feat: Remove alternate-network and utility shell scripts

- Delete setup_signet.sh (signet workflow, not used in regtest)
- Delete mine_blocks.sh (utility script, not in critical path)
- Delete run_all.sh (orchestrator script, not needed)
- Delete openconf.sh (config viewer, not needed)

backend/script/mine_blocks.sh

@@ -1,28 +0,0 @@
-#!/usr/bin/env bash
-# mine_blocks.sh — Mine N blocks on the custom Signet
-set -euo pipefail
-
-N="${1:-1}"
-source "$HOME/.bitcoin/signet_keys.env"
-
-MINER="/home/renato/Desktop/bitcoin/bitcoin/contrib/signet/miner"
-GRIND="bitcoin-util grind"
-CLI="bitcoin-cli -signet"
-
-CURRENT=$($CLI getblockcount)
-TARGET=$((CURRENT + N))
-echo "Mining $N blocks (from $CURRENT to $TARGET)..."
-
-BLOCK_TIME=$(date +%s)
-for i in $(seq 1 $N); do
-    BLOCK_TIME=$((BLOCK_TIME + 1))
-    $MINER \
-      --cli="bitcoin-cli -rpcwallet=miner" \
-      generate \
-      --grind-cmd="$GRIND" \
-      --address="$MINER_ADDR" \
-      --min-nbits \
-      --set-block-time="$BLOCK_TIME" \
-      2>&1 >/dev/null
-done
-echo "Done. Block height: $($CLI getblockcount)"

backend/script/openconf.sh

@@ -1 +0,0 @@
-code ~/.bitcoin/bitcoin.conf

backend/script/run_all.sh

@@ -1,35 +0,0 @@
-#!/usr/bin/env bash
-# run_all.sh — Setup custom signet and run all 12 vulnerability tests
-set -euo pipefail
-
-cd "$(dirname "$0")"
-
-echo "╔══════════════════════════════════════════════════════════════╗"
-echo "║  Bitcoin Privacy Vulnerability Suite — Full Run             ║"
-echo "╚══════════════════════════════════════════════════════════════╝"
-echo ""
-
-# Step 1: Setup signet (if not already running)
-if bitcoin-cli -signet getblockchaininfo &>/dev/null; then
-    HEIGHT=$(bitcoin-cli -signet getblockcount)
-    echo "✓ Custom Signet already running at block $HEIGHT"
-    
-    # Check wallets exist
-    WALLETS=$(bitcoin-cli -signet listwallets 2>/dev/null)
-    if echo "$WALLETS" | grep -q "alice"; then
-        echo "✓ Wallets already created"
-    else
-        echo "⚠ Wallets not found. Running setup..."
-        bash setup_signet.sh
-    fi
-else
-    echo "Starting custom Signet setup..."
-    bash setup_signet.sh
-fi
-
-echo ""
-echo "Running vulnerability tests..."
-echo ""
-
-# Step 2: Run all tests
-python3 test_vulnerabilities.py "$@"

backend/script/setup_signet.sh

@@ -1,294 +0,0 @@
-#!/usr/bin/env bash
-# =============================================================================
-# setup_signet.sh — Bootstrap a private custom Signet for vulnerability testing
-# =============================================================================
-set -euo pipefail
-
-DATADIR="$HOME/.bitcoin"
-SIGNET_DIR="$DATADIR/signet"
-MINER="/home/renato/Desktop/bitcoin/bitcoin/contrib/signet/miner"
-GRIND="bitcoin-util grind"
-CLI="bitcoin-cli"
-
-echo "============================================"
-echo "  STEP 0: Cleanup previous state"
-echo "============================================"
-bitcoin-cli stop 2>/dev/null || true
-bitcoin-cli -signet stop 2>/dev/null || true
-sleep 3
-
-# Remove old signet data but keep blocks/chainstate for mainnet untouched
-rm -rf "$SIGNET_DIR"
-rm -f "$DATADIR/bitcoin.conf"
-
-echo "============================================"
-echo "  STEP 1: Generate Signet challenge key"
-echo "============================================"
-rm -f "$DATADIR/bitcoin.conf"
-
-# Generate key pair using Python + bitcoin-cli (no wallet needed)
-KEYPAIR=$(python3 -c "
-import hashlib, os, struct
-
-# Generate a random 32-byte private key
-privkey_bytes = os.urandom(32)
-
-# secp256k1 parameters
-P = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F
-A = 0
-B = 7
-Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798
-Gy = 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8
-N = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141
-
-def modinv(a, m):
-    g, x, _ = extended_gcd(a % m, m)
-    return x % m
-
-def extended_gcd(a, b):
-    if a == 0:
-        return b, 0, 1
-    g, x, y = extended_gcd(b % a, a)
-    return g, y - (b // a) * x, x
-
-def point_add(p1, p2):
-    if p1 is None: return p2
-    if p2 is None: return p1
-    x1, y1 = p1
-    x2, y2 = p2
-    if x1 == x2 and y1 != y2:
-        return None
-    if x1 == x2:
-        lam = (3 * x1 * x1 + A) * modinv(2 * y1, P) % P
-    else:
-        lam = (y2 - y1) * modinv(x2 - x1, P) % P
-    x3 = (lam * lam - x1 - x2) % P
-    y3 = (lam * (x1 - x3) - y1) % P
-    return (x3, y3)
-
-def scalar_mult(k, point):
-    result = None
-    addend = point
-    while k:
-        if k & 1:
-            result = point_add(result, addend)
-        addend = point_add(addend, addend)
-        k >>= 1
-    return result
-
-privkey_int = int.from_bytes(privkey_bytes, 'big') % N
-if privkey_int == 0:
-    privkey_int = 1
-privkey_bytes = privkey_int.to_bytes(32, 'big')
-
-pub = scalar_mult(privkey_int, (Gx, Gy))
-pubkey_bytes = b'\x02' + pub[0].to_bytes(32, 'big') if pub[1] % 2 == 0 else b'\x03' + pub[0].to_bytes(32, 'big')
-
-# WIF encode (testnet/signet = 0xEF prefix)
-wif_payload = b'\xef' + privkey_bytes + b'\x01'  # compressed
-checksum = hashlib.sha256(hashlib.sha256(wif_payload).digest()).digest()[:4]
-import base64
-# base58 encoding
-ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
-num = int.from_bytes(wif_payload + checksum, 'big')
-b58 = ''
-while num > 0:
-    num, rem = divmod(num, 58)
-    b58 = ALPHABET[rem] + b58
-for byte in (wif_payload + checksum):
-    if byte == 0:
-        b58 = '1' + b58
-    else:
-        break
-
-print(f'{b58} {pubkey_bytes.hex()}')
-")
-
-PRIVKEY=$(echo "$KEYPAIR" | awk '{print $1}')
-PUBKEY=$(echo "$KEYPAIR" | awk '{print $2}')
-
-# Build 1-of-1 multisig signet challenge: OP_1 <33-byte pubkey> OP_1 OP_CHECKMULTISIG
-SIGNETCHALLENGE="5121${PUBKEY}51ae"
-
-echo ""
-echo ">>> Private key (WIF):  $PRIVKEY"
-echo ">>> Public key:         $PUBKEY"
-echo ">>> Signet challenge:   $SIGNETCHALLENGE"
-echo ""
-
-# Save keys for later use
-cat > "$DATADIR/signet_keys.env" <<EOF
-PRIVKEY=$PRIVKEY
-PUBKEY=$PUBKEY
-SIGNETCHALLENGE=$SIGNETCHALLENGE
-EOF
-
-echo "============================================"
-echo "  STEP 2: Write bitcoin.conf for custom Signet"
-echo "============================================"
-rm -rf "$DATADIR/regtest"
-rm -f "$DATADIR/bitcoin.conf"
-
-cat > "$DATADIR/bitcoin.conf" <<EOF
-signet=1
-[signet]
-daemon=1
-server=1
-txindex=1
-signetchallenge=$SIGNETCHALLENGE
-acceptnonstdtxn=1
-fallbackfee=0.00010
-mintxfee=0.00001
-dustrelayfee=0.00000001
-minrelaytxfee=0.00001
-EOF
-
-echo "Config written to $DATADIR/bitcoin.conf"
-cat "$DATADIR/bitcoin.conf"
-
-echo ""
-echo "============================================"
-echo "  STEP 3: Start custom Signet node"
-echo "============================================"
-bitcoind
-sleep 3
-
-# Wait for RPC
-for i in $(seq 1 30); do
-    if $CLI -signet getblockchaininfo >/dev/null 2>&1; then
-        echo "  Signet node ready"
-        break
-    fi
-    echo "  Waiting for node to start... ($i)"
-    sleep 2
-done
-
-echo "Node info:"
-$CLI -signet getblockchaininfo | python3 -c "
-import sys, json
-d = json.load(sys.stdin)
-print(f'  Chain:  {d[\"chain\"]}')
-print(f'  Blocks: {d[\"blocks\"]}')
-"
-
-echo ""
-echo "============================================"
-echo "  STEP 4: Create wallets"
-echo "============================================"
-WALLETS=("miner" "alice" "bob" "carol" "exchange" "risky")
-
-for w in "${WALLETS[@]}"; do
-    echo -n "  Creating wallet '$w'... "
-    $CLI -signet -named createwallet wallet_name="$w" descriptors=true 2>&1 | grep -o '"name": "[^"]*"' || echo "(exists or loaded)"
-done
-
-echo "  Loaded wallets:"
-$CLI -signet listwallets
-
-echo ""
-echo "============================================"
-echo "  STEP 5: Import Signet challenge key into miner wallet"
-echo "============================================"
-# For descriptor wallets, we need to import with the PRIVATE key in the descriptor
-# Import both combo (for general key use) and multi(1,...) (for signet challenge signing)
-COMBO_INFO=$($CLI -signet getdescriptorinfo "combo($PRIVKEY)")
-COMBO_CHECKSUM=$(echo "$COMBO_INFO" | python3 -c "import sys,json; print(json.load(sys.stdin)['checksum'])")
-COMBO_DESC="combo($PRIVKEY)#$COMBO_CHECKSUM"
-
-MULTI_INFO=$($CLI -signet getdescriptorinfo "multi(1,$PRIVKEY)")
-MULTI_CHECKSUM=$(echo "$MULTI_INFO" | python3 -c "import sys,json; print(json.load(sys.stdin)['checksum'])")
-MULTI_DESC="multi(1,$PRIVKEY)#$MULTI_CHECKSUM"
-
-echo "  Importing combo and multi(1,...) descriptors..."
-
-$CLI -signet -rpcwallet=miner importdescriptors "[{\"desc\": \"$COMBO_DESC\", \"timestamp\": \"now\"}, {\"desc\": \"$MULTI_DESC\", \"timestamp\": \"now\"}]" | python3 -c "
-import sys, json
-r = json.load(sys.stdin)
-for i, item in enumerate(r):
-    s = item.get('success', False)
-    print(f'  Import {i+1} success: {s}')
-    if not s:
-        print(f'  Error: {item.get(\"error\", \"unknown\")}')
-"
-
-echo ""
-echo "============================================"
-echo "  STEP 6: Mine initial blocks (110 blocks)"
-echo "============================================"
-
-MINER_ADDR=$($CLI -signet -rpcwallet=miner getnewaddress "" bech32)
-echo "  Mining to: $MINER_ADDR"
-
-echo "  Mining 110 blocks (this may take a minute)..."
-BLOCK_TIME=$(date +%s)
-for i in $(seq 1 110); do
-    BLOCK_TIME=$((BLOCK_TIME + 1))
-    $MINER \
-      --cli="$CLI -rpcwallet=miner" \
-      generate \
-      --grind-cmd="$GRIND" \
-      --address="$MINER_ADDR" \
-      --min-nbits \
-      --set-block-time="$BLOCK_TIME" \
-      2>&1 >/dev/null
-    if [ $((i % 10)) -eq 0 ]; then
-        echo "    Mined block $i / 110"
-    fi
-done
-
-HEIGHT=$($CLI -signet getblockcount)
-echo "  Block height: $HEIGHT"
-
-echo ""
-echo "============================================"
-echo "  STEP 7: Fund wallets"
-echo "============================================"
-
-MINER_BAL=$($CLI -signet -rpcwallet=miner getbalance)
-echo "  Miner balance: $MINER_BAL BTC"
-
-# Fund each wallet
-for w in alice bob carol exchange risky; do
-    ADDR=$($CLI -signet -rpcwallet=$w getnewaddress "" bech32)
-    TXID=$($CLI -signet -rpcwallet=miner sendtoaddress "$ADDR" 10.0)
-    echo "  Funded $w with 10 BTC (txid: ${TXID:0:16}...)"
-done
-
-echo "  Mining 6 more blocks to confirm funding..."
-BLOCK_TIME=$(($(date +%s) + 200))
-for i in $(seq 1 6); do
-    BLOCK_TIME=$((BLOCK_TIME + 1))
-    $MINER \
-      --cli="$CLI -rpcwallet=miner" \
-      generate \
-      --grind-cmd="$GRIND" \
-      --address="$MINER_ADDR" \
-      --min-nbits \
-      --set-block-time="$BLOCK_TIME" \
-      2>&1 >/dev/null
-done
-
-echo ""
-echo "  Final balances:"
-for w in miner alice bob carol exchange risky; do
-    BAL=$($CLI -signet -rpcwallet=$w getbalance)
-    echo "    $w: $BAL BTC"
-done
-
-echo ""
-echo "============================================"
-echo "  SETUP COMPLETE"
-echo "============================================"
-echo ""
-echo "  Custom Signet is running with:"
-echo "    - 6 wallets (miner, alice, bob, carol, exchange, risky)"
-echo "    - Each funded with 10 BTC"
-echo "    - txindex=1 for historical lookups"
-echo "    - acceptnonstdtxn=1 for dust experiments"
-echo ""
-echo "  Signet keys saved to: $DATADIR/signet_keys.env"
-echo "  To mine more blocks, use: ./mine_blocks.sh <N>"
-echo ""
-
-# Save mining address for later mining
-echo "MINER_ADDR=$MINER_ADDR" >> "$DATADIR/signet_keys.env"