131 lines
4.6 KiB
Go
131 lines
4.6 KiB
Go
package keeper
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import (
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/gov/types/v1beta2"
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stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
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)
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// TODO: Break into several smaller functions for clarity
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// Tally iterates over the votes and updates the tally of a proposal based on the voting power of the
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// voters
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func (keeper Keeper) Tally(ctx sdk.Context, proposal v1beta2.Proposal) (passes bool, burnDeposits bool, tallyResults v1beta2.TallyResult) {
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results := make(map[v1beta2.VoteOption]sdk.Dec)
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results[v1beta2.OptionYes] = sdk.ZeroDec()
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results[v1beta2.OptionAbstain] = sdk.ZeroDec()
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results[v1beta2.OptionNo] = sdk.ZeroDec()
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results[v1beta2.OptionNoWithVeto] = sdk.ZeroDec()
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totalVotingPower := sdk.ZeroDec()
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currValidators := make(map[string]v1beta2.ValidatorGovInfo)
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// fetch all the bonded validators, insert them into currValidators
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keeper.sk.IterateBondedValidatorsByPower(ctx, func(index int64, validator stakingtypes.ValidatorI) (stop bool) {
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currValidators[validator.GetOperator().String()] = v1beta2.NewValidatorGovInfo(
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validator.GetOperator(),
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validator.GetBondedTokens(),
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validator.GetDelegatorShares(),
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sdk.ZeroDec(),
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v1beta2.WeightedVoteOptions{},
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)
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return false
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})
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keeper.IterateVotes(ctx, proposal.Id, func(vote v1beta2.Vote) bool {
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// if validator, just record it in the map
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voter, err := sdk.AccAddressFromBech32(vote.Voter)
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if err != nil {
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panic(err)
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}
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valAddrStr := sdk.ValAddress(voter.Bytes()).String()
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if val, ok := currValidators[valAddrStr]; ok {
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val.Vote = vote.Options
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currValidators[valAddrStr] = val
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}
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// iterate over all delegations from voter, deduct from any delegated-to validators
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keeper.sk.IterateDelegations(ctx, voter, func(index int64, delegation stakingtypes.DelegationI) (stop bool) {
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valAddrStr := delegation.GetValidatorAddr().String()
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if val, ok := currValidators[valAddrStr]; ok {
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// There is no need to handle the special case that validator address equal to voter address.
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// Because voter's voting power will tally again even if there will deduct voter's voting power from validator.
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val.DelegatorDeductions = val.DelegatorDeductions.Add(delegation.GetShares())
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currValidators[valAddrStr] = val
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// delegation shares * bonded / total shares
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votingPower := delegation.GetShares().MulInt(val.BondedTokens).Quo(val.DelegatorShares)
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for _, option := range vote.Options {
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weight, _ := sdk.NewDecFromStr(option.Weight)
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subPower := votingPower.Mul(weight)
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results[option.Option] = results[option.Option].Add(subPower)
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}
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totalVotingPower = totalVotingPower.Add(votingPower)
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}
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return false
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})
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keeper.deleteVote(ctx, vote.ProposalId, voter)
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return false
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})
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// iterate over the validators again to tally their voting power
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for _, val := range currValidators {
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if len(val.Vote) == 0 {
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continue
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}
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sharesAfterDeductions := val.DelegatorShares.Sub(val.DelegatorDeductions)
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votingPower := sharesAfterDeductions.MulInt(val.BondedTokens).Quo(val.DelegatorShares)
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for _, option := range val.Vote {
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weight, _ := sdk.NewDecFromStr(option.Weight)
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subPower := votingPower.Mul(weight)
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results[option.Option] = results[option.Option].Add(subPower)
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}
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totalVotingPower = totalVotingPower.Add(votingPower)
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}
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tallyParams := keeper.GetTallyParams(ctx)
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tallyResults = v1beta2.NewTallyResultFromMap(results)
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// TODO: Upgrade the spec to cover all of these cases & remove pseudocode.
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// If there is no staked coins, the proposal fails
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if keeper.sk.TotalBondedTokens(ctx).IsZero() {
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return false, false, tallyResults
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}
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// If there is not enough quorum of votes, the proposal fails
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percentVoting := totalVotingPower.Quo(keeper.sk.TotalBondedTokens(ctx).ToDec())
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quorum, _ := sdk.NewDecFromStr(tallyParams.Quorum)
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if percentVoting.LT(quorum) {
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return false, false, tallyResults
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}
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// If no one votes (everyone abstains), proposal fails
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if totalVotingPower.Sub(results[v1beta2.OptionAbstain]).Equal(sdk.ZeroDec()) {
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return false, false, tallyResults
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}
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// If more than 1/3 of voters veto, proposal fails
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vetoThreshold, _ := sdk.NewDecFromStr(tallyParams.VetoThreshold)
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if results[v1beta2.OptionNoWithVeto].Quo(totalVotingPower).GT(vetoThreshold) {
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return false, true, tallyResults
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}
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// If more than 1/2 of non-abstaining voters vote Yes, proposal passes
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threshold, _ := sdk.NewDecFromStr(tallyParams.Threshold)
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if results[v1beta2.OptionYes].Quo(totalVotingPower.Sub(results[v1beta2.OptionAbstain])).GT(threshold) {
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return true, false, tallyResults
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}
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// If more than 1/2 of non-abstaining voters vote No, proposal fails
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return false, false, tallyResults
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}
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