Function imrIV

src/simplicity/dag.c:45–49

Given a tag for a node, return the SHA-256 hash of its associated IMR tag. * This is the "initial value" for computing the commitment Merkle root for that expression. * * Precondition: 'tag' \notin {HIDDEN, JET, WORD} */

 * Precondition: 'tag' \notin {HIDDEN, JET, WORD}
 */
static sha256_midstate imrIV(tag_t tag) {
  return DISCONNECT == tag ? imr_disconnectIV
       : WITNESS == tag ? imr_witnessIV
       : cmrIV(tag);
}

/* Given a tag for a node, return the SHA-256 hash of its associated AMR tag.
 * This is the "initial value" for computing the annotated Merkle root for that expression.