feat(proxy): Add ParamSpec and generated values

Author: smoyer64

pkg/proxy/params.go

@@ -0,0 +1,22 @@
+package proxy
+
+// ParamsSpec contains the "specification" needed to service each JSON-RPC
+// method.
+type ParamsSpec struct {
+	order    []string
+	required map[string]struct{}
+}
+
+// Order returns an ordered list of parameter names which can be used to
+// convert a JSON-RPC "params" value from named parameters to positional
+// parameters.
+func (p *ParamsSpec) Order() []string {
+	return p.order
+}
+
+// Required returns a set of which parameters are required.  For positional
+// parameters, the parameters in this set should be those that are first
+// in the list returned by Order.
+func (p *ParamsSpec) Required() map[string]struct{} {
+	return p.required
+}