238 lines
6.1 KiB
Bash
Executable File
238 lines
6.1 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
export LC_ALL=C
|
|
set -eu
|
|
|
|
uname_S=$(uname -s 2>/dev/null || echo not)
|
|
|
|
if [ "$uname_S" = "Darwin" ]; then
|
|
PARAMS_DIR="$HOME/Library/Application Support/ZcashParams"
|
|
else
|
|
PARAMS_DIR="$HOME/.zcash-params"
|
|
fi
|
|
|
|
# Commented out because these are unused; see below.
|
|
#SPROUT_PKEY_NAME='sprout-proving.key'
|
|
#SPROUT_VKEY_NAME='sprout-verifying.key'
|
|
SAPLING_SPEND_NAME='sapling-spend.params'
|
|
SAPLING_OUTPUT_NAME='sapling-output.params'
|
|
SAPLING_SPROUT_GROTH16_NAME='sprout-groth16.params'
|
|
DOWNLOAD_URL="https://download.z.cash/downloads"
|
|
IPFS_HASH="/ipfs/QmXRHVGLQBiKwvNq7c2vPxAKz1zRVmMYbmt7G5TQss7tY7"
|
|
|
|
SHA256CMD="$(command -v sha256sum || echo shasum)"
|
|
SHA256ARGS="$(command -v sha256sum >/dev/null || echo '-a 256')"
|
|
|
|
WGETCMD="$(command -v wget || echo '')"
|
|
IPFSCMD="$(command -v ipfs || echo '')"
|
|
CURLCMD="$(command -v curl || echo '')"
|
|
|
|
# fetch methods can be disabled with ZC_DISABLE_SOMETHING=1
|
|
ZC_DISABLE_WGET="${ZC_DISABLE_WGET:-}"
|
|
ZC_DISABLE_IPFS="${ZC_DISABLE_IPFS:-}"
|
|
ZC_DISABLE_CURL="${ZC_DISABLE_CURL:-}"
|
|
|
|
LOCKFILE=/tmp/fetch_params.lock
|
|
|
|
fetch_wget() {
|
|
if [ -z "$WGETCMD" ] || [ -n "$ZC_DISABLE_WGET" ]; then
|
|
return 1
|
|
fi
|
|
|
|
cat <<EOF
|
|
|
|
Retrieving (wget): $DOWNLOAD_URL/$1
|
|
EOF
|
|
|
|
wget \
|
|
--progress=dot:giga \
|
|
--output-document="$2" \
|
|
--continue \
|
|
--retry-connrefused --waitretry=3 --timeout=30 \
|
|
"$DOWNLOAD_URL/$1"
|
|
}
|
|
|
|
fetch_ipfs() {
|
|
if [ -z "$IPFSCMD" ] || [ -n "$ZC_DISABLE_IPFS" ]; then
|
|
return 1
|
|
fi
|
|
|
|
cat <<EOF
|
|
|
|
Retrieving (ipfs): $IPFS_HASH/$1
|
|
EOF
|
|
|
|
ipfs get --output "$2" "$IPFS_HASH/$1"
|
|
}
|
|
|
|
fetch_curl() {
|
|
if [ -z "$CURLCMD" ] || [ -n "$ZC_DISABLE_CURL" ]; then
|
|
return 1
|
|
fi
|
|
|
|
cat <<EOF
|
|
|
|
Retrieving (curl): $DOWNLOAD_URL/$1
|
|
EOF
|
|
|
|
curl \
|
|
--output "$2" \
|
|
-# -L -C - \
|
|
"$DOWNLOAD_URL/$1"
|
|
|
|
}
|
|
|
|
fetch_failure() {
|
|
cat >&2 <<EOF
|
|
|
|
Failed to fetch the Zcash zkSNARK parameters!
|
|
Try installing one of the following programs and make sure you're online:
|
|
|
|
* ipfs
|
|
* wget
|
|
* curl
|
|
|
|
EOF
|
|
exit 1
|
|
}
|
|
|
|
fetch_params() {
|
|
# We only set these variables inside this function,
|
|
# and unset them at the end of the function.
|
|
filename="$1"
|
|
output="$2"
|
|
dlname="${output}.dl"
|
|
expectedhash="$3"
|
|
|
|
if ! [ -f "$output" ]
|
|
then
|
|
for i in 1 2
|
|
do
|
|
for method in wget ipfs curl failure; do
|
|
if "fetch_$method" "${filename}.part.${i}" "${dlname}.part.${i}"; then
|
|
echo "Download of part ${i} successful!"
|
|
break
|
|
fi
|
|
done
|
|
done
|
|
|
|
for i in 1 2
|
|
do
|
|
if ! [ -f "${dlname}.part.${i}" ]
|
|
then
|
|
fetch_failure
|
|
fi
|
|
done
|
|
|
|
cat "${dlname}.part.1" "${dlname}.part.2" > "${dlname}"
|
|
rm "${dlname}.part.1" "${dlname}.part.2"
|
|
|
|
"$SHA256CMD" $SHA256ARGS -c <<EOF
|
|
$expectedhash $dlname
|
|
EOF
|
|
|
|
# Check the exit code of the shasum command:
|
|
CHECKSUM_RESULT=$?
|
|
if [ $CHECKSUM_RESULT -eq 0 ]; then
|
|
mv -v "$dlname" "$output"
|
|
else
|
|
echo "Failed to verify parameter checksums!" >&2
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
unset -v filename
|
|
unset -v output
|
|
unset -v dlname
|
|
unset -v expectedhash
|
|
}
|
|
|
|
# Use flock to prevent parallel execution.
|
|
lock() {
|
|
if [ "$uname_S" = "Darwin" ]; then
|
|
if shlock -f ${LOCKFILE} -p $$; then
|
|
return 0
|
|
else
|
|
return 1
|
|
fi
|
|
else
|
|
# create lock file
|
|
eval "exec 9>$LOCKFILE"
|
|
# acquire the lock
|
|
flock -n 9 \
|
|
&& return 0 \
|
|
|| return 1
|
|
fi
|
|
}
|
|
|
|
exit_locked_error() {
|
|
echo "Only one instance of fetch-params.sh can be run at a time." >&2
|
|
exit 1
|
|
}
|
|
|
|
main() {
|
|
|
|
lock fetch-params.sh \
|
|
|| exit_locked_error
|
|
|
|
cat <<EOF
|
|
Zcash - fetch-params.sh
|
|
|
|
This script will fetch the Zcash zkSNARK parameters and verify their
|
|
integrity with sha256sum.
|
|
|
|
If they already exist locally, it will exit now and do nothing else.
|
|
EOF
|
|
|
|
# Now create PARAMS_DIR and insert a README if necessary:
|
|
if ! [ -d "$PARAMS_DIR" ]
|
|
then
|
|
mkdir -p "$PARAMS_DIR"
|
|
README_PATH="$PARAMS_DIR/README"
|
|
cat >> "$README_PATH" <<EOF
|
|
This directory stores common Zcash zkSNARK parameters. Note that it is
|
|
distinct from the daemon's -datadir argument because the parameters are
|
|
large and may be shared across multiple distinct -datadir's such as when
|
|
setting up test networks.
|
|
EOF
|
|
|
|
# This may be the first time the user's run this script, so give
|
|
# them some info, especially about bandwidth usage:
|
|
cat <<EOF
|
|
The complete parameters are currently just under 1.7GB in size, so plan
|
|
accordingly for your bandwidth constraints. If the Sprout parameters are
|
|
already present the additional Sapling parameters required are just under
|
|
800MB in size. If the files are already present and have the correct
|
|
sha256sum, no networking is used.
|
|
|
|
Creating params directory. For details about this directory, see:
|
|
$README_PATH
|
|
|
|
EOF
|
|
fi
|
|
|
|
cd "$PARAMS_DIR"
|
|
|
|
# Sprout parameters:
|
|
# Commented out because they are unneeded, but we will eventually update
|
|
# this to delete the parameters if possible.
|
|
#fetch_params "$SPROUT_PKEY_NAME" "$PARAMS_DIR/$SPROUT_PKEY_NAME" "8bc20a7f013b2b58970cddd2e7ea028975c88ae7ceb9259a5344a16bc2c0eef7"
|
|
#fetch_params "$SPROUT_VKEY_NAME" "$PARAMS_DIR/$SPROUT_VKEY_NAME" "4bd498dae0aacfd8e98dc306338d017d9c08dd0918ead18172bd0aec2fc5df82"
|
|
|
|
# Sapling parameters:
|
|
fetch_params "$SAPLING_SPEND_NAME" "$PARAMS_DIR/$SAPLING_SPEND_NAME" "8e48ffd23abb3a5fd9c5589204f32d9c31285a04b78096ba40a79b75677efc13"
|
|
fetch_params "$SAPLING_OUTPUT_NAME" "$PARAMS_DIR/$SAPLING_OUTPUT_NAME" "2f0ebbcbb9bb0bcffe95a397e7eba89c29eb4dde6191c339db88570e3f3fb0e4"
|
|
fetch_params "$SAPLING_SPROUT_GROTH16_NAME" "$PARAMS_DIR/$SAPLING_SPROUT_GROTH16_NAME" "b685d700c60328498fbde589c8c7c484c722b788b265b72af448a5bf0ee55b50"
|
|
}
|
|
|
|
if [ "x${1:-}" = 'x--testnet' ]
|
|
then
|
|
echo "NOTE: testnet now uses the mainnet parameters, so the --testnet argument"
|
|
echo "is no longer needed (ignored)"
|
|
echo ""
|
|
fi
|
|
|
|
main
|
|
rm -f $LOCKFILE
|
|
exit 0
|