Pointer

In order to make an inscription on a sat other than the first of its input, a zero-based integer, called the "pointer", can be provided with tag 2, causing the inscription to be made on the sat at the given position in the outputs. If the pointer is equal to or greater than the number of total sats in the outputs of the inscribe transaction, it is ignored, and the inscription is made as usual. The value of the pointer field is a little endian integer, with trailing zeroes ignored.

An even tag is used, so that old versions of ord consider the inscription to be unbound, instead of assigning it, incorrectly, to the first sat.

This can be used to create multiple inscriptions in a single transaction on different sats, when otherwise they would be made on the same sat.

Examples

An inscription with pointer 255:

OP_FALSE
OP_IF
  OP_PUSH "ord"
  OP_PUSH 1
  OP_PUSH "text/plain;charset=utf-8"
  OP_PUSH 2
  OP_PUSH 0xff
  OP_PUSH 0
  OP_PUSH "Hello, world!"
OP_ENDIF

An inscription with pointer 256:

OP_FALSE
OP_IF
  OP_PUSH "ord"
  OP_PUSH 1
  OP_PUSH "text/plain;charset=utf-8"
  OP_PUSH 2
  OP_PUSH 0x0001
  OP_PUSH 0
  OP_PUSH "Hello, world!"
OP_ENDIF

An inscription with pointer 256, with trailing zeroes, which are ignored:

OP_FALSE
OP_IF
  OP_PUSH "ord"
  OP_PUSH 1
  OP_PUSH "text/plain;charset=utf-8"
  OP_PUSH 2
  OP_PUSH 0x000100
  OP_PUSH 0
  OP_PUSH "Hello, world!"
OP_ENDIF