feat: Waku v2 bridge

Issue #12610

vendor/github.com/mitchellh/pointerstructure/README.md

@@ -0,0 +1,102 @@
+# pointerstructure [![GoDoc](https://godoc.org/github.com/mitchellh/pointerstructure?status.svg)](https://godoc.org/github.com/mitchellh/pointerstructure)
+
+pointerstructure is a Go library for identifying a specific value within
+any Go structure using a string syntax.
+
+pointerstructure is based on
+[JSON Pointer (RFC 6901)](https://tools.ietf.org/html/rfc6901), but
+reimplemented for Go.
+
+The goal of pointerstructure is to provide a single, well-known format
+for addressing a specific value. This can be useful for user provided
+input on structures, diffs of structures, etc.
+
+## Features
+
+  * Get the value for an address
+
+  * Set the value for an address within an existing structure
+
+  * Delete the value at an address
+
+  * Sorting a list of addresses
+
+## Installation
+
+Standard `go get`:
+
+```
+$ go get github.com/mitchellh/pointerstructure
+```
+
+## Usage & Example
+
+For usage and examples see the [Godoc](http://godoc.org/github.com/mitchellh/pointerstructure).
+
+A quick code example is shown below:
+
+```go
+complex := map[string]interface{}{
+	"alice": 42,
+	"bob": []interface{}{
+		map[string]interface{}{
+			"name": "Bob",
+		},
+	},
+}
+
+value, err := pointerstructure.Get(complex, "/bob/0/name")
+if err != nil {
+	panic(err)
+}
+
+fmt.Printf("%s", value)
+// Output:
+// Bob
+```
+
+Continuing the example above, you can also set values:
+
+```go
+value, err = pointerstructure.Set(complex, "/bob/0/name", "Alice")
+if err != nil {
+	panic(err)
+}
+
+value, err = pointerstructure.Get(complex, "/bob/0/name")
+if err != nil {
+	panic(err)
+}
+
+fmt.Printf("%s", value)
+// Output:
+// Alice
+```
+
+The library also supports `Get` operations on structs including using the `pointer`
+struct tag to override struct field names:
+
+```go
+	input := struct {
+		Values map[string]interface{} `pointer:"embedded"`
+	}{
+		Values: map[string]interface{}{
+			"alice": 42,
+			"bob": []interface{}{
+				map[string]interface{}{
+					"name": "Bob",
+				},
+			},
+		},
+	}
+
+	value, err := Get(input, "/embedded/bob/0/name")
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("%s", value)
+// Output:
+// Bob
+```
+