legacy params

types/legacy/params.go

@@ -0,0 +1,45 @@
+// Package legacy contains types and interfaces that have support removed, but may need to be exported for legacy
+// and migration purposes.
+package legacy
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+// The following types are from the removed x/params modules and can be used to satisfy
+// legacy interfaces that may use these.
+
+type (
+	ValueValidatorFn func(value interface{}) error
+
+	// ParamSetPair is used for associating paramsubspace key and field of param
+	// structs.
+	ParamSetPair struct {
+		Key         []byte
+		Value       interface{}
+		ValidatorFn ValueValidatorFn
+	}
+)
+
+// NewParamSetPair creates a new ParamSetPair instance.
+func NewParamSetPair(key []byte, value interface{}, vfn ValueValidatorFn) ParamSetPair {
+	return ParamSetPair{key, value, vfn}
+}
+
+// ParamSetPairs Slice of KeyFieldPair
+type ParamSetPairs []ParamSetPair
+
+// ParamSet defines an interface for structs containing parameters for a module
+type ParamSet interface {
+	ParamSetPairs() ParamSetPairs
+}
+
+type (
+	// Subspace defines an interface that implements the legacy x/params Subspace
+	// type.
+	//
+	// NOTE: This is used solely for migration of x/params managed parameters.
+	Subspace interface {
+		GetParamSet(ctx sdk.Context, ps ParamSet)
+	}
+)