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 that byte is 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 bits 0x00-0x7F are Colored Coins OP_CODES
• 0x01-0x0F represent Issuance OP_CODES
• 0x10-0x1F represent Transfer OP_CODES
• The last 128 bits 0x80-0xFF are custom OP_CODES

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

• The I/T column refers to whether this is an Issuance or a Transfer OP_CODE)
• The D column designates whether any metadata was stored at all
• The M column designates whether a multisignature address was used in addition to OP_RETURN

Hex	Meaning	I/T	D	M	Comment
0x00	Undefined
0x01	All metadata in OP_RETURN	I	✔	✕
0x02	SHA256 of metadata in 1 of 2 multisig	I	✔	✔
0x03	Both SHA1 Torrent Hash + SHA256 of metadata in 1 of 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	All metadata in OP_RETURN	T	✔	✕
0x11	SHA256 of metadata in 1 of 2 multisig	T	✔	✔
0x12	Both SHA1 Torrent Hash + SHA256 of metadata in 1 of 3 multisig	T	✔	✔
0x13	SHA1 Torrent Hash in OP_RETURN No SHA256 of metadata	T	✔	✔	Low Security
0x14	SHA1 Torrent Hash in OP_RETURN No SHA256 of metadata No rules in metadata	T	✔	✔	Low Security, Ignore rules if exist
0x15	No Metadata	T	✕	✕