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interface.go
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interface.go
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package wasm
import (
"encoding/json"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
distrkeeper "github.com/cosmos/cosmos-sdk/x/distribution/keeper"
distrtypes "github.com/cosmos/cosmos-sdk/x/distribution/types"
stakingkeeper "github.com/cosmos/cosmos-sdk/x/staking/keeper"
stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
wasmvmtypes "github.com/CosmWasm/wasmvm/types"
wasm "github.com/classic-terra/core/x/wasm/exported"
)
var (
_ wasm.WasmQuerierInterface = Querier{}
_ wasm.WasmMsgParserInterface = MsgParser{}
)
// MsgParser - wasm msg parser for staking msgs
type MsgParser struct{}
// NewWasmMsgParser returns staking wasm msg parser
func NewWasmMsgParser() MsgParser {
return MsgParser{}
}
// Parse implements wasm staking msg parser
func (parser MsgParser) Parse(contractAddr sdk.AccAddress, wasmMsg wasmvmtypes.CosmosMsg) (msgs sdk.Msg, err error) {
msg := wasmMsg.Staking
if msg.Delegate != nil {
validator, err := sdk.ValAddressFromBech32(msg.Delegate.Validator)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, msg.Delegate.Validator)
}
coin, err := wasm.ParseToCoin(msg.Delegate.Amount)
if err != nil {
return nil, err
}
cosmosMsg := stakingtypes.NewMsgDelegate(
contractAddr,
validator,
coin,
)
return cosmosMsg, cosmosMsg.ValidateBasic()
}
if msg.Redelegate != nil {
src, err := sdk.ValAddressFromBech32(msg.Redelegate.SrcValidator)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, msg.Redelegate.SrcValidator)
}
dst, err := sdk.ValAddressFromBech32(msg.Redelegate.DstValidator)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, msg.Redelegate.DstValidator)
}
coin, err := wasm.ParseToCoin(msg.Redelegate.Amount)
if err != nil {
return nil, err
}
cosmosMsg := stakingtypes.NewMsgBeginRedelegate(
contractAddr,
src,
dst,
coin,
)
return cosmosMsg, cosmosMsg.ValidateBasic()
}
if msg.Undelegate != nil {
validator, err := sdk.ValAddressFromBech32(msg.Undelegate.Validator)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, msg.Undelegate.Validator)
}
coin, err := wasm.ParseToCoin(msg.Undelegate.Amount)
if err != nil {
return nil, err
}
cosmosMsg := stakingtypes.NewMsgUndelegate(
contractAddr,
validator,
coin,
)
if err := cosmosMsg.ValidateBasic(); err != nil {
return nil, err
}
return cosmosMsg, nil
}
return nil, sdkerrors.Wrap(wasm.ErrInvalidMsg, "Unknown variant of Staking")
}
// ParseCustom implements custom parser
func (parser MsgParser) ParseCustom(contractAddr sdk.AccAddress, data json.RawMessage) (sdk.Msg, error) {
return nil, nil
}
// Querier - staking query interface for wasm contract
type Querier struct {
stakingKeeper stakingkeeper.Keeper
distrKeeper distrkeeper.Keeper
}
// NewWasmQuerier returns staking wasm querier
func NewWasmQuerier(stakingKeeper stakingkeeper.Keeper, distrKeeper distrkeeper.Keeper) Querier {
return Querier{stakingKeeper, distrKeeper}
}
// Query - implement query function
func (querier Querier) Query(ctx sdk.Context, request wasmvmtypes.QueryRequest) ([]byte, error) {
if request.Staking.BondedDenom != nil {
res := wasmvmtypes.BondedDenomResponse{
Denom: querier.stakingKeeper.BondDenom(ctx),
}
return json.Marshal(res)
}
if request.Staking.AllValidators != nil {
validators := querier.stakingKeeper.GetBondedValidatorsByPower(ctx)
wasmValidators := make([]wasmvmtypes.Validator, len(validators))
for i, v := range validators {
wasmValidators[i] = wasmvmtypes.Validator{
Address: v.OperatorAddress,
Commission: v.Commission.Rate.String(),
MaxCommission: v.Commission.MaxRate.String(),
MaxChangeRate: v.Commission.MaxChangeRate.String(),
}
}
res := wasmvmtypes.AllValidatorsResponse{
Validators: wasmValidators,
}
return json.Marshal(res)
}
if request.Staking.Validator != nil {
validatorAddr, err := sdk.ValAddressFromBech32(request.Staking.Validator.Address)
if err != nil {
return nil, err
}
v, found := querier.stakingKeeper.GetValidator(ctx, validatorAddr)
res := wasmvmtypes.ValidatorResponse{}
if found {
res.Validator = &wasmvmtypes.Validator{
Address: v.OperatorAddress,
Commission: v.Commission.Rate.String(),
MaxCommission: v.Commission.MaxRate.String(),
MaxChangeRate: v.Commission.MaxChangeRate.String(),
}
}
return json.Marshal(res)
}
if request.Staking.AllDelegations != nil {
delegator, err := sdk.AccAddressFromBech32(request.Staking.AllDelegations.Delegator)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, request.Staking.AllDelegations.Delegator)
}
delegations := querier.stakingKeeper.GetAllDelegatorDelegations(ctx, delegator)
responseDelegations, err := querier.encodeDelegations(ctx, delegations)
if err != nil {
return nil, err
}
res := wasmvmtypes.AllDelegationsResponse{
Delegations: responseDelegations,
}
return json.Marshal(res)
}
if request.Staking.Delegation != nil {
delegator, err := sdk.AccAddressFromBech32(request.Staking.Delegation.Delegator)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, request.Staking.Delegation.Delegator)
}
validator, err := sdk.ValAddressFromBech32(request.Staking.Delegation.Validator)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, request.Staking.Delegation.Validator)
}
var responseFullDelegation *wasmvmtypes.FullDelegation
delegation, found := querier.stakingKeeper.GetDelegation(ctx, delegator, validator)
if found {
responseFullDelegation, err = querier.encodeDelegation(ctx, delegation)
if err != nil {
return nil, err
}
}
res := wasmvmtypes.DelegationResponse{
Delegation: responseFullDelegation,
}
return json.Marshal(res)
}
return nil, wasmvmtypes.UnsupportedRequest{Kind: "unknown Staking variant"}
}
// QueryCustom implements custom query interface
func (Querier) QueryCustom(ctx sdk.Context, data json.RawMessage) ([]byte, error) {
return nil, nil
}
// encdoe cosmos delegations to wasm delegations
func (querier Querier) encodeDelegations(ctx sdk.Context, delegations stakingtypes.Delegations) (wasmvmtypes.Delegations, error) {
bondDenom := querier.stakingKeeper.BondDenom(ctx)
var responseDelegations wasmvmtypes.Delegations
for _, del := range delegations {
valAddr, err := sdk.ValAddressFromBech32(del.ValidatorAddress)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, err.Error())
}
val, found := querier.stakingKeeper.GetValidator(ctx, valAddr)
if !found {
return nil, sdkerrors.Wrap(stakingtypes.ErrNoValidatorFound, "can't load validator for delegation")
}
amount := sdk.NewCoin(bondDenom, val.TokensFromShares(del.Shares).TruncateInt())
responseDelegations = append(responseDelegations, wasmvmtypes.Delegation{
Delegator: del.DelegatorAddress,
Validator: del.ValidatorAddress,
Amount: wasm.EncodeSdkCoin(amount),
})
}
return responseDelegations, nil
}
// encode cosmos staking to wasm delegation
func (querier Querier) encodeDelegation(ctx sdk.Context, del stakingtypes.Delegation) (*wasmvmtypes.FullDelegation, error) {
delAddr, err := sdk.AccAddressFromBech32(del.DelegatorAddress)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, err.Error())
}
valAddr, err := sdk.ValAddressFromBech32(del.ValidatorAddress)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, err.Error())
}
val, found := querier.stakingKeeper.GetValidator(ctx, valAddr)
if !found {
return nil, sdkerrors.Wrap(stakingtypes.ErrNoValidatorFound, "can't load validator for delegation")
}
bondDenom := querier.stakingKeeper.BondDenom(ctx)
amount := sdk.NewCoin(bondDenom, val.TokensFromShares(del.Shares).TruncateInt())
delegationCoin := wasm.EncodeSdkCoin(amount)
accumulatedRewards, err := querier.getAccumulatedRewards(ctx, del)
if err != nil {
return nil, err
}
// if this (val, delegate) pair is receiving a redelegation, it cannot redelegate more.
// otherwise, it can redelegate the full amount
redelegateCoin := wasmvmtypes.NewCoin(0, bondDenom)
if !querier.stakingKeeper.HasReceivingRedelegation(ctx, delAddr, valAddr) {
redelegateCoin = delegationCoin
}
return &wasmvmtypes.FullDelegation{
Delegator: del.DelegatorAddress,
Validator: del.ValidatorAddress,
Amount: delegationCoin,
AccumulatedRewards: accumulatedRewards,
CanRedelegate: redelegateCoin,
}, nil
}
func (querier Querier) getAccumulatedRewards(ctx sdk.Context, delegation stakingtypes.Delegation) (wasmvmtypes.Coins, error) {
// Try to get *delegator* reward info!
params := distrtypes.QueryDelegationRewardsRequest{
DelegatorAddress: delegation.DelegatorAddress,
ValidatorAddress: delegation.ValidatorAddress,
}
cache, _ := ctx.CacheContext()
res, err := querier.distrKeeper.DelegationRewards(sdk.WrapSDKContext(cache), ¶ms)
if err != nil {
return nil, err
}
// now we have it, convert it into wasm types
rewards := make(wasmvmtypes.Coins, len(res.Rewards))
for i, r := range res.Rewards {
rewards[i] = wasmvmtypes.Coin{
Denom: r.Denom,
Amount: r.Amount.TruncateInt().String(),
}
}
return rewards, nil
}