diff --git a/lib/bindings/http/receiver_binary_1.js b/lib/bindings/http/receiver_binary_1.js
index e7ee1b2..5a64267 100644
--- a/lib/bindings/http/receiver_binary_1.js
+++ b/lib/bindings/http/receiver_binary_1.js
@@ -1,9 +1,15 @@
-const Constants = require("./constants.js");
-const Spec = require("../../specs/spec_1.js");
+const {
+  MIME_JSON,
+  MIME_OCTET_STREAM,
+  ENCODING_BASE64,
+  BINARY_HEADERS_1,
+  HEADER_CONTENT_TYPE,
+  SPEC_V1
+} = require("./constants.js");
 
+const Spec = require("../../specs/spec_1.js");
 const JSONParser = require("../../formats/json/parser.js");
 const Base64Parser = require("../../formats/base64.js");
-
 const BinaryHTTPReceiver = require("./receiver_binary.js");
 
 const {
@@ -11,72 +17,36 @@ const {
   isBase64
 } = require("../../utils/fun.js");
 
-const parserByType = {};
-parserByType[Constants.MIME_JSON] = new JSONParser();
-parserByType[Constants.MIME_OCTET_STREAM] = {
-  parse(payload) { return payload; }
+const parserByType = {
+  [MIME_JSON] : new JSONParser(),
+  [MIME_OCTET_STREAM] : { parse(payload) { return payload; } }
 };
 
-const parsersByEncoding = {};
-parsersByEncoding.null = parserByType;
-parsersByEncoding[undefined] = parserByType;
-
-// base64
-parsersByEncoding[Constants.ENCODING_BASE64] = {};
-parsersByEncoding[Constants.ENCODING_BASE64][Constants.MIME_JSON] =
-  new JSONParser(new Base64Parser());
-parsersByEncoding[Constants.ENCODING_BASE64][Constants.MIME_OCTET_STREAM] = {
-  parse(payload) { return payload; }
+const parsersByEncoding = { [null] : parserByType, [undefined] : parserByType, [ENCODING_BASE64] : {} };
+parsersByEncoding[ENCODING_BASE64][MIME_JSON] = new JSONParser(new Base64Parser());
+parsersByEncoding[ENCODING_BASE64][MIME_OCTET_STREAM] = { 
+  parse(payload) { return payload; } 
 };
 
-const allowedContentTypes = [];
-allowedContentTypes.push(Constants.MIME_JSON);
-allowedContentTypes.push(Constants.MIME_OCTET_STREAM);
+const allowedContentTypes = [MIME_JSON, MIME_OCTET_STREAM];
 
-const requiredHeaders = [];
-requiredHeaders.push(Constants.BINARY_HEADERS_1.TYPE);
-requiredHeaders.push(Constants.BINARY_HEADERS_1.SPEC_VERSION);
-requiredHeaders.push(Constants.BINARY_HEADERS_1.SOURCE);
-requiredHeaders.push(Constants.BINARY_HEADERS_1.ID);
+const requiredHeaders = [BINARY_HEADERS_1.TYPE, BINARY_HEADERS_1.SPEC_VERSION, 
+  BINARY_HEADERS_1.SOURCE, BINARY_HEADERS_1.ID];
 
-const setterByHeader = {};
-setterByHeader[Constants.BINARY_HEADERS_1.TYPE] = {
-  name: "type",
-  parser: (v) => v
-};
-setterByHeader[Constants.BINARY_HEADERS_1.SPEC_VERSION] = {
-  name: "specversion",
-  parser: () => "1.0"
-};
-setterByHeader[Constants.BINARY_HEADERS_1.SOURCE] = {
-  name: "source",
-  parser: (v) => v
-};
-setterByHeader[Constants.BINARY_HEADERS_1.ID] = {
-  name: "id",
-  parser: (v) => v
-};
-setterByHeader[Constants.BINARY_HEADERS_1.TIME] = {
-  name: "time",
-  parser: (v) => new Date(Date.parse(v))
-};
-setterByHeader[Constants.BINARY_HEADERS_1.DATA_SCHEMA] = {
-  name: "dataschema",
-  parser: (v) => v
-};
-setterByHeader[Constants.HEADER_CONTENT_TYPE] = {
-  name: "dataContentType",
-  parser: (v) => v
-};
-setterByHeader[Constants.BINARY_HEADERS_1.SUBJECT] = {
-  name: "subject",
-  parser: (v) => v
+const setterByHeader = {
+  [BINARY_HEADERS_1.TYPE] : { name: "type", parser: (v) => v },
+  [BINARY_HEADERS_1.SPEC_VERSION] : { name: "specversion", parser: () => "1.0" },
+  [BINARY_HEADERS_1.SOURCE] : { name: "source", parser: (v) => v },
+  [BINARY_HEADERS_1.ID] : { name: "id", parser: (v) => v },
+  [BINARY_HEADERS_1.TIME] : { name: "time", parser: (v) => new Date(Date.parse(v)) },
+  [BINARY_HEADERS_1.DATA_SCHEMA] : { name: "dataschema", parser: (v) => v },
+  [HEADER_CONTENT_TYPE] : { name: "dataContentType", parser: (v) => v },
+  [BINARY_HEADERS_1.SUBJECT] : { name: "subject", parser: (v) => v }
 };
 
 // Leaving these in place for now. TODO: fixme
 // eslint-disable-next-line
-function checkDecorator(payload, headers) {
-}
+function checkDecorator(payload, headers) {}
 
 // Leaving this in place for now. TODO: fixme
 // eslint-disable-next-line
@@ -87,8 +57,8 @@ function Receiver(configuration) {
     allowedContentTypes,
     requiredHeaders,
     Spec,
-    Constants.SPEC_V1,
-    Constants.BINARY_HEADERS_1.EXTENSIONS_PREFIX,
+    SPEC_V1,
+    BINARY_HEADERS_1.EXTENSIONS_PREFIX,
     checkDecorator
   );
 }