import "nftGuardProto.scrypt";import "../utils/txProof.scrypt";import "../utils/sigHashUtils.scrypt";import "../utils/stateUtils.scrypt";import "../utils/txUtil.scrypt";

contract NftTransferGuard {
  public function transfer(bytes[5] curTxoStateHashes, bytes[5] ownerAddrOrScriptList, int[5] localIdList, bool[5] nftOutputMaskList, bytes[5] outputSatoshisList, bytes nftSatoshis, NftGuardConstState preState, XrayedTxIdPreimg3 preTx, SHPreimage shPreimage, PrevoutsCtx prevoutsCtx, bytes[6] spentScripts) {
    require(checkSig(SigHashUtils.checkSHPreimage(shPreimage), SigHashUtils.Gx));
    SigHashUtils.checkPrevoutsCtx(prevoutsCtx, shPreimage.hashPrevouts, shPreimage.inputIndex);
    SigHashUtils.checkSpentScriptsCtx(spentScripts, shPreimage.hashSpentScripts);
    StateUtils.verifyGuardStateHash(preTx, prevoutsCtx.spentTxhash, NftGuardProto.stateHash(preState));
    int[5] localIdArray = repeat(-1, 5);
    int localIdArrayIndex = 0;
    loop (6) : i {
        bytes script = spentScripts[i];
        if(script == preState.collectionScript) {
          localIdArray[(localIdArrayIndex)] = preState.localIdArray[i];
          localIdArrayIndex += 1;
        }
      }
    bytes stateHashString = b'';
    bytes outputs = b'';
    int outputLocalIdArrayIndex = 0;
    bytes nftOutput = TxUtil.buildOutput(preState.collectionScript, nftSatoshis);
    loop (5) : i {
        bytes addrOrScript = ownerAddrOrScriptList[i];
        if(nftOutputMaskList[i]) {
          int localId = localIdArray[(outputLocalIdArrayIndex)];
          outputs = outputs + nftOutput;
          Ripemd160 nftStateHash = hash160(hash160(addrOrScript + pack(localId)));
          require(hash160(curTxoStateHashes[i]) == nftStateHash);
          require(localId >= 0);
          require(localIdList[i] == localId);
          stateHashString += nftStateHash;
          outputLocalIdArrayIndex += 1;
        } else {
          require(addrOrScript != preState.collectionScript);
          stateHashString += hash160(curTxoStateHashes[i]);
          if(len(addrOrScript) > 0) {
            outputs += TxUtil.buildOutput(addrOrScript, outputSatoshisList[i]);
          }
        }
      }
    require(localIdArrayIndex == outputLocalIdArrayIndex);
    bytes stateOutput = TxUtil.buildOpReturnRoot(TxUtil.getStateScript(hash160(stateHashString)));
    Sha256 hashOutputs = sha256(stateOutput + outputs);
    require(hashOutputs == shPreimage.hashOutputs);
  }
}