Intergration test setup

Update PR to bitcoin 0.27.1

fee fixup

Author: sanket1729

contrib/test.sh

@@ -49,3 +49,16 @@ if [ "$DO_BENCH" = true ]
 then
     cargo bench --features="unstable compiler"
 fi
+
+# Run Integration tests if told so
+if [ -n "$BITCOINVERSION" ]; then
+    set -e
+    cd integration_test
+    curl https://bitcoincore.org/bin/bitcoin-core-$BITCOINVERSION/bitcoin-$BITCOINVERSION-x86_64-linux-gnu.tar.gz | tar xvzf - bitcoin-$BITCOINVERSION/bin/bitcoind    # will abort if the check fails.
+    sha256sum --check bitcoin-core-$BITCOINVERSION.sha256sum
+    export PATH=$PATH:$(pwd)/bitcoin-$BITCOINVERSION/bin
+    ./run.sh
+    # Cleanups
+    rm -rf bitcoin-$BITCOINVERSION
+    exit 0
+fi

integration_test/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "integration_test"
+version = "0.1.0"
+authors = ["Steven Roose <steven@stevenroose.org>", "Sanket K <sanket1729@gmail.com>"]
+
+[dependencies]
+miniscript = {path = "../"}
+
+# Until 0.26 support is released on rust-bitcoincore-rpc
+bitcoincore-rpc = "0.14.0"
+bitcoin = "0.27.1"
+log = "0.4"

integration_test/bitcoin-core-0.20.0.sha256sum

@@ -0,0 +1 @@
+28f0bffa7aff8e03db0a568420d6a01db115ee95bb07a94fe213074b6e3fc9f9  bitcoin-0.20.0/bin/bitcoind

integration_test/bitcoin-core-22.0.sha256sum

@@ -0,0 +1 @@
+4aebceb3caf83f27bd3dd9030da637bacc836912a65a896860dc0252d0ebfad9  ./bitcoin-22.0/bin/bitcoind

integration_test/run.sh

@@ -0,0 +1,36 @@
+#!/bin/sh
+
+TESTDIR=/tmp/rust_miniscript_test
+
+rm -rf ${TESTDIR}
+mkdir -p ${TESTDIR}/1
+
+# To kill any remaining open bitcoind.
+killall -9 bitcoind
+
+echo $PATH
+
+FALLBACKFEEARG=""
+if bitcoind -version | grep -q -e "v0\.2" -e "v2[2-9]"; then
+    FALLBACKFEEARG="-fallbackfee=0.00001000"
+fi
+
+bitcoind -regtest $FALLBACKFEEARG \
+    -datadir=${TESTDIR}/1 \
+    -rpcport=12348 \
+    -server=1 \
+    -printtoconsole=0 &
+PID1=$!
+
+# Make sure it's listening.
+sleep 3
+
+RPC_URL=http://localhost:12348 \
+    RPC_COOKIE=${TESTDIR}/1/regtest/.cookie \
+    cargo run
+
+RESULT=$?
+
+kill -9 $PID1
+rm -rf ${TESTDIR}
+exit $RESULT

integration_test/src/main.rs

@@ -0,0 +1,7 @@
+//! # rust-miniscript integration test
+//!
+//! This is how some external user would use rust-miniscript
+
+fn main() {
+    ()
+}