51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
package params
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import (
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"context"
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"fmt"
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errorsmod "cosmossdk.io/errors"
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govtypes "cosmossdk.io/x/gov/types/v1beta1"
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"cosmossdk.io/x/params/keeper"
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"cosmossdk.io/x/params/types/proposal"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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)
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// NewParamChangeProposalHandler creates a new governance Handler for a ParamChangeProposal
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func NewParamChangeProposalHandler(k keeper.Keeper) govtypes.Handler {
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return func(ctx context.Context, content govtypes.Content) error {
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// UnwrapSDKContext makes x/params baseapp compatible only and not server/v2
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// We should investigate if we want to make x/params server/v2 compatible
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sdkCtx := sdk.UnwrapSDKContext(ctx)
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switch c := content.(type) {
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case *proposal.ParameterChangeProposal:
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return handleParameterChangeProposal(sdkCtx, k, c)
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default:
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return errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "unrecognized param proposal content type: %T", c)
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}
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}
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}
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func handleParameterChangeProposal(ctx sdk.Context, k keeper.Keeper, p *proposal.ParameterChangeProposal) error {
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for _, c := range p.Changes {
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ss, ok := k.GetSubspace(c.Subspace)
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if !ok {
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return errorsmod.Wrap(proposal.ErrUnknownSubspace, c.Subspace)
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}
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k.Logger(ctx).Info(
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fmt.Sprintf("attempt to set new parameter value; key: %s, value: %s", c.Key, c.Value),
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)
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if err := ss.Update(ctx, []byte(c.Key), []byte(c.Value)); err != nil {
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return errorsmod.Wrapf(proposal.ErrSettingParameter, "key: %s, value: %s, err: %s", c.Key, c.Value, err.Error())
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}
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}
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return nil
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}
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