protected static boolean isScriptInputStandard(byte[][] chunks) throws ScriptParsingException {
try {
if (chunks.length != 2) {
return false;
}
// Verify that first chunk contains two DER encoded BigIntegers
ByteReader reader = new ByteReader(chunks[0]);
// Read tag, must be 0x30
if ((((int) reader.get()) & 0xFF) != 0x30) {
return false;
}
// Read total length as a byte, standard inputs never get longer than
// this
int length = ((int) reader.get()) & 0xFF;
// Read first type, must be 0x02
if ((((int) reader.get()) & 0xFF) != 0x02) {
return false;
}
// Read first length
int length1 = ((int) reader.get()) & 0xFF;
reader.skip(length1);
// Read second type, must be 0x02
if ((((int) reader.get()) & 0xFF) != 0x02) {
return false;
}
// Read second length
int length2 = ((int) reader.get()) & 0xFF;
reader.skip(length2);
// Validate that the lengths add up to the total
if (2 + length1 + 2 + length2 != length) {
return false;
}
// Make sure that we have a hash type at the end
if (reader.available() != 1) {
return false;
}
// XXX we may want to add more checks to verify public key length in
// second chunk
return true;
} catch (InsufficientBytesException e) {
throw new ScriptParsingException(
"Unable to parse " + ScriptInputStandard.class.getSimpleName());
}
}
public OutPoint(ByteReader reader) throws InsufficientBytesException {
this.hash = reader.getSha256Hash();
this.index = (int) reader.getCompactInt();
}