From 796c7ee52fe792d22f0bf223e4252dc3bc74b2d5 Mon Sep 17 00:00:00 2001
From: Sean Bowe <ewillbefull@gmail.com>
Date: Mon, 3 Oct 2016 15:58:02 -0600
Subject: [PATCH] Update to `beta2` public parameters, remove
 `regtest`/`testnet3` parameters subdirectories.

---
 src/init.cpp           |  4 ++--
 src/util.cpp           |  1 -
 src/zcbenchmarks.cpp   |  4 ++--
 zcutil/fetch-params.sh | 51 ++++++++++++++++--------------------------
 4 files changed, 23 insertions(+), 37 deletions(-)

diff --git a/src/init.cpp b/src/init.cpp
index 8c7a227b..54d6634a 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -613,8 +613,8 @@ static void ZC_LoadParams()
     struct timeval tv_start, tv_end;
     float elapsed;
 
-    boost::filesystem::path pk_path = ZC_GetParamsDir() / "z9-proving.key";
-    boost::filesystem::path vk_path = ZC_GetParamsDir() / "z9-verifying.key";
+    boost::filesystem::path pk_path = ZC_GetParamsDir() / "beta2-proving.key";
+    boost::filesystem::path vk_path = ZC_GetParamsDir() / "beta2-verifying.key";
 
     pzcashParams = ZCJoinSplit::Unopened();
 
diff --git a/src/util.cpp b/src/util.cpp
index 0b315317..b451b65a 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -478,7 +478,6 @@ const boost::filesystem::path &ZC_GetParamsDir()
         return path;
 
     path = ZC_GetBaseParamsDir();
-    path /= BaseParams().DataDir();
 
     return path;
 }
diff --git a/src/zcbenchmarks.cpp b/src/zcbenchmarks.cpp
index 3a11095c..015b9320 100644
--- a/src/zcbenchmarks.cpp
+++ b/src/zcbenchmarks.cpp
@@ -52,8 +52,8 @@ double benchmark_sleep()
 double benchmark_parameter_loading()
 {
     // FIXME: this is duplicated with the actual loading code
-    boost::filesystem::path pk_path = ZC_GetParamsDir() / "z9-proving.key";
-    boost::filesystem::path vk_path = ZC_GetParamsDir() / "z9-verifying.key";
+    boost::filesystem::path pk_path = ZC_GetParamsDir() / "beta2-proving.key";
+    boost::filesystem::path vk_path = ZC_GetParamsDir() / "beta2-verifying.key";
 
     struct timeval tv_start;
     timer_start(tv_start);
diff --git a/zcutil/fetch-params.sh b/zcutil/fetch-params.sh
index 7a3f7519..055eb3a8 100755
--- a/zcutil/fetch-params.sh
+++ b/zcutil/fetch-params.sh
@@ -4,19 +4,16 @@ set -eu
 
 PARAMS_DIR="$HOME/.zcash-params"
 
-REGTEST_PKEY_NAME='z9-proving.key'
-REGTEST_VKEY_NAME='z9-verifying.key'
-REGTEST_PKEY_URL="https://z.cash/downloads/$REGTEST_PKEY_NAME"
-REGTEST_VKEY_URL="https://z.cash/downloads/$REGTEST_VKEY_NAME"
-REGTEST_DIR="$PARAMS_DIR/regtest"
-
-# This should have the same params as regtest. We use symlinks for now.
-TESTNET3_DIR="$PARAMS_DIR/testnet3"
+BETA2_PKEY_NAME='beta2-proving.key'
+BETA2_VKEY_NAME='beta2-verifying.key'
+BETA2_PKEY_URL="https://z.cash/downloads/$BETA2_PKEY_NAME"
+BETA2_VKEY_URL="https://z.cash/downloads/$BETA2_VKEY_NAME"
 
 function fetch_params {
     local url="$1"
     local output="$2"
     local dlname="${output}.dl"
+    local expectedhash="$3"
 
     if ! [ -f "$output" ]
     then
@@ -27,8 +24,18 @@ function fetch_params {
             --continue \
             "$url"
 
-        # Only after successful download do we update the parameter load path:
-        mv -v "$dlname" "$output"
+        shasum -a 256 --check <<EOF
+$expectedhash  $dlname
+EOF
+
+        # Check the exit code of the shasum command:
+        CHECKSUM_RESULT=$?
+        if [ $CHECKSUM_RESULT -eq 0 ]; then
+            mv -v "$dlname" "$output"
+        else
+           echo "Failed to verify parameter checksums!"
+           exit 1
+        fi
     fi
 }
 
@@ -86,30 +93,10 @@ $README_PATH
 EOF
     fi
 
-    mkdir -p "$REGTEST_DIR"
-
-    fetch_params "$REGTEST_PKEY_URL" "$REGTEST_DIR/$REGTEST_PKEY_NAME"
-    fetch_params "$REGTEST_VKEY_URL" "$REGTEST_DIR/$REGTEST_VKEY_NAME"
-
     cd "$PARAMS_DIR"
 
-    # Now verify their hashes:
-    echo 'Verifying parameter file integrity via sha256sum...'
-    shasum -a 256 --check <<EOF
-226913bbdc48b70834f8e044d194ddb61c8e15329f67cdc6014f4e5ac11a82ab  regtest/$REGTEST_PKEY_NAME
-4c151c562fce2cdee55ac0a0f8bd9454eb69e6a0db9a8443b58b770ec29b37f5  regtest/$REGTEST_VKEY_NAME
-EOF
-    # Check the exit code of the shasum command:
-    CHECKSUM_RESULT=$?
-    if [ $CHECKSUM_RESULT -eq 0 ]; then
-        echo 'Updating testnet3 symlinks to regtest parameters.'
-        mkdir -p "$TESTNET3_DIR"
-        ln -sf "../regtest/$REGTEST_PKEY_NAME" "$TESTNET3_DIR/$REGTEST_PKEY_NAME"
-        ln -sf "../regtest/$REGTEST_VKEY_NAME" "$TESTNET3_DIR/$REGTEST_VKEY_NAME"
-    else
-       exit 1
-    fi
-
+    fetch_params "$BETA2_PKEY_URL" "$PARAMS_DIR/$BETA2_PKEY_NAME" "cca9887becf803c8ca801bc9da8fcba4f5fb3ba13af9d17e8603021a150cb4b7"
+    fetch_params "$BETA2_VKEY_URL" "$PARAMS_DIR/$BETA2_VKEY_NAME" "2faffd2a5e2e67276c3471c48068a0c16f62286d2e4622a733d7cd1f82ffa860"
 }
 
 main