diff --git a/ext/wasm/api/sqlite3-api-glue.js b/ext/wasm/api/sqlite3-api-glue.js
index 59b40786ec..f1f93da73e 100644
--- a/ext/wasm/api/sqlite3-api-glue.js
+++ b/ext/wasm/api/sqlite3-api-glue.js
@@ -460,6 +460,15 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
                                               (1===n?"":'s')+".");
   };
 
+  /** Code duplication reducer for functions which take an encoding
+      argument and require SQLITE_UTF8.  Sets the db error code to
+      SQLITE_FORMAT and returns that code. */
+  const __errEncoding = (pDb)=>{
+    return util.sqlite3_wasm_db_error(
+      pDb, capi.SQLITE_FORMAT, "SQLITE_UTF8 is the only supported encoding."
+    );
+  };
+
   if(1){/* Bindings for sqlite3_create_collation() */
 
     const __collationContextKey = (argIndex,argv)=>{
@@ -495,7 +504,8 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
           them.
 
        2) It returns capi.SQLITE_FORMAT if the 3rd argument is not
-          capi.SQLITE_UTF8. No other encodings are supported.
+          capi.SQLITE_UTF8. No other encodings are supported. To simplify
+          usage, any falsy value of eTextRep is treated as SQLITE_UTF8.
 
        Returns 0 on success, non-0 on error, in which case the error
        state of pDb (of type `sqlite3*` or argument-convertible to it)
@@ -503,10 +513,10 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     */
     capi.sqlite3_create_collation_v2 = function(pDb,zName,eTextRep,pArg,xCompare,xDestroy){
       if(6!==arguments.length) return __dbArgcMismatch(pDb, 'sqlite3_create_collation_v2', 6);
-      else if(capi.SQLITE_UTF8!==eTextRep){
-        return util.sqlite3_wasm_db_error(
-          pDb, capi.SQLITE_FORMAT, "SQLITE_UTF8 is the only supported encoding."
-        );
+      else if(!eTextRep){
+        eTextRep = capi.SQLITE_UTF8;
+      }else if(capi.SQLITE_UTF8!==eTextRep){
+        return __errEncoding(pDb);
       }
       let rc, pfCompare, pfDestroy;
      try{
@@ -580,6 +590,7 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
        "int"/*eTextRep*/, "*"/*pApp*/,
        "*"/*xStep*/,"*"/*xFinal*/, "*"/*xValue*/, "*"/*xDestroy*/]
     );
+    // TODO: reimplement these using FuncPtrAdapter.
     const sqlite3CreateWindowFunction = wasm.xWrap(
       "sqlite3_create_window_function", "int",
       ["sqlite3*", "string"/*funcName*/, "int"/*nArg*/,
@@ -657,6 +668,10 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     ){
       if(f.length!==arguments.length){
         return __dbArgcMismatch(pDb,"sqlite3_create_function_v2",f.length);
+      }else if(!eTextRep){
+        eTextRep = capi.SQLITE_UTF8;
+      }else if(capi.SQLITE_UTF8!==eTextRep){
+        return __errEncoding(pDb);
       }
       /* Wrap the callbacks in a WASM-bound functions... */
       const uninstall = [/*funcs to uninstall on error*/];
@@ -698,6 +713,10 @@ self.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     ){
       if(f.length!==arguments.length){
         return __dbArgcMismatch(pDb,"sqlite3_create_window_function",f.length);
+      }else if(!eTextRep){
+        eTextRep = capi.SQLITE_UTF8;
+      }else if(capi.SQLITE_UTF8!==eTextRep){
+        return __errEncoding(pDb);
       }
       /* Wrap the callbacks in a WASM-bound functions... */
       const uninstall = [/*funcs to uninstall on error*/];
diff --git a/ext/wasm/tester1.c-pp.js b/ext/wasm/tester1.c-pp.js
index eb014d7b51..a285f8d4f5 100644
--- a/ext/wasm/tester1.c-pp.js
+++ b/ext/wasm/tester1.c-pp.js
@@ -1650,6 +1650,19 @@ self.sqlite3InitModule = sqlite3InitModule;
           assert(2 === blobRc.length);
         //debug("blobRc=",blobRc);
         T.assert(0x68==blobRc[0] && 0x69==blobRc[1]);
+
+        let rc = sqlite3.capi.sqlite3_create_function_v2(
+          this.db, "foo", 0, -1, 0, 0, 0, 0, 0
+        );
+        T.assert(
+          sqlite3.capi.SQLITE_FORMAT === rc,
+          "For invalid eTextRep argument."
+        );
+        rc = sqlite3.capi.sqlite3_create_function_v2(this.db, "foo", 0);
+        T.assert(
+          sqlite3.capi.SQLITE_MISUSE === rc,
+          "For invalid arg count."
+        );
       }
     })
 
@@ -2333,7 +2346,7 @@ self.sqlite3InitModule = sqlite3InitModule;
       T.assert(0===rc).assert(3===collationCounter);
       rc = capi.sqlite3_create_collation(this.db,"hi",capi.SQLITE_UTF8/*not enough args*/);
       T.assert(capi.SQLITE_MISUSE === rc);
-      rc = capi.sqlite3_create_collation_v2(this.db,"hi",0/*wrong encoding*/,0,0,0);
+      rc = capi.sqlite3_create_collation_v2(this.db,"hi",capi.SQLITE_UTF8+1/*invalid encoding*/,0,0,0);
       T.assert(capi.SQLITE_FORMAT === rc)
         .mustThrowMatching(()=>this.db.checkRc(rc),
                            /SQLITE_UTF8 is the only supported encoding./);
diff --git a/manifest b/manifest
index 739632e034..b197045b1a 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sbase64()\sand\sbase85()\sto\sshell\ssources\sfor\sthe\snon-configured\smakefiles,\stoo.
-D 2022-12-23T19:11:57.957
+C Consolidate/unify\show\sthe\sJS\sbindings\sof\sthe\screate_function/collation\sfamily\sof\sfunctions\sreact\sto\sa\snon-UTF8\sencoding:\sthey\snow\streat\sa\sfalsy\svalue\sas\sSQLITE_UTF8\sand\sfail\swith\sSQLITE_FORMAT\sfor\san\sinvalid\sencoding.
+D 2022-12-23T19:16:45.370
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -503,7 +503,7 @@ F ext/wasm/api/post-js-footer.js cd0a8ec768501d9bd45d325ab0442037fb0e33d1f3b4f08
 F ext/wasm/api/post-js-header.js 47b6b281f39ad59fa6e8b658308cd98ea292c286a68407b35ff3ed9cfd281a62
 F ext/wasm/api/pre-js.c-pp.js b88499dc303c21fc3f55f2c364a0f814f587b60a95784303881169f9e91c1d5f
 F ext/wasm/api/sqlite3-api-cleanup.js 680d5ccfff54459db136a49b2199d9f879c8405d9c99af1dda0cc5e7c29056f4
-F ext/wasm/api/sqlite3-api-glue.js 63daa4b9c36faa4c338a32a06eb142869b9ae4885a3e01aad473e1b45357089f
+F ext/wasm/api/sqlite3-api-glue.js 72e63574caaf94aca36b40fa18bd76a267dd43ac6e7b5bd7293bc33ecb52230d
 F ext/wasm/api/sqlite3-api-oo1.js c0c4ccc269cccee657ffd03f094da7e270e1367b7928926b3730d543555a12a6
 F ext/wasm/api/sqlite3-api-prologue.js 1767dfcd94bb4fa9dd4bd9ff6327117783d3656faf1058dcc1369db320d871fc
 F ext/wasm/api/sqlite3-api-worker1.js e94ba98e44afccfa482874cd9acb325883ade50ed1f9f9526beb9de1711f182f
@@ -555,7 +555,7 @@ F ext/wasm/test-opfs-vfs.html 1f2d672f3f3fce810dfd48a8d56914aba22e45c6834e262555
 F ext/wasm/test-opfs-vfs.js f09266873e1a34d9bdb6d3981ec8c9e382f31f215c9fd2f9016d2394b8ae9b7b
 F ext/wasm/tester1-worker.html d43f3c131d88f10d00aff3e328fed13c858d674ea2ff1ff90225506137f85aa9
 F ext/wasm/tester1.c-pp.html d34bef3d48e5cbc1c7c06882ad240fec49bf88f5f65696cc2c72c416933aa406
-F ext/wasm/tester1.c-pp.js 4202e7ec525445386f29612ddf1365348edd1f6002b8b21721c954b9569b756a
+F ext/wasm/tester1.c-pp.js 10db3bd0415d3b39a75db3bfdef2dbabcad8d1168148708bc7f1718b6f36cefd
 F ext/wasm/tests/opfs/concurrency/index.html 86d8ac435074d1e7007b91105f4897f368c165e8cecb6a9aa3d81f5cf5dcbe70
 F ext/wasm/tests/opfs/concurrency/test.js a98016113eaf71e81ddbf71655aa29b0fed9a8b79a3cdd3620d1658eb1cc9a5d
 F ext/wasm/tests/opfs/concurrency/worker.js 0a8c1a3e6ebb38aabbee24f122693f1fb29d599948915c76906681bb7da1d3d2
@@ -2067,8 +2067,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 4bc98a2d9520efa9b80142163cbfab72a5f2fe9854cd6ba8291dcefdb872e657
-R 29c37bd5c082a5ba7585171eea4f1caa
-U larrybr
-Z 2e2497f2640ef121f1aa2ea0415c2016
+P ac136925a6453d3e53c7a380911dfeac5706d49f936294289f6ea0b74e26e18a
+R 9d755119137074f847904c767813a68a
+U stephan
+Z b32b2adc949da16fb78be22c10d5b0a1
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index cf3a045e73..91be7497c9 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-ac136925a6453d3e53c7a380911dfeac5706d49f936294289f6ea0b74e26e18a
\ No newline at end of file
+deffe6fb211410fa1a1fbca824a52b4e09b54d4b4f4a4e12d71c9e4b7e8606fb
\ No newline at end of file