Function copyInput

src/simplicity/elements/env.c:68–104

Initialize a 'sigInput' from a 'rawElementsInput', copying or hashing the data as needed. * * Precondition: NULL != result; * NULL != input; */

 *               NULL != input;
 */
static void copyInput(sigInput* result, const rawElementsInput* input) {
  *result = (sigInput){ .prevOutpoint = { .ix = input->prevIx }
                      , .sequence = input->sequence
                      , .isPegin = !!input->pegin
                      , .hasAnnex = !!input->annex
                      };

  if (input->annex) hashBuffer(&result->annexHash, input->annex);
  if (input->pegin) sha256_toMidstate(result->pegin.s, input->pegin);
  sha256_toMidstate(result->prevOutpoint.txid.s, input->prevTxid);
  hashBuffer(&result->txo.scriptPubKey, &input->txo.scriptPubKey);
  copyRawConfidential(&result->txo.asset, input->txo.asset);
  copyRawAmt(&result->txo.amt, input->txo.value);
  hashBuffer(&result->scriptSigHash, &input->scriptSig);
  hashBuffer(&result->issuance.assetRangeProofHash, &(rawElementsBuffer){0});
  hashBuffer(&result->issuance.tokenRangeProofHash, &(rawElementsBuffer){0});
  if (input->issuance.amount || input->issuance.inflationKeys) {
    sha256_toMidstate(result->issuance.blindingNonce.s, input->issuance.blindingNonce);
    copyRawAmt(&result->issuance.assetAmt, input->issuance.amount);
    if (is_confidential(result->issuance.assetAmt.prefix)) hashBuffer(&result->issuance.assetRangeProofHash, &input->issuance.amountRangePrf);
    if (0 == result->issuance.blindingNonce.s[0] && 0 == result->issuance.blindingNonce.s[1] &&
        0 == result->issuance.blindingNonce.s[2] && 0 == result->issuance.blindingNonce.s[3] &&
        0 == result->issuance.blindingNonce.s[4] && 0 == result->issuance.blindingNonce.s[5] &&
        0 == result->issuance.blindingNonce.s[6] && 0 == result->issuance.blindingNonce.s[7]) {
      sha256_toMidstate(result->issuance.contractHash.s, input->issuance.assetEntropy);
      result->issuance.entropy = simplicity_generateIssuanceEntropy(&result->prevOutpoint, &result->issuance.contractHash);
      copyRawAmt(&result->issuance.tokenAmt, input->issuance.inflationKeys);
      if (is_confidential(result->issuance.tokenAmt.prefix)) hashBuffer(&result->issuance.tokenRangeProofHash, &input->issuance.inflationKeysRangePrf);
      result->issuance.type = NEW_ISSUANCE;
    } else {
      sha256_toMidstate(result->issuance.entropy.s, input->issuance.assetEntropy);
      result->issuance.type = REISSUANCE;
    }
    result->issuance.assetId = simplicity_calculateAsset(&result->issuance.entropy);
    result->issuance.tokenId = simplicity_calculateToken(&result->issuance.entropy, result->issuance.assetAmt.prefix);
  }
}

/* As specified in https://github.com/ElementsProject/elements/blob/de942511a67c3a3fcbdf002a8ee7e9ba49679b78/src/primitives/transaction.h#L304-L307. */
static bool isFee(const rawElementsOutput* output) {