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querier.go
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querier.go
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package keeper
import (
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
abci "github.com/tendermint/tendermint/abci/types"
"github.com/terra-project/core/x/oracle/internal/types"
)
// NewQuerier is the module level router for state queries
func NewQuerier(keeper Keeper) sdk.Querier {
return func(ctx sdk.Context, path []string, req abci.RequestQuery) (res []byte, err sdk.Error) {
switch path[0] {
case types.QueryExchangeRate:
return queryExchangeRate(ctx, req, keeper)
case types.QueryExchangeRates:
return queryExchangeRates(ctx, keeper)
case types.QueryActives:
return queryActives(ctx, keeper)
case types.QueryVotes:
return queryVotes(ctx, req, keeper)
case types.QueryPrevotes:
return queryPrevotes(ctx, req, keeper)
case types.QueryParameters:
return queryParameters(ctx, keeper)
case types.QueryFeederDelegation:
return queryFeederDelegation(ctx, req, keeper)
case types.QueryMissCounter:
return queryMissCounter(ctx, req, keeper)
default:
return nil, sdk.ErrUnknownRequest("unknown oracle query endpoint")
}
}
}
func queryExchangeRate(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
var params types.QueryExchangeRateParams
err := types.ModuleCdc.UnmarshalJSON(req.Data, ¶ms)
if err != nil {
return nil, sdk.ErrUnknownRequest(err.Error())
}
rate, err := keeper.GetLunaExchangeRate(ctx, params.Denom)
if err != nil {
return nil, types.ErrUnknownDenomination(types.DefaultCodespace, params.Denom)
}
bz, err2 := codec.MarshalJSONIndent(keeper.cdc, rate)
if err2 != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err2.Error()))
}
return bz, nil
}
func queryExchangeRates(ctx sdk.Context, keeper Keeper) ([]byte, sdk.Error) {
var rates sdk.DecCoins
keeper.IterateLunaExchangeRates(ctx, func(denom string, rate sdk.Dec) (stop bool) {
rates = append(rates, sdk.NewDecCoinFromDec(denom, rate))
return false
})
bz, err := codec.MarshalJSONIndent(keeper.cdc, rates)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryActives(ctx sdk.Context, keeper Keeper) ([]byte, sdk.Error) {
denoms := []string{}
keeper.IterateLunaExchangeRates(ctx, func(denom string, rate sdk.Dec) (stop bool) {
denoms = append(denoms, denom)
return false
})
bz, err := codec.MarshalJSONIndent(keeper.cdc, denoms)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryVotes(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
var params types.QueryVotesParams
err := keeper.cdc.UnmarshalJSON(req.Data, ¶ms)
if err != nil {
return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
}
filteredVotes := types.ExchangeRateVotes{}
// collects all votes without filter
prefix := types.VoteKey
handler := func(vote types.ExchangeRateVote) (stop bool) {
filteredVotes = append(filteredVotes, vote)
return false
}
// applies filter
if len(params.Denom) != 0 && !params.Voter.Empty() {
prefix = types.GetVoteKey(params.Denom, params.Voter)
} else if len(params.Denom) != 0 {
prefix = types.GetVoteKey(params.Denom, sdk.ValAddress{})
} else if !params.Voter.Empty() {
handler = func(vote types.ExchangeRateVote) (stop bool) {
if vote.Voter.Equals(params.Voter) {
filteredVotes = append(filteredVotes, vote)
}
return false
}
}
keeper.iterateExchangeRateVotesWithPrefix(ctx, prefix, handler)
bz, err := codec.MarshalJSONIndent(keeper.cdc, filteredVotes)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryPrevotes(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
var params types.QueryPrevotesParams
err := keeper.cdc.UnmarshalJSON(req.Data, ¶ms)
if err != nil {
return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
}
filteredPrevotes := types.ExchangeRatePrevotes{}
// collects all prevotes without filter
prefix := types.PrevoteKey
handler := func(prevote types.ExchangeRatePrevote) (stop bool) {
filteredPrevotes = append(filteredPrevotes, prevote)
return false
}
// applies filter
if len(params.Denom) != 0 && !params.Voter.Empty() {
prefix = types.GetExchangeRatePrevoteKey(params.Denom, params.Voter)
} else if len(params.Denom) != 0 {
prefix = types.GetExchangeRatePrevoteKey(params.Denom, sdk.ValAddress{})
} else if !params.Voter.Empty() {
handler = func(prevote types.ExchangeRatePrevote) (stop bool) {
if prevote.Voter.Equals(params.Voter) {
filteredPrevotes = append(filteredPrevotes, prevote)
}
return false
}
}
keeper.iterateExchangeRatePrevotesWithPrefix(ctx, prefix, handler)
bz, err := codec.MarshalJSONIndent(keeper.cdc, filteredPrevotes)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryParameters(ctx sdk.Context, keeper Keeper) ([]byte, sdk.Error) {
bz, err := codec.MarshalJSONIndent(keeper.cdc, keeper.GetParams(ctx))
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryFeederDelegation(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
var params types.QueryFeederDelegationParams
err := keeper.cdc.UnmarshalJSON(req.Data, ¶ms)
if err != nil {
return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
}
delegatee := keeper.GetOracleDelegate(ctx, params.Validator)
bz, err := codec.MarshalJSONIndent(keeper.cdc, delegatee)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}
func queryMissCounter(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, sdk.Error) {
var params types.QueryMissCounterParams
err := keeper.cdc.UnmarshalJSON(req.Data, ¶ms)
if err != nil {
return nil, sdk.ErrUnknownRequest(sdk.AppendMsgToErr("incorrectly formatted request data", err.Error()))
}
missCounter := keeper.GetMissCounter(ctx, params.Validator)
bz, err := codec.MarshalJSONIndent(keeper.cdc, missCounter)
if err != nil {
return nil, sdk.ErrInternal(sdk.AppendMsgToErr("could not marshal result to JSON", err.Error()))
}
return bz, nil
}