/**
* Adds a copy of the given byte array as a data element (i.e. PUSHDATA) at the given index in the
* program.
*/
public ScriptBuilder data(int index, byte[] data) {
// implements BIP62
byte[] copy = Arrays.copyOf(data, data.length);
int opcode;
if (data.length == 0) {
opcode = OP_0;
} else if (data.length == 1) {
byte b = data[0];
if (b >= 1 && b <= 16) opcode = Script.encodeToOpN(b);
else opcode = 1;
} else if (data.length < OP_PUSHDATA1) {
opcode = data.length;
} else if (data.length < 256) {
opcode = OP_PUSHDATA1;
} else if (data.length < 65536) {
opcode = OP_PUSHDATA2;
} else {
throw new RuntimeException("Unimplemented");
}
return addChunk(index, new ScriptChunk(opcode, copy));
}
/** Adds the given number as a OP_N opcode to the given index in the program. */
public ScriptBuilder smallNum(int index, int num) {
checkArgument(num >= 0, "Cannot encode negative numbers with smallNum");
checkArgument(num <= 16, "Cannot encode numbers larger than 16 with smallNum");
return addChunk(index, new ScriptChunk(Script.encodeToOpN(num), null));
}