OP_CODEs

This set of OP_CODES are only recognized by the colored coins software and should not be confused with Bitcoin OP_CODES (such as OP_RETURN).

Colored coins OP_CODES are encoded using a single byte. Half of the values represented by that byte are reserved for Core Colored Coins protocol OP_CODES, the other half is left open for custom OP_CODES that may be added by users (e.g. in forks of the colored coins opensource software).

In particular

• The first 128 values 0x00-0x7F are reserved for Colored Coins OP_CODES
• 0x01-0x0F represent Issuance OP_CODES
• 0x10-0x1F represent Transfer OP_CODES
• 0x20-0x2F represent Burn OP_CODES
• The last 128 values 0x80-0xFF can be used for referring to new OP_CODES used by custom extensions (plugins)

The table below lists the (currently available) Colored Coins OP_CODES

• The I/T/B column refers to whether this is an Issuance, a Transfer or a Burn OP_CODE.
• The M column designates whether any Metadata was stored at all
• The 1(2) column designates whether a (1|2) multisignature address was used in addition to OP_RETURN
• The 1(3) column designates whether a (1|3) multisignature address was used in addition to OP_RETURN

Hex	Meaning	I/T/B	M	1(2)	1(3)	Comment
0x00	Undefined
0x01	SHA1 Torrent info_hash + SHA256 of metadata in 80 bytes OP_RETURN	I	✔	✕	✕
0x02	SHA1 torrent info_hash in OP_RETURN SHA256 of metadata in 1(2) multisig	I	✔	✔	✕
0x03	SHA1 Torrent info_hash + SHA256 of metadata in 1(3) multisig	I	✔	✕	✔
0x04	SHA1 Torrent Hash in OP_RETURN No SHA256 of metadata	I	✔	✕	✕	Low Security
0x05	No Metadata, cannot add rules	I	✕	✕	✕	Locked
0x06	No Metadata, can add rules	I	✕	✕	✕	Unlocked
0x10	SHA1 Torrent info_hash + SHA256 of metadata in 80 byte OP_RETURN	T	✔	✕	✕
0x11	SHA256 of metadata in 1(2) multisig	T	✔	✔	✕
0x12	SHA1 Torrent info_hash + SHA256 of metadata in 1(3) multisig	T	✔	✕	✔
0x13	SHA1 Torrent info_hash in OP_RETURN No SHA256 of metadata	T	✔	✕	✕
0x14	SHA1 Torrent info_hash in OP_RETURN No SHA256 of metadata No rules in metadata	T	✔	✕	✕	Low Security, Ignore rules if exist
0x15	No Metadata	T	✕	✕	✕
0x20	SHA1 Torrent info_hash + SHA256 of metadata in 80 byte OP_RETURN	B	✔	✕	✕
0x21	SHA256 of metadata in 1(2) multisig	B	✔	✔	✕
0x22	SHA1 Torrent info_hash + SHA256 of metadata in 1(3) multisig	B	✔	✕	✔
0x23	SHA1 Torrent info_hash in OP_RETURN No SHA256 of metadata	B	✔	✕	✕
0x24	SHA1 Torrent info_hash in OP_RETURN No SHA256 of metadata No rules in metadata	B	✔	✕	✕	Low Security, Ignore rules if exist
0x25	No Metadata	B	✕	✕	✕