Branch data Line data Source code
1 : : // Copyright (c) 2019-present The Bitcoin Core developers
2 : : // Distributed under the MIT software license, see the accompanying
3 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 : :
5 : : #include <script/miniscript.h>
6 : :
7 : : #include <primitives/transaction.h>
8 : : #include <script/script.h>
9 : : #include <script/solver.h>
10 : : #include <util/check.h>
11 : : #include <util/vector.h>
12 : :
13 : : #include <limits>
14 : : #include <vector>
15 : :
16 : : namespace miniscript {
17 : : namespace internal {
18 : :
19 : 7366414 : Type SanitizeType(Type e) {
20 [ + + ]: 7366414 : int num_types = (e << "K"_mst) + (e << "V"_mst) + (e << "B"_mst) + (e << "W"_mst);
21 [ + + ]: 7366414 : if (num_types == 0) return ""_mst; // No valid type, don't care about the rest
22 : 7366339 : CHECK_NONFATAL(num_types == 1); // K, V, B, W all conflict with each other
23 [ + + + - ]: 7777538 : CHECK_NONFATAL(!(e << "z"_mst) || !(e << "o"_mst)); // z conflicts with o
24 [ + + + - ]: 14304399 : CHECK_NONFATAL(!(e << "n"_mst) || !(e << "z"_mst)); // n conflicts with z
25 [ + + + - ]: 14304399 : CHECK_NONFATAL(!(e << "n"_mst) || !(e << "W"_mst)); // n conflicts with W
26 [ + + + - ]: 7368554 : CHECK_NONFATAL(!(e << "V"_mst) || !(e << "d"_mst)); // V conflicts with d
27 [ + + + - ]: 7373767 : CHECK_NONFATAL(!(e << "K"_mst) || (e << "u"_mst)); // K implies u
28 [ + + + - ]: 7368554 : CHECK_NONFATAL(!(e << "V"_mst) || !(e << "u"_mst)); // V conflicts with u
29 [ + + + - ]: 14305478 : CHECK_NONFATAL(!(e << "e"_mst) || !(e << "f"_mst)); // e conflicts with f
30 [ + + + - ]: 14305478 : CHECK_NONFATAL(!(e << "e"_mst) || (e << "d"_mst)); // e implies d
31 [ + + + - ]: 7368554 : CHECK_NONFATAL(!(e << "V"_mst) || !(e << "e"_mst)); // V conflicts with e
32 [ + + + - ]: 14306287 : CHECK_NONFATAL(!(e << "d"_mst) || !(e << "f"_mst)); // d conflicts with f
33 [ + + + - ]: 7368554 : CHECK_NONFATAL(!(e << "V"_mst) || (e << "f"_mst)); // V implies f
34 [ + + + - ]: 7373767 : CHECK_NONFATAL(!(e << "K"_mst) || (e << "s"_mst)); // K implies s
35 [ + + + - ]: 7777538 : CHECK_NONFATAL(!(e << "z"_mst) || (e << "m"_mst)); // z implies m
36 : 7366339 : return e;
37 : : }
38 : :
39 : 7366414 : Type ComputeType(Fragment fragment, Type x, Type y, Type z, const std::vector<Type>& sub_types, uint32_t k,
40 : : size_t data_size, size_t n_subs, size_t n_keys, MiniscriptContext ms_ctx) {
41 : : // Sanity check on data
42 [ + + ]: 7366414 : if (fragment == Fragment::SHA256 || fragment == Fragment::HASH256) {
43 : 226 : CHECK_NONFATAL(data_size == 32);
44 [ + + ]: 7366188 : } else if (fragment == Fragment::RIPEMD160 || fragment == Fragment::HASH160) {
45 : 174 : CHECK_NONFATAL(data_size == 20);
46 : : } else {
47 : 7366014 : CHECK_NONFATAL(data_size == 0);
48 : : }
49 : : // Sanity check on k
50 [ + + ]: 7366414 : if (fragment == Fragment::OLDER || fragment == Fragment::AFTER) {
51 : 9420 : CHECK_NONFATAL(k >= 1 && k < 0x80000000UL);
52 [ + + ]: 7356994 : } else if (fragment == Fragment::MULTI || fragment == Fragment::MULTI_A) {
53 [ + - - + ]: 994 : CHECK_NONFATAL(k >= 1 && k <= n_keys);
54 [ + + ]: 7356000 : } else if (fragment == Fragment::THRESH) {
55 [ + - - + ]: 390 : CHECK_NONFATAL(k >= 1 && k <= n_subs);
56 : : } else {
57 : 7355610 : CHECK_NONFATAL(k == 0);
58 : : }
59 : : // Sanity check on subs
60 : 7366414 : if (fragment == Fragment::AND_V || fragment == Fragment::AND_B || fragment == Fragment::OR_B ||
61 [ + + + + ]: 7366414 : fragment == Fragment::OR_C || fragment == Fragment::OR_I || fragment == Fragment::OR_D) {
62 : 9959 : CHECK_NONFATAL(n_subs == 2);
63 [ + + ]: 7356455 : } else if (fragment == Fragment::ANDOR) {
64 : 267 : CHECK_NONFATAL(n_subs == 3);
65 : 7356188 : } else if (fragment == Fragment::WRAP_A || fragment == Fragment::WRAP_S || fragment == Fragment::WRAP_C ||
66 [ + + ]: 7356188 : fragment == Fragment::WRAP_D || fragment == Fragment::WRAP_V || fragment == Fragment::WRAP_J ||
67 : : fragment == Fragment::WRAP_N) {
68 : 7336718 : CHECK_NONFATAL(n_subs == 1);
69 [ + + ]: 19470 : } else if (fragment != Fragment::THRESH) {
70 : 19080 : CHECK_NONFATAL(n_subs == 0);
71 : : }
72 : : // Sanity check on keys
73 [ + + ]: 7366024 : if (fragment == Fragment::PK_K || fragment == Fragment::PK_H) {
74 : 7312 : CHECK_NONFATAL(n_keys == 1);
75 [ + + ]: 7359102 : } else if (fragment == Fragment::MULTI) {
76 : 173 : CHECK_NONFATAL(n_keys >= 1 && n_keys <= MAX_PUBKEYS_PER_MULTISIG);
77 : 173 : CHECK_NONFATAL(!IsTapscript(ms_ctx));
78 [ + + ]: 7358929 : } else if (fragment == Fragment::MULTI_A) {
79 : 821 : CHECK_NONFATAL(n_keys >= 1 && n_keys <= MAX_PUBKEYS_PER_MULTI_A);
80 : 821 : CHECK_NONFATAL(IsTapscript(ms_ctx));
81 : : } else {
82 : 7358108 : CHECK_NONFATAL(n_keys == 0);
83 : : }
84 : :
85 : : // Below is the per-fragment logic for computing the expression types.
86 : : // It heavily relies on Type's << operator (where "X << a_mst" means
87 : : // "X has all properties listed in a").
88 [ + + + + : 7366414 : switch (fragment) {
+ + + + +
+ + + + +
+ + + + +
+ + + + +
+ + + - ]
89 : 6435 : case Fragment::PK_K: return "Konudemsxk"_mst;
90 : 877 : case Fragment::PK_H: return "Knudemsxk"_mst;
91 : 7949 : case Fragment::OLDER: return
92 : 7949 : "g"_mst.If(k & CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG) |
93 [ + + ]: 7949 : "h"_mst.If(!(k & CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG)) |
94 [ + + ]: 15898 : "Bzfmxk"_mst;
95 : 1471 : case Fragment::AFTER: return
96 : 1471 : "i"_mst.If(k >= LOCKTIME_THRESHOLD) |
97 [ + + ]: 1471 : "j"_mst.If(k < LOCKTIME_THRESHOLD) |
98 [ + + ]: 2942 : "Bzfmxk"_mst;
99 : 110 : case Fragment::SHA256: return "Bonudmk"_mst;
100 : 77 : case Fragment::RIPEMD160: return "Bonudmk"_mst;
101 : 116 : case Fragment::HASH256: return "Bonudmk"_mst;
102 : 97 : case Fragment::HASH160: return "Bonudmk"_mst;
103 : 245 : case Fragment::JUST_1: return "Bzufmxk"_mst;
104 : 709 : case Fragment::JUST_0: return "Bzudemsxk"_mst;
105 : 7479 : case Fragment::WRAP_A: return
106 : 7479 : "W"_mst.If(x << "B"_mst) | // W=B_x
107 [ + - ]: 7479 : (x & "ghijk"_mst) | // g=g_x, h=h_x, i=i_x, j=j_x, k=k_x
108 : 14958 : (x & "udfems"_mst) | // u=u_x, d=d_x, f=f_x, e=e_x, m=m_x, s=s_x
109 [ + - ]: 14958 : "x"_mst; // x
110 : 891 : case Fragment::WRAP_S: return
111 : 891 : "W"_mst.If(x << "Bo"_mst) | // W=B_x*o_x
112 [ + - ]: 891 : (x & "ghijk"_mst) | // g=g_x, h=h_x, i=i_x, j=j_x, k=k_x
113 [ + - ]: 1782 : (x & "udfemsx"_mst); // u=u_x, d=d_x, f=f_x, e=e_x, m=m_x, s=s_x, x=x_x
114 : 7234 : case Fragment::WRAP_C: return
115 : 7234 : "B"_mst.If(x << "K"_mst) | // B=K_x
116 [ + + ]: 7234 : (x & "ghijk"_mst) | // g=g_x, h=h_x, i=i_x, j=j_x, k=k_x
117 : 14468 : (x & "ondfem"_mst) | // o=o_x, n=n_x, d=d_x, f=f_x, e=e_x, m=m_x
118 [ + + ]: 14466 : "us"_mst; // u, s
119 : 122 : case Fragment::WRAP_D: return
120 : 122 : "B"_mst.If(x << "Vz"_mst) | // B=V_x*z_x
121 [ + - ]: 122 : "o"_mst.If(x << "z"_mst) | // o=z_x
122 [ + - ]: 122 : "e"_mst.If(x << "f"_mst) | // e=f_x
123 [ + - ]: 122 : (x & "ghijk"_mst) | // g=g_x, h=h_x, i=i_x, j=j_x, k=k_x
124 : 244 : (x & "ms"_mst) | // m=m_x, s=s_x
125 : : // NOTE: 'd:' is 'u' under Tapscript but not P2WSH as MINIMALIF is only a policy rule there.
126 [ + + + - ]: 150 : "u"_mst.If(IsTapscript(ms_ctx)) |
127 : 244 : "ndx"_mst; // n, d, x
128 : 2030 : case Fragment::WRAP_V: return
129 : 2030 : "V"_mst.If(x << "B"_mst) | // V=B_x
130 [ + + ]: 2030 : (x & "ghijk"_mst) | // g=g_x, h=h_x, i=i_x, j=j_x, k=k_x
131 : 4060 : (x & "zonms"_mst) | // z=z_x, o=o_x, n=n_x, m=m_x, s=s_x
132 [ + + ]: 4056 : "fx"_mst; // f, x
133 : 16 : case Fragment::WRAP_J: return
134 : 16 : "B"_mst.If(x << "Bn"_mst) | // B=B_x*n_x
135 [ + - ]: 16 : "e"_mst.If(x << "f"_mst) | // e=f_x
136 [ + + ]: 16 : (x & "ghijk"_mst) | // g=g_x, h=h_x, i=i_x, j=j_x, k=k_x
137 : 32 : (x & "oums"_mst) | // o=o_x, u=u_x, m=m_x, s=s_x
138 [ + + ]: 32 : "ndx"_mst; // n, d, x
139 : 7318946 : case Fragment::WRAP_N: return
140 : 7318946 : (x & "ghijk"_mst) | // g=g_x, h=h_x, i=i_x, j=j_x, k=k_x
141 : 7318946 : (x & "Bzondfems"_mst) | // B=B_x, z=z_x, o=o_x, n=n_x, d=d_x, f=f_x, e=e_x, m=m_x, s=s_x
142 : 7318946 : "ux"_mst; // u, x
143 : 1883 : case Fragment::AND_V: return
144 [ + + ]: 3751 : (y & "KVB"_mst).If(x << "V"_mst) | // B=V_x*B_y, V=V_x*V_y, K=V_x*K_y
145 [ + + + + ]: 3766 : (x & "n"_mst) | (y & "n"_mst).If(x << "z"_mst) | // n=n_x+z_x*n_y
146 [ + + ]: 1883 : ((x | y) & "o"_mst).If((x | y) << "z"_mst) | // o=o_x*z_y+z_x*o_y
147 [ + + ]: 1883 : (x & y & "mz"_mst) | // m=m_x*m_y, z=z_x*z_y
148 [ + + ]: 1883 : ((x | y) & "s"_mst) | // s=s_x+s_y
149 [ + + ]: 493 : "f"_mst.If((y << "f"_mst) || (x << "s"_mst)) | // f=f_y+s_x
150 [ + + ]: 1883 : (y & "ux"_mst) | // u=u_y, x=x_y
151 [ + + ]: 1883 : ((x | y) & "ghij"_mst) | // g=g_x+g_y, h=h_x+h_y, i=i_x+i_y, j=j_x+j_y
152 [ + + + + ]: 1883 : "k"_mst.If(((x & y) << "k"_mst) &&
153 [ + + + - : 3746 : !(((x << "g"_mst) && (y << "h"_mst)) ||
+ + + + ]
154 [ + + + - : 1873 : ((x << "h"_mst) && (y << "g"_mst)) ||
+ + ]
155 [ + + + - ]: 1873 : ((x << "i"_mst) && (y << "j"_mst)) ||
156 [ + + + - ]: 3756 : ((x << "j"_mst) && (y << "i"_mst)))); // k=k_x*k_y*!(g_x*h_y + h_x*g_y + i_x*j_y + j_x*i_y)
157 : 7110 : case Fragment::AND_B: return
158 : 7110 : (x & "B"_mst).If(y << "W"_mst) | // B=B_x*W_y
159 [ + + + + ]: 13127 : ((x | y) & "o"_mst).If((x | y) << "z"_mst) | // o=o_x*z_y+z_x*o_y
160 [ + + ]: 7110 : (x & "n"_mst) | (y & "n"_mst).If(x << "z"_mst) | // n=n_x+z_x*n_y
161 [ + + + + ]: 8181 : (x & y & "e"_mst).If((x & y) << "s"_mst) | // e=e_x*e_y*s_x*s_y
162 [ + + ]: 7110 : (x & y & "dzm"_mst) | // d=d_x*d_y, z=z_x*z_y, m=m_x*m_y
163 [ + - + - ]: 7083 : "f"_mst.If(((x & y) << "f"_mst) || (x << "sf"_mst) || (y << "sf"_mst)) | // f=f_x*f_y + f_x*s_x + f_y*s_y
164 : 14220 : ((x | y) & "s"_mst) | // s=s_x+s_y
165 [ + + ]: 7110 : "ux"_mst | // u, x
166 [ + + ]: 7110 : ((x | y) & "ghij"_mst) | // g=g_x+g_y, h=h_x+h_y, i=i_x+i_y, j=j_x+j_y
167 [ + + + + ]: 7110 : "k"_mst.If(((x & y) << "k"_mst) &&
168 [ + + - + : 14210 : !(((x << "g"_mst) && (y << "h"_mst)) ||
+ + + + ]
169 [ + + + + : 7104 : ((x << "h"_mst) && (y << "g"_mst)) ||
- + ]
170 [ - + - - ]: 7102 : ((x << "i"_mst) && (y << "j"_mst)) ||
171 [ + + - + ]: 14212 : ((x << "j"_mst) && (y << "i"_mst)))); // k=k_x*k_y*!(g_x*h_y + h_x*g_y + i_x*j_y + j_x*i_y)
172 : 117 : case Fragment::OR_B: return
173 [ + + ]: 121 : "B"_mst.If(x << "Bd"_mst && y << "Wd"_mst) | // B=B_x*d_x*W_x*d_y
174 [ + + + + ]: 129 : ((x | y) & "o"_mst).If((x | y) << "z"_mst) | // o=o_x*z_y+z_x*o_y
175 [ + + ]: 109 : (x & y & "m"_mst).If((x | y) << "s"_mst && (x & y) << "e"_mst) | // m=m_x*m_y*e_x*e_y*(s_x+s_y)
176 : 234 : (x & y & "zse"_mst) | // z=z_x*z_y, s=s_x*s_y, e=e_x*e_y
177 [ + + ]: 117 : "dux"_mst | // d, u, x
178 [ + + ]: 117 : ((x | y) & "ghij"_mst) | // g=g_x+g_y, h=h_x+h_y, i=i_x+i_y, j=j_x+j_y
179 [ + + ]: 234 : (x & y & "k"_mst); // k=k_x*k_y
180 : 136 : case Fragment::OR_D: return
181 : 136 : (y & "B"_mst).If(x << "Bdu"_mst) | // B=B_y*B_x*d_x*u_x
182 [ + + + + ]: 160 : (x & "o"_mst).If(y << "z"_mst) | // o=o_x*z_y
183 [ + + ]: 122 : (x & y & "m"_mst).If(x << "e"_mst && (x | y) << "s"_mst) | // m=m_x*m_y*e_x*(s_x+s_y)
184 : 272 : (x & y & "zs"_mst) | // z=z_x*z_y, s=s_x*s_y
185 : 272 : (y & "ufde"_mst) | // u=u_y, f=f_y, d=d_y, e=e_y
186 [ + + ]: 136 : "x"_mst | // x
187 [ + + ]: 136 : ((x | y) & "ghij"_mst) | // g=g_x+g_y, h=h_x+h_y, i=i_x+i_y, j=j_x+j_y
188 [ + + ]: 272 : (x & y & "k"_mst); // k=k_x*k_y
189 : 60 : case Fragment::OR_C: return
190 : 60 : (y & "V"_mst).If(x << "Bdu"_mst) | // V=V_y*B_x*u_x*d_x
191 [ + + + + ]: 76 : (x & "o"_mst).If(y << "z"_mst) | // o=o_x*z_y
192 [ + + ]: 56 : (x & y & "m"_mst).If(x << "e"_mst && (x | y) << "s"_mst) | // m=m_x*m_y*e_x*(s_x+s_y)
193 : 120 : (x & y & "zs"_mst) | // z=z_x*z_y, s=s_x*s_y
194 [ + + ]: 60 : "fx"_mst | // f, x
195 [ + + ]: 60 : ((x | y) & "ghij"_mst) | // g=g_x+g_y, h=h_x+h_y, i=i_x+i_y, j=j_x+j_y
196 [ + + ]: 120 : (x & y & "k"_mst); // k=k_x*k_y
197 : 653 : case Fragment::OR_I: return
198 : 653 : (x & y & "VBKufs"_mst) | // V=V_x*V_y, B=B_x*B_y, K=K_x*K_y, u=u_x*u_y, f=f_x*f_y, s=s_x*s_y
199 : 653 : "o"_mst.If((x & y) << "z"_mst) | // o=z_x*z_y
200 [ + + ]: 653 : ((x | y) & "e"_mst).If((x | y) << "f"_mst) | // e=e_x*f_y+f_x*e_y
201 [ + + ]: 653 : (x & y & "m"_mst).If((x | y) << "s"_mst) | // m=m_x*m_y*(s_x+s_y)
202 : 1306 : ((x | y) & "d"_mst) | // d=d_x+d_y
203 [ + + ]: 653 : "x"_mst | // x
204 [ + + ]: 653 : ((x | y) & "ghij"_mst) | // g=g_x+g_y, h=h_x+h_y, i=i_x+i_y, j=j_x+j_y
205 [ + + ]: 1306 : (x & y & "k"_mst); // k=k_x*k_y
206 : 267 : case Fragment::ANDOR: return
207 [ + + ]: 526 : (y & z & "BKV"_mst).If(x << "Bdu"_mst) | // B=B_x*d_x*u_x*B_y*B_z, K=B_x*d_x*u_x*K_y*K_z, V=B_x*d_x*u_x*V_y*V_z
208 : 534 : (x & y & z & "z"_mst) | // z=z_x*z_y*z_z
209 [ + + + + ]: 387 : ((x | (y & z)) & "o"_mst).If((x | (y & z)) << "z"_mst) | // o=o_x*z_y*z_z+z_x*o_y*o_z
210 [ + + ]: 267 : (y & z & "u"_mst) | // u=u_y*u_z
211 [ + + + + ]: 267 : (z & "f"_mst).If((x << "s"_mst) || (y << "f"_mst)) | // f=(s_x+f_y)*f_z
212 [ + + ]: 267 : (z & "d"_mst) | // d=d_z
213 [ + + + + ]: 267 : (z & "e"_mst).If(x << "s"_mst || y << "f"_mst) | // e=e_z*(s_x+f_y)
214 [ + + ]: 239 : (x & y & z & "m"_mst).If(x << "e"_mst && (x | y | z) << "s"_mst) | // m=m_x*m_y*m_z*e_x*(s_x+s_y+s_z)
215 : 534 : (z & (x | y) & "s"_mst) | // s=s_z*(s_x+s_y)
216 [ + + ]: 267 : "x"_mst | // x
217 [ + + ]: 267 : ((x | y | z) & "ghij"_mst) | // g=g_x+g_y+g_z, h=h_x+h_y+h_z, i=i_x+i_y+i_z, j=j_x+j_y_j_z
218 [ + + - + ]: 267 : "k"_mst.If(((x & y & z) << "k"_mst) &&
219 [ - + - - : 522 : !(((x << "g"_mst) && (y << "h"_mst)) ||
+ + + + ]
220 [ + + + - : 261 : ((x << "h"_mst) && (y << "g"_mst)) ||
- + ]
221 [ - + - - ]: 261 : ((x << "i"_mst) && (y << "j"_mst)) ||
222 [ + + + - ]: 528 : ((x << "j"_mst) && (y << "i"_mst)))); // k=k_x*k_y*k_z* !(g_x*h_y + h_x*g_y + i_x*j_y + j_x*i_y)
223 : 173 : case Fragment::MULTI: {
224 : 173 : return "Bnudemsk"_mst;
225 : : }
226 : 821 : case Fragment::MULTI_A: {
227 : 821 : return "Budemsk"_mst;
228 : : }
229 : 390 : case Fragment::THRESH: {
230 : 390 : bool all_e = true;
231 : 390 : bool all_m = true;
232 : 390 : uint32_t args = 0;
233 : 390 : uint32_t num_s = 0;
234 : 390 : Type acc_tl = "k"_mst;
235 [ - + + + ]: 1903 : for (size_t i = 0; i < sub_types.size(); ++i) {
236 [ + + ]: 1515 : Type t = sub_types[i];
237 [ + + + + ]: 1515 : if (!(t << (i ? "Wdu"_mst : "Bdu"_mst))) return ""_mst; // Require Bdu, Wdu, Wdu, ...
238 [ + + ]: 1513 : if (!(t << "e"_mst)) all_e = false;
239 [ - + ]: 1513 : if (!(t << "m"_mst)) all_m = false;
240 [ + + ]: 1513 : if (t << "s"_mst) num_s += 1;
241 [ + - + + ]: 1513 : args += (t << "z"_mst) ? 0 : (t << "o"_mst) ? 1 : 2;
242 : 1513 : acc_tl = ((acc_tl | t) & "ghij"_mst) |
243 : : // Thresh contains a combination of timelocks if it has threshold > 1 and
244 : : // it contains two different children that have different types of timelocks
245 : : // Note how if any of the children don't have "k", the parent also does not have "k"
246 [ + + + + ]: 1513 : "k"_mst.If(((acc_tl & t) << "k"_mst) && ((k <= 1) ||
247 [ - + - - : 2706 : ((k > 1) && !(((acc_tl << "g"_mst) && (t << "h"_mst)) ||
+ + + + ]
248 [ + + + - : 1357 : ((acc_tl << "h"_mst) && (t << "g"_mst)) ||
+ + ]
249 [ + + - + ]: 1357 : ((acc_tl << "i"_mst) && (t << "j"_mst)) ||
250 [ + + + - ]: 1801 : ((acc_tl << "j"_mst) && (t << "i"_mst))))));
251 : : }
252 : 776 : return "Bdu"_mst |
253 : 388 : "z"_mst.If(args == 0) | // z=all z
254 [ - + - + ]: 388 : "o"_mst.If(args == 1) | // o=all z except one o
255 [ + + + + : 388 : "e"_mst.If(all_e && num_s == n_subs) | // e=all e and all s
- + ]
256 [ + + + + ]: 388 : "m"_mst.If(all_e && all_m && num_s >= n_subs - k) | // m=all e, >=(n-k) s
257 [ + + + + ]: 756 : "s"_mst.If(num_s >= n_subs - k + 1) | // s= >=(n-k+1) s
258 : 388 : acc_tl; // timelock info
259 : : }
260 : : }
261 : 0 : assert(false);
262 : : }
263 : :
264 : 7366414 : size_t ComputeScriptLen(Fragment fragment, Type sub0typ, size_t subsize, uint32_t k, size_t n_subs,
265 : : size_t n_keys, MiniscriptContext ms_ctx) {
266 [ + + + + : 7366414 : switch (fragment) {
+ + + + +
+ + + + +
- + ]
267 : : case Fragment::JUST_1:
268 : : case Fragment::JUST_0: return 1;
269 [ + + ]: 6435 : case Fragment::PK_K: return IsTapscript(ms_ctx) ? 33 : 34;
270 : 877 : case Fragment::PK_H: return 3 + 21;
271 : 9420 : case Fragment::OLDER:
272 [ - + ]: 9420 : case Fragment::AFTER: return 1 + BuildScript(k).size();
273 : 226 : case Fragment::HASH256:
274 : 226 : case Fragment::SHA256: return 4 + 2 + 33;
275 : 174 : case Fragment::HASH160:
276 : 174 : case Fragment::RIPEMD160: return 4 + 2 + 21;
277 [ - + + - ]: 346 : case Fragment::MULTI: return 1 + BuildScript(n_keys).size() + BuildScript(k).size() + 34 * n_keys;
278 [ - + ]: 821 : case Fragment::MULTI_A: return (1 + 32 + 1) * n_keys + BuildScript(k).size() + 1;
279 : 1883 : case Fragment::AND_V: return subsize;
280 : 2030 : case Fragment::WRAP_V: return subsize + (sub0typ << "x"_mst);
281 : 7334298 : case Fragment::WRAP_S:
282 : 7334298 : case Fragment::WRAP_C:
283 : 7334298 : case Fragment::WRAP_N:
284 : 7334298 : case Fragment::AND_B:
285 : 7334298 : case Fragment::OR_B: return subsize + 1;
286 : 7539 : case Fragment::WRAP_A:
287 : 7539 : case Fragment::OR_C: return subsize + 2;
288 : 1178 : case Fragment::WRAP_D:
289 : 1178 : case Fragment::OR_D:
290 : 1178 : case Fragment::OR_I:
291 : 1178 : case Fragment::ANDOR: return subsize + 3;
292 : 16 : case Fragment::WRAP_J: return subsize + 4;
293 [ - + ]: 390 : case Fragment::THRESH: return subsize + n_subs + BuildScript(k).size();
294 : : }
295 : 0 : assert(false);
296 : : }
297 : :
298 : 90354406 : InputStack& InputStack::SetAvailable(Availability avail) {
299 : 90354406 : available = avail;
300 [ + + ]: 90354406 : if (avail == Availability::NO) {
301 : 90162853 : stack.clear();
302 : 90162853 : size = std::numeric_limits<size_t>::max();
303 : 90162853 : has_sig = false;
304 : 90162853 : malleable = false;
305 : 90162853 : non_canon = false;
306 : : }
307 : 90354406 : return *this;
308 : : }
309 : :
310 : 473780 : InputStack& InputStack::SetWithSig() {
311 : 473780 : has_sig = true;
312 : 473780 : return *this;
313 : : }
314 : :
315 : 819769 : InputStack& InputStack::SetNonCanon() {
316 : 819769 : non_canon = true;
317 : 819769 : return *this;
318 : : }
319 : :
320 : 821722 : InputStack& InputStack::SetMalleable(bool x) {
321 : 821722 : malleable = x;
322 : 821722 : return *this;
323 : : }
324 : :
325 : 90637975 : InputStack operator+(InputStack a, InputStack b) {
326 [ + - ]: 90637975 : a.stack = Cat(std::move(a.stack), std::move(b.stack));
327 [ + + + + ]: 90637975 : if (a.available != Availability::NO && b.available != Availability::NO) a.size += b.size;
328 : 90637975 : a.has_sig |= b.has_sig;
329 : 90637975 : a.malleable |= b.malleable;
330 : 90637975 : a.non_canon |= b.non_canon;
331 [ + + + + ]: 90637975 : if (a.available == Availability::NO || b.available == Availability::NO) {
332 : 89874481 : a.SetAvailable(Availability::NO);
333 [ + - - + ]: 763494 : } else if (a.available == Availability::MAYBE || b.available == Availability::MAYBE) {
334 : 0 : a.SetAvailable(Availability::MAYBE);
335 : : }
336 : 90637975 : return a;
337 : : }
338 : :
339 : 45221683 : InputStack operator|(InputStack a, InputStack b) {
340 : : // If only one is invalid, pick the other one. If both are invalid, pick an arbitrary one.
341 [ + + ]: 45221683 : if (a.available == Availability::NO) return b;
342 [ + + ]: 784625 : if (b.available == Availability::NO) return a;
343 : : // If only one of the solutions has a signature, we must pick the other one.
344 [ + + + + ]: 208595 : if (!a.has_sig && b.has_sig) return a;
345 [ + + + + ]: 11313 : if (!b.has_sig && a.has_sig) return b;
346 [ + + + - ]: 11133 : if (!a.has_sig && !b.has_sig) {
347 : : // If neither solution requires a signature, the result is inevitably malleable.
348 : 1160 : a.malleable = true;
349 : 1160 : b.malleable = true;
350 : : } else {
351 : : // If both options require a signature, prefer the non-malleable one.
352 [ + + + - ]: 9973 : if (b.malleable && !a.malleable) return a;
353 [ + + + - ]: 9947 : if (a.malleable && !b.malleable) return b;
354 : : }
355 : : // Between two malleable or two non-malleable solutions, pick the smaller one between
356 : : // YESes, and the bigger ones between MAYBEs. Prefer YES over MAYBE.
357 [ + - + - ]: 11094 : if (a.available == Availability::YES && b.available == Availability::YES) {
358 [ + + ]: 11931 : return std::move(a.size <= b.size ? a : b);
359 [ # # # # ]: 0 : } else if (a.available == Availability::MAYBE && b.available == Availability::MAYBE) {
360 [ # # ]: 0 : return std::move(a.size >= b.size ? a : b);
361 [ # # ]: 0 : } else if (a.available == Availability::YES) {
362 : 0 : return a;
363 : : } else {
364 : 0 : return b;
365 : : }
366 : : }
367 : :
368 : 5172 : std::optional<std::vector<Opcode>> DecomposeScript(const CScript& script)
369 : : {
370 : 5172 : std::vector<Opcode> out;
371 [ + + ]: 10344 : CScript::const_iterator it = script.begin(), itend = script.end();
372 [ + + ]: 6485123 : while (it != itend) {
373 : 6479955 : std::vector<unsigned char> push_data;
374 : 6479955 : opcodetype opcode;
375 [ + - - + ]: 6479955 : if (!script.GetOp(it, opcode, push_data)) {
376 : 0 : return {};
377 [ + + ]: 6479955 : } else if (opcode >= OP_1 && opcode <= OP_16) {
378 : : // Deal with OP_n (GetOp does not turn them into pushes).
379 [ + - ]: 4443 : push_data.assign(1, CScript::DecodeOP_N(opcode));
380 [ + + ]: 6475512 : } else if (opcode == OP_CHECKSIGVERIFY) {
381 : : // Decompose OP_CHECKSIGVERIFY into OP_CHECKSIG OP_VERIFY
382 [ + - ]: 1131 : out.emplace_back(OP_CHECKSIG, std::vector<unsigned char>());
383 : 1131 : opcode = OP_VERIFY;
384 [ + + ]: 6474381 : } else if (opcode == OP_CHECKMULTISIGVERIFY) {
385 : : // Decompose OP_CHECKMULTISIGVERIFY into OP_CHECKMULTISIG OP_VERIFY
386 [ + - ]: 18 : out.emplace_back(OP_CHECKMULTISIG, std::vector<unsigned char>());
387 : 18 : opcode = OP_VERIFY;
388 [ + + ]: 6474363 : } else if (opcode == OP_EQUALVERIFY) {
389 : : // Decompose OP_EQUALVERIFY into OP_EQUAL OP_VERIFY
390 [ + - ]: 1218 : out.emplace_back(OP_EQUAL, std::vector<unsigned char>());
391 : 1218 : opcode = OP_VERIFY;
392 [ + + ]: 6473145 : } else if (opcode == OP_NUMEQUALVERIFY) {
393 : : // Decompose OP_NUMEQUALVERIFY into OP_NUMEQUAL OP_VERIFY
394 [ + - ]: 1 : out.emplace_back(OP_NUMEQUAL, std::vector<unsigned char>());
395 : 1 : opcode = OP_VERIFY;
396 [ + + ]: 6473144 : } else if (IsPushdataOp(opcode)) {
397 [ + - + + ]: 97853 : if (!CheckMinimalPush(push_data, opcode)) return {};
398 [ + + + + : 6375291 : } else if (it != itend && (opcode == OP_CHECKSIG || opcode == OP_CHECKMULTISIG || opcode == OP_EQUAL || opcode == OP_NUMEQUAL) && (*it == OP_VERIFY)) {
+ + - + +
+ ]
399 : : // Rule out non minimal VERIFY sequences
400 : 2 : return {};
401 : : }
402 [ + - ]: 6479951 : out.emplace_back(opcode, std::move(push_data));
403 : 6479955 : }
404 : 5168 : std::reverse(out.begin(), out.end());
405 : 5168 : return out;
406 : 5172 : }
407 : :
408 : 5250 : std::optional<int64_t> ParseScriptNumber(const Opcode& in) {
409 [ - + ]: 5250 : if (in.first == OP_0) {
410 : 0 : return 0;
411 : : }
412 [ + + ]: 5250 : if (!in.second.empty()) {
413 [ + + - + ]: 5249 : if (IsPushdataOp(in.first) && !CheckMinimalPush(in.second, in.first)) return {};
414 : 5249 : try {
415 [ + + ]: 5249 : return CScriptNum(in.second, true).GetInt64();
416 [ - + ]: 3 : } catch(const scriptnum_error&) {}
417 : : }
418 : 4 : return {};
419 : : }
420 : :
421 : 280 : int FindNextChar(std::span<const char> sp, const char m)
422 : : {
423 [ + - ]: 14946 : for (int i = 0; i < (int)sp.size(); ++i) {
424 [ + + ]: 14946 : if (sp[i] == m) return i;
425 : : // We only search within the current parentheses
426 [ + + ]: 14712 : if (sp[i] == ')') break;
427 : : }
428 : : return -1;
429 : : }
430 : :
431 : : } // namespace internal
432 : : } // namespace miniscript
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