// indexScriptPubKey indexes all data pushes greater than 8 bytes within the
// passed SPK. Our "address" index is actually a hash160 index, where in the
// ideal case the data push is either the hash160 of a publicKey (P2PKH) or
// a Script (P2SH).
func indexScriptPubKey(addrIndex database.BlockAddrIndex, scriptPubKey []byte,
locInBlock *wire.TxLoc) error {
dataPushes, err := txscript.PushedData(scriptPubKey)
if err != nil {
adxrLog.Tracef("Couldn't get pushes: %v", err)
return err
}
for _, data := range dataPushes {
// Only index pushes greater than 8 bytes.
if len(data) < 8 {
continue
}
var indexKey [ripemd160.Size]byte
// A perfect little hash160.
if len(data) <= 20 {
copy(indexKey[:], data)
// Otherwise, could be a payToPubKey or an OP_RETURN, so we'll
// make a hash160 out of it.
} else {
copy(indexKey[:], btcutil.Hash160(data))
}
addrIndex[indexKey] = append(addrIndex[indexKey], locInBlock)
}
return nil
}
// TestPushedData ensured the PushedData function extracts the expected data out
// of various scripts.
func TestPushedData(t *testing.T) {
t.Parallel()
var tests = []struct {
script string
out [][]byte
valid bool
}{
{
"0 IF 0 ELSE 2 ENDIF",
[][]byte{nil, nil},
true,
},
{
"16777216 10000000",
[][]byte{
{0x00, 0x00, 0x00, 0x01}, // 16777216
{0x80, 0x96, 0x98, 0x00}, // 10000000
},
true,
},
{
"DUP HASH160 '17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem' EQUALVERIFY CHECKSIG",
[][]byte{
// 17VZNX1SN5NtKa8UQFxwQbFeFc3iqRYhem
{
0x31, 0x37, 0x56, 0x5a, 0x4e, 0x58, 0x31, 0x53, 0x4e, 0x35,
0x4e, 0x74, 0x4b, 0x61, 0x38, 0x55, 0x51, 0x46, 0x78, 0x77,
0x51, 0x62, 0x46, 0x65, 0x46, 0x63, 0x33, 0x69, 0x71, 0x52,
0x59, 0x68, 0x65, 0x6d,
},
},
true,
},
{
"PUSHDATA4 1000 EQUAL",
nil,
false,
},
}
for i, test := range tests {
script := mustParseShortForm(test.script)
data, err := txscript.PushedData(script)
if test.valid && err != nil {
t.Errorf("TestPushedData failed test #%d: %v\n", i, err)
continue
} else if !test.valid && err == nil {
t.Errorf("TestPushedData failed test #%d: test should "+
"be invalid\n", i)
continue
}
if !reflect.DeepEqual(data, test.out) {
t.Errorf("TestPushedData failed test #%d: want: %x "+
"got: %x\n", i, test.out, data)
}
}
}