Split hash library files up.

packages/hash/src.ts/message.ts

@@ -0,0 +1,15 @@
+import { Bytes, concat } from "@ethersproject/bytes";
+import { keccak256 } from "@ethersproject/keccak256";
+import { toUtf8Bytes } from "@ethersproject/strings";
+
+export const messagePrefix = "\x19Ethereum Signed Message:\n";
+
+export function hashMessage(message: Bytes | string): string {
+    if (typeof(message) === "string") { message = toUtf8Bytes(message); }
+    return keccak256(concat([
+        toUtf8Bytes(messagePrefix),
+        toUtf8Bytes(String(message.length)),
+        message
+    ]));
+}
+

packages/hash/src.ts/namehash.ts

@@ -0,0 +1,44 @@
+import { concat, hexlify } from "@ethersproject/bytes";
+import { nameprep, toUtf8Bytes } from "@ethersproject/strings";
+import { keccak256 } from "@ethersproject/keccak256";
+
+import { Logger } from "@ethersproject/logger";
+import { version } from "./_version";
+const logger = new Logger(version);
+
+const Zeros = new Uint8Array(32);
+Zeros.fill(0);
+
+const Partition = new RegExp("^((.*)\\.)?([^.]+)$");
+
+export function isValidName(name: string): boolean {
+    try {
+        const comps = name.split(".");
+        for (let i = 0; i < comps.length; i++) {
+            if (nameprep(comps[i]).length === 0) {
+                throw new Error("empty")
+            }
+        }
+        return true;
+    } catch (error) { }
+    return false;
+}
+
+export function namehash(name: string): string {
+    /* istanbul ignore if */
+    if (typeof(name) !== "string") {
+        logger.throwArgumentError("invalid address - " + String(name), "name", name);
+    }
+
+    let result: string | Uint8Array = Zeros;
+    while (name.length) {
+        const partition = name.match(Partition);
+        const label = toUtf8Bytes(nameprep(partition[3]));
+        result = keccak256(concat([result, keccak256(label)]));
+
+        name = partition[2] || "";
+    }
+
+    return hexlify(result);
+}
+

tsconfig.project.json

@@ -57,12 +57,6 @@
     {
       "path": "./packages/strings"
     },
-    {
-      "path": "./packages/hash"
-    },
-    {
-      "path": "./packages/abi"
-    },
     {
       "path": "./packages/solidity"
     },
@@ -81,6 +75,12 @@
     {
       "path": "./packages/abstract-signer"
     },
+    {
+      "path": "./packages/hash"
+    },
+    {
+      "path": "./packages/abi"
+    },
     {
       "path": "./packages/contracts"
     },