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// Copyright 2018 The Alephium Authors
// This file is part of the alephium project.
//
// The library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the library. If not, see .

package org.alephium.api.model

import org.alephium.protocol.model.{Address, BlockHash, ContractId, TransactionId}
import org.alephium.protocol.vm.{debugEventIndex, LockupScript, LogState, LogStateRef, LogStates}
import org.alephium.util.AVector

final case class ContractEvents(
    events: AVector[ContractEvent],
    nextStart: Int
)

final case class ContractEventsByTxId(
    events: AVector[ContractEventByTxId]
)

final case class ContractEventsByBlockHash(
    events: AVector[ContractEventByBlockHash]
)

final case class ContractEvent(
    blockHash: BlockHash,
    txId: TransactionId,
    eventIndex: Int,
    fields: AVector[Val]
)

final case class ContractEventByTxId(
    blockHash: BlockHash,
    contractAddress: Address.Contract,
    eventIndex: Int,
    fields: AVector[Val]
) {
  def getContractId(): Option[ContractId] = {
    fields.get(0).flatMap {
      case ValAddress(Address.Contract(LockupScript.P2C(id))) => Some(id)
      case _                                                  => None
    }
  }
}

object ContractEventByTxId {
  def from(blockHash: BlockHash, ref: LogStateRef, logState: LogState): ContractEventByTxId = {
    ContractEventByTxId(
      blockHash,
      Address.contract(ref.id.contractId),
      logState.index.toInt,
      logState.fields.map(Val.from)
    )
  }
}

final case class ContractEventByBlockHash(
    txId: TransactionId,
    contractAddress: Address.Contract,
    eventIndex: Int,
    fields: AVector[Val]
)

object ContractEventByBlockHash {
  def from(ref: LogStateRef, logState: LogState): ContractEventByBlockHash = {
    ContractEventByBlockHash(
      logState.txId,
      Address.contract(ref.id.contractId),
      logState.index.toInt,
      logState.fields.map(Val.from)
    )
  }
}

object ContractEvents {
  def from(logStates: LogStates): AVector[ContractEvent] = {
    logStates.states.flatMap { logState =>
      if (logState.index != debugEventIndex.v.v.intValue().toByte) {
        AVector(
          ContractEvent(
            logStates.blockHash,
            logState.txId,
            logState.index.toInt,
            logState.fields.map(Val.from)
          )
        )
      } else {
        AVector.empty
      }
    }
  }

  def from(logStatesVec: AVector[LogStates], nextStart: Int): ContractEvents = {
    ContractEvents(
      logStatesVec.flatMap(ContractEvents.from),
      nextStart
    )
  }
}




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