account)
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if err != nil {
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k.Logger(ctx).Error("[BeginBlock] invalid account")
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continue
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}
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validator, found := k.stakingKeeper.GetValidator(ctx, valAddr)
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if !found {
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continue
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}
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num := validator.Tokens.Quo(sdk.NewInt(1_000_000_000_000_000_000)).Quo(tokensPerVote).Abs().BigInt()
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if num.Cmp(big.NewInt(int64(params.MaxVotes))) > 0 {
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num = big.NewInt(int64(params.MaxVotes))
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}
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content := registration.content
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ballotNum := num.Int64()
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for j := 0; j < int(ballotNum); j += 1 {
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ballots = append(ballots, Ballot{
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account: registration.account,
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content: content,
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})
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content = crypto.Keccak256(content)
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}
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}
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sort.Slice(ballots, func(i, j int) bool {
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return bytes.Compare(ballots[i].content, ballots[j].content) < 0
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})
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chosen := make(map[string]struct{})
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epochSignerSet := types.EpochSignerSet{
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Signers: make([]string, 0),
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}
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for _, ballot := range ballots {
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if _, ok := chosen[ballot.account]; !ok {
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chosen[ballot.account] = struct{}{}
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epochSignerSet.Signers = append(epochSignerSet.Signers, ballot.account)
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}
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}
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// save to store
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k.SetEpochSignerSet(ctx, expectedEpoch, epochSignerSet)
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k.SetEpochNumber(ctx, expectedEpoch)
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}
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