About #458 we should agree - will we use self-hosted as it already merged in #450 or continue to use ZCash.

If self-hosted - this PR should be closed. If continue to use ZCash - #450 should be reverted, and #458 should add needed changes in fetch-params.bat also.

p.s. Personally me vote for self-hosted variant.

Our self hosted version is on a VPS right now and may not be able to serve many concurrent downloads. Adding this script till we setup a CDN for these files

Our self hosted version is on a VPS right now and may not be able to serve many concurrent downloads. Adding this script till we setup a CDN for these files

Then we need changes in fetch-params.bat also:

fetch-params.bat.patch

diff --git a/zcutil/fetch-params.bat b/zcutil/fetch-params.bat
index f9e70d481..0b542d28c 100644
--- a/zcutil/fetch-params.bat
+++ b/zcutil/fetch-params.bat
@@ -6,7 +6,7 @@ MKDIR "%APPDATA%"\ZcashParams
 )
 IF NOT EXIST "%APPDATA%"\ZcashParams\sprout-proving.key (
     ECHO Downloading Zcash trusted setup sprout-proving.key, this may take a while ...
-    .\wget64.exe --progress=dot:giga --continue --retry-connrefused --waitretry=3 --timeout=30 https://z.cash/downloads/sprout-proving.key -O "%APPDATA%"\ZcashParams\sprout-proving.key
+    .\wget64.exe --progress=dot:giga --continue --retry-connrefused --waitretry=3 --timeout=30 https://z.cash/downloads/sprout-proving.key.deprecated-sworn-elves -O "%APPDATA%"\ZcashParams\sprout-proving.key
 )
 IF NOT EXIST "%APPDATA%"\ZcashParams\sprout-verifying.key (
     ECHO Downloading Zcash trusted setup sprout-verifying.key, this may take a while ...

And:
VerusCoin.xml.patch

diff --git a/zcutil/VerusCoin.xml b/zcutil/VerusCoin.xml
index 914e2f14b..7e4b39d94 100644
--- a/zcutil/VerusCoin.xml
+++ b/zcutil/VerusCoin.xml
@@ -252,7 +252,7 @@
                     <filename>${windows_folder_appdata}/ZcashParams/sprout-proving.key</filename>
                     <progressText>Zcash Params file: sprout-proving.key</progressText>
                     <showMessageOnError>0</showMessageOnError>
-                    <url>https://z.cash/downloads/sprout-proving.key</url>
+                    <url>https://z.cash/downloads/sprout-proving.key.deprecated-sworn-elves</url>
                 </httpGet>
             </actionList>
             <ruleList>

Please, add the changes above in this PR as well.

add the changes above in this PR as well

done

@DeckerSU are the patches you shared enough or should I also change the rest of the komodoplatform.com strings to z.cash strings in both the ./zcutil/VerusCoin.xml and ./zcutil/fetch-params.bat files?

@DeckerSU are the patches you shared enough or should I also change the rest of the komodoplatform.com strings to z.cash strings in both the ./zcutil/VerusCoin.xml and ./zcutil/fetch-params.bat files?

Depends on what we will do with #457 and #450 , wait for #457 merged and depends on will #450 in #457 will be reverted or not -> update #458.

@DeckerSU @ca333 please review

I removed the fetch-params-zcash.sh file and updated the contents of fetch-params.sh to use the https://z.cash/downloads/sprout-proving.key.deprecated-sworn-elves file

for now all the fetch scripts(including windows ones) use the https://z.cash/downloads/sprout-proving.key.deprecated-sworn-elves file and the usual z.cash urls for the rest

only the fetch-params-alt.sh script uses the selfhosted versions

we can switch all the scripts to self hosted once we have CDN ready for these files

@DeckerSU @ca333 please review

I removed the fetch-params-zcash.sh file and updated the contents of fetch-params.sh to use the https://z.cash/downloads/sprout-proving.key.deprecated-sworn-elves file

for now all the fetch scripts(including windows ones) use the https://z.cash/downloads/sprout-proving.key.deprecated-sworn-elves file and the usual z.cash urls for the rest

only the fetch-params-alt.sh script uses the selfhosted versions

we can switch all the scripts to self hosted once we have CDN ready for these files

sounds good. maybe we should add the corresponding fetch-params-alt.bat ?

Discussing further enhancements - e.g. sprout should not be used anymore, really - thus sprout params requirement removal will come sooner than later.

@ca333 pushed alt script for win