EMPTY_HASH160 sentinel = HASH160(""). Means "skip auth" in owner / arbitrator slots.

@spec p2mpkh_locking_script(<<_::160>>) :: binary()

Build the fixed 70-byte STAS 3.0 v0.1 §10.2 P2MPKH locking-script body.

This locking script is used at issuance and redemption boundaries of a STAS token — i.e. on UTXOs that are not themselves STAS in-life UTXOs but bracket a STAS token's lifecycle. In-life STAS UTXOs do NOT carry this script; the engine inlines equivalent logic.

Input

• mpkh — 20-byte MPKH (HASH160 of the redeem buffer; see BSV.Transaction.P2MPKH.mpkh/1).

Output

70-byte binary equal to:

<<0x76, 0xA9, 0x14, mpkh::binary-size(20),
  0x88, 0x82, 0x01, 0x21, 0x87, 0x63, 0xAC, 0x67,
  0x51, 0x7F, (0x51, 0x7F, 0x73, 0x63, 0x7C, 0x7F, 0x68) x 5,
  0xAE, 0x68>>

Decoded as Bitcoin Script: OP_DUP OP_HASH160 <MPKH> OP_EQUALVERIFY OP_SIZE 0x21 OP_EQUAL OP_IF OP_CHECKSIG OP_ELSE OP_1 OP_SPLIT (OP_1 OP_SPLIT OP_IFDUP OP_IF OP_SWAP OP_SPLIT OP_ENDIF) x 5 OP_CHECKMULTISIG OP_ENDIF.

STAS 3.0 v0.1 §10.2 P2MPKH locking-script body length (70 bytes).

Standard P2PKH script length in bytes.

P2PKH script prefix: OP_DUP OP_HASH160 OP_DATA_20.

P2PKH script suffix: OP_EQUALVERIFY OP_CHECKSIG.

Length of a public key hash in bytes.

STAS 3.0 base template prefix bytes.

Length of the STAS 3.0 base template in bytes.

STAS v2 marker bytes after the 20-byte owner PKH.

Byte offset of the STAS v2 marker within the script.

Minimum length of a STAS v2 script (template + flags).

Byte offset of the OP_RETURN within a STAS v2 template.

Byte offset of the owner PKH within a STAS v2 script.

STAS v2 prefix bytes: OP_DUP OP_HASH160 OP_DATA_20.

Byte offset of the redemption PKH within a STAS v2 template.

Length of the STAS v2 template body in bytes.