FazBrowse GitHub Viewer
|
Trending
|
URL:
|
Home
Tools:
[Download Repo ZIP]
[View Raw Code]
[Original HTTPS Page]
JavaScriptSolidServer/src/mrc20.js at patchAppend · bourgeoa/JavaScriptSolidServer · GitHub
bourgeoa
JavaScriptSolidServer
Repository navigation
Code
Issues
Pull requests
Actions
Projects
Security and quality
Insights
Expand file tree
Breadcrumbs
JavaScriptSolidServer
/
src
/
mrc20.js
Copy path
More file actions
More file actions
Latest commit
History
History
History
335 lines (294 loc) · 11.1 KB
Breadcrumbs
JavaScriptSolidServer
/
src
/
mrc20.js
Copy path
File metadata and controls
335 lines (294 loc) · 11.1 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
/**
* MRC20 Token Verification
*
* Verifies MRC20 state chain integrity and extracts transfer operations.
* Used by the pay middleware to accept token deposits.
*
* MRC20 profile: mono.mrc20.v0.1
* State chain: each state links to previous via SHA-256 of JCS-encoded state.
*
* References:
* - Blocktrails: https://blocktrails.org/
* - JCS (RFC 8785): JSON Canonicalization Scheme
*/
import
crypto
from
'crypto'
;
import
{
secp256k1
}
from
'@noble/curves/secp256k1'
;
const
MRC20_PROFILE
=
'mono.mrc20.v0.1'
;
const
TRANSFER_OP
=
'urn:mono:op:transfer'
;
// --- BIP-341 key chaining constants ---
const
SECP_N
=
BigInt
(
'0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141'
)
;
const
BECH32_CHARSET
=
'qpzry9x8gf2tvdw0s3jn54khce6mua7l'
;
const
BECH32M
=
0x2bc830a3
;
/**
* JSON Canonicalization Scheme (RFC 8785)
* Produces deterministic JSON — sorted keys, no whitespace.
*
@param
{
*
} obj
*
@returns
{
string
}
*/
export
function
jcs
(
obj
)
{
if
(
obj
===
null
||
typeof
obj
!==
'object'
)
return
JSON
.
stringify
(
obj
)
;
if
(
Array
.
isArray
(
obj
)
)
return
'['
+
obj
.
map
(
v
=>
jcs
(
v
)
)
.
join
(
','
)
+
']'
;
const
keys
=
Object
.
keys
(
obj
)
.
sort
(
)
;
return
'{'
+
keys
.
map
(
k
=>
JSON
.
stringify
(
k
)
+
':'
+
jcs
(
obj
[
k
]
)
)
.
join
(
','
)
+
'}'
;
}
/**
* SHA-256 hex digest of a string
*
@param
{
string
} str
*
@returns
{
string
} Hex hash
*/
export
function
sha256Hex
(
str
)
{
return
crypto
.
createHash
(
'sha256'
)
.
update
(
str
)
.
digest
(
'hex'
)
;
}
/**
* Verify state chain link: state.prev must equal SHA-256(JCS(prevState))
*
@param
{
object
} state - Current state
*
@param
{
object
} prevState - Previous state
*
@returns
{
{valid: boolean, error?: string}
}
*/
export
function
verifyStateLink
(
state
,
prevState
)
{
if
(
!
state
||
!
prevState
)
{
return
{
valid
:
false
,
error
:
'Missing state or prevState'
}
;
}
const
expectedPrev
=
sha256Hex
(
jcs
(
prevState
)
)
;
if
(
state
.
prev
!==
expectedPrev
)
{
return
{
valid
:
false
,
error
:
`State chain break: expected prev
${
expectedPrev
}
, got
${
state
.
prev
}
`
}
;
}
// Verify sequence number
if
(
typeof
state
.
seq
===
'number'
&&
typeof
prevState
.
seq
===
'number'
)
{
if
(
state
.
seq
!==
prevState
.
seq
+
1
)
{
return
{
valid
:
false
,
error
:
`Sequence mismatch: expected
${
prevState
.
seq
+
1
}
, got
${
state
.
seq
}
`
}
;
}
}
return
{
valid
:
true
}
;
}
/**
* Validate that a state object is a valid MRC20 state
*
@param
{
object
} state
*
@returns
{
{valid: boolean, error?: string}
}
*/
export
function
validateMrc20State
(
state
)
{
if
(
!
state
||
typeof
state
!==
'object'
)
{
return
{
valid
:
false
,
error
:
'State must be an object'
}
;
}
if
(
state
.
profile
!==
MRC20_PROFILE
)
{
return
{
valid
:
false
,
error
:
`Invalid profile: expected
${
MRC20_PROFILE
}
, got
${
state
.
profile
}
`
}
;
}
if
(
!
Array
.
isArray
(
state
.
ops
)
)
{
return
{
valid
:
false
,
error
:
'State must have ops array'
}
;
}
if
(
typeof
state
.
prev
!==
'string'
)
{
return
{
valid
:
false
,
error
:
'State must have prev hash'
}
;
}
return
{
valid
:
true
}
;
}
/**
* Extract transfer operations targeting a specific address
*
@param
{
object
} state - MRC20 state
*
@param
{
string
} toAddress - Recipient address to filter by
*
@returns
{
Array<{from: string, to: string, amt: number}>
} Matching transfers
*/
export
function
extractTransfersTo
(
state
,
toAddress
)
{
if
(
!
state
.
ops
||
!
Array
.
isArray
(
state
.
ops
)
)
return
[
]
;
return
state
.
ops
.
filter
(
op
=>
op
.
op
===
TRANSFER_OP
&&
op
.
to
===
toAddress
&&
typeof
op
.
amt
===
'number'
&&
op
.
amt
>
0
)
;
}
/**
* Get total amount transferred to an address in a state
*
@param
{
object
} state - MRC20 state
*
@param
{
string
} toAddress - Recipient address
*
@returns
{
number
} Total amount transferred
*/
export
function
totalTransferredTo
(
state
,
toAddress
)
{
const
transfers
=
extractTransfersTo
(
state
,
toAddress
)
;
return
transfers
.
reduce
(
(
sum
,
op
)
=>
sum
+
op
.
amt
,
0
)
;
}
/**
* Verify an MRC20 deposit: validate state chain + extract transfer amount
*
@param
{
object
} params
*
@param
{
object
} params.state - New state containing transfer ops
*
@param
{
object
} params.prevState - Previous state (for chain verification)
*
@param
{
string
} params.toAddress - Pod's address to check transfers against
*
@returns
{
{valid: boolean, amount: number, ticker?: string, error?: string}
}
*/
export
function
verifyMrc20Deposit
(
params
)
{
const
{
state
,
prevState
,
toAddress
}
=
params
;
// Validate MRC20 format
const
stateCheck
=
validateMrc20State
(
state
)
;
if
(
!
stateCheck
.
valid
)
return
{
valid
:
false
,
amount
:
0
,
error
:
stateCheck
.
error
}
;
const
prevCheck
=
validateMrc20State
(
prevState
)
;
if
(
!
prevCheck
.
valid
)
return
{
valid
:
false
,
amount
:
0
,
error
:
`prevState:
${
prevCheck
.
error
}
`
}
;
// Verify state chain link
const
linkCheck
=
verifyStateLink
(
state
,
prevState
)
;
if
(
!
linkCheck
.
valid
)
return
{
valid
:
false
,
amount
:
0
,
error
:
linkCheck
.
error
}
;
// Extract transfers to pod
const
amount
=
totalTransferredTo
(
state
,
toAddress
)
;
if
(
amount
<=
0
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
`No transfers to
${
toAddress
}
found in state ops`
}
;
}
return
{
valid
:
true
,
amount
,
ticker
:
state
.
ticker
||
'UNKNOWN'
}
;
}
// --- BIP-341 key chaining (blocktrails anchor verification) ---
function
sha256Bytes
(
data
)
{
const
buf
=
data
instanceof
Uint8Array
?
Buffer
.
from
(
data
)
:
Buffer
.
from
(
data
,
'utf8'
)
;
return
new
Uint8Array
(
crypto
.
createHash
(
'sha256'
)
.
update
(
buf
)
.
digest
(
)
)
;
}
function
concatBytes
(
...
arrays
)
{
const
total
=
arrays
.
reduce
(
(
s
,
a
)
=>
s
+
a
.
length
,
0
)
;
const
result
=
new
Uint8Array
(
total
)
;
let
off
=
0
;
for
(
const
a
of
arrays
)
{
result
.
set
(
a
,
off
)
;
off
+=
a
.
length
;
}
return
result
;
}
function
bytesToBigInt
(
bytes
)
{
let
r
=
0n
;
for
(
const
b
of
bytes
)
r
=
(
r
<<
8n
)
|
BigInt
(
b
)
;
return
r
;
}
function
hexToU8
(
hex
)
{
const
bytes
=
new
Uint8Array
(
hex
.
length
/
2
)
;
for
(
let
i
=
0
;
i
<
bytes
.
length
;
i
++
)
bytes
[
i
]
=
parseInt
(
hex
.
slice
(
i
*
2
,
i
*
2
+
2
)
,
16
)
;
return
bytes
;
}
function
bytesToHex
(
bytes
)
{
return
Array
.
from
(
bytes
)
.
map
(
b
=>
b
.
toString
(
16
)
.
padStart
(
2
,
'0'
)
)
.
join
(
''
)
;
}
function
taggedHash
(
tag
,
...
msgs
)
{
const
tagHash
=
sha256Bytes
(
Buffer
.
from
(
tag
,
'utf8'
)
)
;
return
sha256Bytes
(
concatBytes
(
tagHash
,
tagHash
,
...
msgs
)
)
;
}
function
btScalar
(
pubkeyCompressed
,
state
)
{
const
xOnly
=
pubkeyCompressed
.
slice
(
1
)
;
const
stateBytes
=
typeof
state
===
'string'
?
Buffer
.
from
(
state
,
'utf8'
)
:
state
;
const
sh
=
sha256Bytes
(
stateBytes
)
;
return
bytesToBigInt
(
taggedHash
(
'TapTweak'
,
xOnly
,
sh
)
)
%
SECP_N
;
}
function
btDeriveChainedPubkey
(
pubkeyBase
,
states
)
{
let
P
=
secp256k1
.
ProjectivePoint
.
fromHex
(
bytesToHex
(
pubkeyBase
)
)
;
let
cur
=
pubkeyBase
;
for
(
const
s
of
states
)
{
const
t
=
btScalar
(
cur
,
s
)
;
P
=
P
.
add
(
secp256k1
.
ProjectivePoint
.
BASE
.
multiply
(
t
)
)
;
cur
=
new
Uint8Array
(
P
.
toRawBytes
(
true
)
)
;
}
return
cur
;
}
// --- Bech32m encoding ---
function
convertBits
(
data
,
from
,
to
,
pad
)
{
let
acc
=
0
,
bits
=
0
;
const
ret
=
[
]
,
maxv
=
(
1
<<
to
)
-
1
;
for
(
const
v
of
data
)
{
acc
=
(
acc
<<
from
)
|
v
;
bits
+=
from
;
while
(
bits
>=
to
)
{
bits
-=
to
;
ret
.
push
(
(
acc
>>
bits
)
&
maxv
)
;
}
}
if
(
pad
&&
bits
>
0
)
ret
.
push
(
(
acc
<<
(
to
-
bits
)
)
&
maxv
)
;
return
ret
;
}
function
hrpExpand
(
hrp
)
{
const
r
=
[
]
;
for
(
const
c
of
hrp
)
r
.
push
(
c
.
charCodeAt
(
0
)
>>
5
)
;
r
.
push
(
0
)
;
for
(
const
c
of
hrp
)
r
.
push
(
c
.
charCodeAt
(
0
)
&
31
)
;
return
r
;
}
function
polymod
(
values
)
{
const
GEN
=
[
0x3b6a57b2
,
0x26508e6d
,
0x1ea119fa
,
0x3d4233dd
,
0x2a1462b3
]
;
let
chk
=
1
;
for
(
const
v
of
values
)
{
const
b
=
chk
>>
25
;
chk
=
(
(
chk
&
0x1ffffff
)
<<
5
)
^
v
;
for
(
let
i
=
0
;
i
<
5
;
i
++
)
if
(
(
b
>>
i
)
&
1
)
chk
^=
GEN
[
i
]
;
}
return
chk
;
}
function
bech32mEncode
(
hrp
,
version
,
program
)
{
const
conv
=
convertBits
(
program
,
8
,
5
,
true
)
;
const
values
=
[
version
,
...
conv
]
;
const
enc
=
[
...
hrpExpand
(
hrp
)
,
...
values
,
0
,
0
,
0
,
0
,
0
,
0
]
;
const
mod
=
polymod
(
enc
)
^
BECH32M
;
const
checksum
=
[
0
,
1
,
2
,
3
,
4
,
5
]
.
map
(
i
=>
(
mod
>>
(
5
*
(
5
-
i
)
)
)
&
31
)
;
let
result
=
hrp
+
'1'
;
for
(
const
v
of
[
...
values
,
...
checksum
]
)
result
+=
BECH32_CHARSET
[
v
]
;
return
result
;
}
/**
* Derive the taproot address for a state chain
*
@param
{
string
} pubkeyHex - Issuer's compressed pubkey (66-char hex)
*
@param
{
string[]
} states - JCS-encoded state strings
*
@param
{
string
} [network='testnet4'] - 'testnet4' or 'mainnet'
*
@returns
{
string
} Bech32m taproot address
*/
export
function
btAddress
(
pubkeyHex
,
states
,
network
=
'testnet4'
)
{
const
pubkeyBase
=
hexToU8
(
pubkeyHex
)
;
const
P
=
btDeriveChainedPubkey
(
pubkeyBase
,
states
)
;
const
xOnly
=
P
.
slice
(
1
)
;
const
hrp
=
network
===
'mainnet'
?
'bc'
:
'tb'
;
return
bech32mEncode
(
hrp
,
1
,
xOnly
)
;
}
/**
* Verify that an MRC20 state is anchored to a Bitcoin UTXO
*
@param
{
object
} params
*
@param
{
object
} params.state - Current state with transfer ops
*
@param
{
object
} params.prevState - Previous state (chain verification)
*
@param
{
string
} params.toAddress - Pod's address for transfer verification
*
@param
{
string
} params.pubkey - Issuer's compressed pubkey (66-char hex)
*
@param
{
string[]
} params.stateStrings - All JCS state strings (genesis to current)
*
@param
{
string
} [params.mempoolUrl] - Mempool API base URL
*
@param
{
string
} [params.network] - 'testnet4' or 'mainnet'
*
@returns
{
Promise<{valid: boolean, amount?: number, ticker?: string, address?: string, error?: string}>
}
*/
export
async
function
verifyMrc20Anchor
(
params
)
{
const
{
state
,
prevState
,
toAddress
,
pubkey
,
stateStrings
,
mempoolUrl
=
'https://mempool.space/testnet4'
,
network
=
'testnet4'
}
=
params
;
// 1. Standard deposit verification (chain integrity + transfers)
const
depositCheck
=
verifyMrc20Deposit
(
{
state
,
prevState
,
toAddress
}
)
;
if
(
!
depositCheck
.
valid
)
return
depositCheck
;
// 2. Verify stateStrings is provided and non-empty
if
(
!
Array
.
isArray
(
stateStrings
)
||
stateStrings
.
length
===
0
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
'stateStrings required for anchor verification'
}
;
}
// 3. Verify pubkey is provided
if
(
!
pubkey
||
typeof
pubkey
!==
'string'
||
pubkey
.
length
!==
66
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
'pubkey must be a 66-char compressed pubkey hex'
}
;
}
// 4. Verify the last stateString matches the current state
const
currentJcs
=
jcs
(
state
)
;
const
lastStateString
=
stateStrings
[
stateStrings
.
length
-
1
]
;
if
(
currentJcs
!==
lastStateString
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
'Last stateString does not match JCS(state)'
}
;
}
// 5. Derive expected taproot address
let
address
;
try
{
address
=
btAddress
(
pubkey
,
stateStrings
,
network
)
;
}
catch
(
err
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
`Key derivation failed:
${
err
.
message
}
`
}
;
}
// 6. Query mempool for UTXO at derived address
try
{
const
resp
=
await
fetch
(
`
${
mempoolUrl
}
/api/address/
${
address
}
/utxo`
)
;
if
(
!
resp
.
ok
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
`Mempool API error:
${
resp
.
status
}
`
}
;
}
const
utxos
=
await
resp
.
json
(
)
;
if
(
!
Array
.
isArray
(
utxos
)
||
utxos
.
length
===
0
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
`No UTXO at derived address
${
address
}
`
}
;
}
}
catch
(
err
)
{
return
{
valid
:
false
,
amount
:
0
,
error
:
`Mempool lookup failed:
${
err
.
message
}
`
}
;
}
return
{
valid
:
true
,
amount
:
depositCheck
.
amount
,
ticker
:
depositCheck
.
ticker
,
address
}
;
}
Back
|
FazBrowse Home
|
New Git URL