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[솔리디티][디앱] lottery - truffle를 활용한 스마트 컨트랙트 상호작용 본문

블록체인/솔리디티

[솔리디티][디앱] lottery - truffle를 활용한 스마트 컨트랙트 상호작용

코드코코 2022. 2. 13. 21:48

truffle를 활용한 스마트 컨트랙트 상호작용

 

contracts/Lottery.sol 작성

pragma solidity >=0.4.22 <0.9.0;

contract Lottery {
  //주소를 오너로 설정
  //public : 자동으로 getter를 만들어 준다, 스마트 컨트랙트 외부에서 바로 오너의 값을 알 수 있다.
  address public owner;

//스마트 컨트랙트가 생성될 때,, 배포가 될때, 가장 먼저 실행되는 함수.
  constructor() public {
    //배포가 될 때, 보낸사람을 오너로 저장하겠다.
    // msg.sender : 스마트 컨트랙트에서 사용하는 전역변수 
    owner = msg.sender;
  }

  function getSomeValue() public pure returns (uint256 value){
    return 5;
  }
}

 

 

truffle migrate

처음 마이그레이트 했을 때 가스양

truffle migrate --reset

- Lottey.sol 내용 추가 후 가스양

- ganache-cli 에 기록되는 내용과도 일치.

ganache-cli 창에서 확인 되는 내용

- 아래와 같은 경고문이 뜨기는 하나 결과 확인에는 문제가 없다.

truffle 에서도 확인

truffle console

- 블록체인으로 접근가능

- geth console을 통해 접근하는 것과 같음

- web3 object 사용가능

C:\Users\coco\Desktop\coco\studying_solidity\lotteryDapp>truffle console
truffle(development)>

 

truffle(development)> web3

- web3 객체확인

truffle(development)> web3
Web3Shim {
  currentProvider: [Getter/Setter],
  _requestManager: RequestManager {
    provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    subscriptions: Map(0) {}
  },
  givenProvider: null,
  providers: {
    WebsocketProvider: [Function: WebsocketProvider],
    HttpProvider: [Function: HttpProvider],
    IpcProvider: [Function: IpcProvider]
  },
  _provider: HttpProvider {
    withCredentials: false,
    timeout: 0,
    headers: undefined,
    agent: undefined,
    connected: true,
    host: 'http://127.0.0.1:8545',
    httpAgent: Agent {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      defaultPort: 80,
      protocol: 'http:',
      options: [Object: null prototype],
      requests: [Object: null prototype] {},
      sockets: [Object: null prototype] {},
      freeSockets: [Object: null prototype] {},
      keepAliveMsecs: 1000,
      keepAlive: false,
      maxSockets: Infinity,
      maxFreeSockets: 256,
      scheduling: 'lifo',
      maxTotalSockets: Infinity,
      totalSocketCount: 0,
      [Symbol(kCapture)]: false
    },
    send: [Function (anonymous)],
    _alreadyWrapped: true
  },
  setProvider: [Function (anonymous)],
  setRequestManager: [Function (anonymous)],
  BatchRequest: [Function: bound Batch],
  extend: [Function: ex] {
    formatters: {
      inputDefaultBlockNumberFormatter: [Function: inputDefaultBlockNumberFormatter],
      inputBlockNumberFormatter: [Function: inputBlockNumberFormatter],
      inputCallFormatter: [Function: inputCallFormatter],
      inputTransactionFormatter: [Function: inputTransactionFormatter],
      inputAddressFormatter: [Function: inputAddressFormatter],
      inputPostFormatter: [Function: inputPostFormatter],
      inputLogFormatter: [Function: inputLogFormatter],
      inputSignFormatter: [Function: inputSignFormatter],
      inputStorageKeysFormatter: [Function: inputStorageKeysFormatter],
      outputProofFormatter: [Function: outputProofFormatter],
      outputBigNumberFormatter: [Function: outputBigNumberFormatter],
      outputTransactionFormatter: [Function: outputTransactionFormatter],
      outputTransactionReceiptFormatter: [Function: outputTransactionReceiptFormatter],
      outputBlockFormatter: [Function: outputBlockFormatter],
      outputLogFormatter: [Function: outputLogFormatter],
      outputPostFormatter: [Function: outputPostFormatter],
      outputSyncingFormatter: [Function: outputSyncingFormatter]
    },
    utils: {
      _fireError: [Function: _fireError],
      _jsonInterfaceMethodToString: [Function: _jsonInterfaceMethodToString],
      _flattenTypes: [Function: _flattenTypes],
      randomHex: [Function: randomHex],
      BN: [Function],
      isBN: [Function: isBN],
      isBigNumber: [Function: isBigNumber],
      isHex: [Function: isHex],
      isHexStrict: [Function: isHexStrict],
      sha3: [Function],
      sha3Raw: [Function: sha3Raw],
      keccak256: [Function],
      soliditySha3: [Function: soliditySha3],
      soliditySha3Raw: [Function: soliditySha3Raw],
      encodePacked: [Function: encodePacked],
      isAddress: [Function: isAddress],
      checkAddressChecksum: [Function: checkAddressChecksum],
      toChecksumAddress: [Function: toChecksumAddress],
      toHex: [Function: toHex],
      toBN: [Function: toBN],
      bytesToHex: [Function: bytesToHex],
      hexToBytes: [Function: hexToBytes],
      hexToNumberString: [Function: hexToNumberString],
      hexToNumber: [Function: hexToNumber],
      toDecimal: [Function: hexToNumber],
      numberToHex: [Function: numberToHex],
      fromDecimal: [Function: numberToHex],
      hexToUtf8: [Function: hexToUtf8],
      hexToString: [Function: hexToUtf8],
      toUtf8: [Function: hexToUtf8],
      stripHexPrefix: [Function: stripHexPrefix],
      utf8ToHex: [Function: utf8ToHex],
      stringToHex: [Function: utf8ToHex],
      fromUtf8: [Function: utf8ToHex],
      hexToAscii: [Function: hexToAscii],
      toAscii: [Function: hexToAscii],
      asciiToHex: [Function: asciiToHex],
      fromAscii: [Function: asciiToHex],
      unitMap: [Object],
      toWei: [Function: toWei],
      fromWei: [Function: fromWei],
      padLeft: [Function: leftPad],
      leftPad: [Function: leftPad],
      padRight: [Function: rightPad],
      rightPad: [Function: rightPad],
      toTwosComplement: [Function: toTwosComplement],
      isBloom: [Function: isBloom],
      isUserEthereumAddressInBloom: [Function: isUserEthereumAddressInBloom],
      isContractAddressInBloom: [Function: isContractAddressInBloom],
      isTopic: [Function: isTopic],
      isTopicInBloom: [Function: isTopicInBloom],
      isInBloom: [Function: isInBloom],
      compareBlockNumbers: [Function: compareBlockNumbers],
      toNumber: [Function: toNumber]
    },
    Method: [Function: Method]
  },
  version: '1.5.3',
  utils: {
    _fireError: [Function: _fireError],
    _jsonInterfaceMethodToString: [Function: _jsonInterfaceMethodToString],
    _flattenTypes: [Function: _flattenTypes],
    randomHex: [Function: randomHex],
    BN: <ref *1> [Function: BN] {
      BN: [Circular *1],
      wordSize: 26,
      isBN: [Function: isBN],
      max: [Function: max],
      min: [Function: min],
      red: [Function: red],
      _prime: [Function: prime],
      mont: [Function: mont]
    },
    isBN: [Function: isBN],
    isBigNumber: [Function: isBigNumber],
    isHex: [Function: isHex],
    isHexStrict: [Function: isHexStrict],
    sha3: [Function: sha3] { _Hash: [Object] },
    sha3Raw: [Function: sha3Raw],
    keccak256: [Function: sha3] { _Hash: [Object] },
    soliditySha3: [Function: soliditySha3],
    soliditySha3Raw: [Function: soliditySha3Raw],
    encodePacked: [Function: encodePacked],
    isAddress: [Function: isAddress],
    checkAddressChecksum: [Function: checkAddressChecksum],
    toChecksumAddress: [Function: toChecksumAddress],
    toHex: [Function: toHex],
    toBN: [Function: toBN],
    bytesToHex: [Function: bytesToHex],
    hexToBytes: [Function: hexToBytes],
    hexToNumberString: [Function: hexToNumberString],
    hexToNumber: [Function: hexToNumber],
    toDecimal: [Function: hexToNumber],
    numberToHex: [Function: numberToHex],
    fromDecimal: [Function: numberToHex],
    hexToUtf8: [Function: hexToUtf8],
    hexToString: [Function: hexToUtf8],
    toUtf8: [Function: hexToUtf8],
    stripHexPrefix: [Function: stripHexPrefix],
    utf8ToHex: [Function: utf8ToHex],
    stringToHex: [Function: utf8ToHex],
    fromUtf8: [Function: utf8ToHex],
    hexToAscii: [Function: hexToAscii],
    toAscii: [Function: hexToAscii],
    asciiToHex: [Function: asciiToHex],
    fromAscii: [Function: asciiToHex],
    unitMap: {
      noether: '0',
      wei: '1',
      kwei: '1000',
      Kwei: '1000',
      babbage: '1000',
      femtoether: '1000',
      mwei: '1000000',
      Mwei: '1000000',
      lovelace: '1000000',
      picoether: '1000000',
      gwei: '1000000000',
      Gwei: '1000000000',
      shannon: '1000000000',
      nanoether: '1000000000',
      nano: '1000000000',
      szabo: '1000000000000',
      microether: '1000000000000',
      micro: '1000000000000',
      finney: '1000000000000000',
      milliether: '1000000000000000',
      milli: '1000000000000000',
      ether: '1000000000000000000',
      kether: '1000000000000000000000',
      grand: '1000000000000000000000',
      mether: '1000000000000000000000000',
      gether: '1000000000000000000000000000',
      tether: '1000000000000000000000000000000'
    },
    toWei: [Function: toWei],
    fromWei: [Function: fromWei],
    padLeft: [Function: leftPad],
    leftPad: [Function: leftPad],
    padRight: [Function: rightPad],
    rightPad: [Function: rightPad],
    toTwosComplement: [Function: toTwosComplement],
    isBloom: [Function: isBloom],
    isUserEthereumAddressInBloom: [Function: isUserEthereumAddressInBloom],
    isContractAddressInBloom: [Function: isContractAddressInBloom],
    isTopic: [Function: isTopic],
    isTopicInBloom: [Function: isTopicInBloom],
    isInBloom: [Function: isInBloom],
    compareBlockNumbers: [Function: compareBlockNumbers],
    toNumber: [Function: toNumber]
  },
  eth: <ref *2> Eth {
    currentProvider: [Getter/Setter],
    _requestManager: RequestManager {
      provider: [HttpProvider],
      providers: [Object],
      subscriptions: Map(0) {}
    },
    givenProvider: null,
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    _provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    setProvider: [Function (anonymous)],
    setRequestManager: [Function (anonymous)],
    BatchRequest: [Function: bound Batch],
    extend: [Function: ex] {
      formatters: [Object],
      utils: [Object],
      Method: [Function: Method]
    },
    handleRevert: [Getter/Setter],
    defaultCommon: [Getter/Setter],
    defaultHardfork: [Getter/Setter],
    defaultChain: [Getter/Setter],
    transactionPollingTimeout: [Getter/Setter],
    transactionConfirmationBlocks: [Getter/Setter],
    transactionBlockTimeout: [Getter/Setter],
    defaultAccount: [Getter/Setter],
    defaultBlock: [Getter/Setter],
    maxListenersWarningThreshold: [Getter/Setter],
    clearSubscriptions: [Function: bound ],
    removeSubscriptionById: [Function: bound ],
    net: Net {
      currentProvider: [Getter/Setter],
      _requestManager: [RequestManager],
      givenProvider: null,
      providers: [Object],
      _provider: [HttpProvider],
      setProvider: [Function (anonymous)],
      setRequestManager: [Function (anonymous)],
      BatchRequest: [Function: bound Batch],
      extend: [Function],
      getId: [Function],
      isListening: [Function],
      getPeerCount: [Function],
      getNetworkType: [Function: bound getNetworkType]
    },
    accounts: Accounts {
      currentProvider: [Getter/Setter],
      _requestManager: [RequestManager],
      givenProvider: null,
      providers: [Object],
      _provider: [HttpProvider],
      setProvider: [Function (anonymous)],
      setRequestManager: [Function (anonymous)],
      _ethereumCall: [Object],
      wallet: [Wallet]
    },
    personal: Personal {
      currentProvider: [Getter/Setter],
      _requestManager: [RequestManager],
      givenProvider: null,
      providers: [Object],
      _provider: [HttpProvider],
      setProvider: [Function (anonymous)],
      setRequestManager: [Function (anonymous)],
      BatchRequest: [Function: bound Batch],
      extend: [Function],
      net: [Net],
      defaultAccount: [Getter/Setter],
      defaultBlock: [Getter/Setter],
      getAccounts: [Function],
      newAccount: [Function],
      unlockAccount: [Function],
      lockAccount: [Function],
      importRawKey: [Function],
      sendTransaction: [Function],
      signTransaction: [Function],
      sign: [Function],
      ecRecover: [Function]
    },
    Contract: [Function: Contract] {
      setProvider: [Function (anonymous)],
      defaultAccount: null,
      defaultBlock: 'latest',
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      handleRevert: false,
      _requestManager: [RequestManager],
      _ethAccounts: [Accounts],
      currentProvider: [HttpProvider]
    },
    Iban: [class Iban],
    abi: ABICoder {},
    ens: ENS {
      eth: [Circular *2],
      _detectedAddress: null,
      _lastSyncCheck: null,
      registry: [Getter],
      resolverMethodHandler: [Getter],
      registryAddress: [Getter/Setter]
    },
    getNodeInfo: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'web3_clientVersion'
    },
    getProtocolVersion: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_protocolVersion'
    },
    getCoinbase: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_coinbase'
    },
    isMining: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_mining'
    },
    getHashrate: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_hashrate'
    },
    isSyncing: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_syncing'
    },
    getGasPrice: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_gasPrice'
    },
    getFeeHistory: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_feeHistory'
    },
    getAccounts: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_accounts'
    },
    getBlockNumber: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_blockNumber'
    },
    getBalance: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getBalance'
    },
    getStorageAt: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getStorageAt'
    },
    getCode: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getCode'
    },
    getBlock: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: [Function: blockCall]
    },
    getUncle: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: [Function: uncleCall]
    },
    getBlockTransactionCount: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: [Function: getBlockTransactionCountCall]
    },
    getBlockUncleCount: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: [Function: uncleCountCall]
    },
    getTransaction: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getTransactionByHash'
    },
    getTransactionFromBlock: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: [Function: transactionFromBlockCall]
    },
    getTransactionReceipt: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getTransactionReceipt'
    },
    getTransactionCount: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getTransactionCount'
    },
    sendSignedTransaction: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_sendRawTransaction'
    },
    signTransaction: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_signTransaction'
    },
    sendTransaction: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_sendTransaction'
    },
    sign: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_sign'
    },
    call: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_call'
    },
    estimateGas: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_estimateGas'
    },
    submitWork: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_submitWork'
    },
    getWork: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getWork'
    },
    getPastLogs: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getLogs'
    },
    getChainId: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_chainId'
    },
    requestAccounts: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_requestAccounts'
    },
    getProof: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_getProof'
    },
    getPendingTransactions: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'eth_pendingTransactions'
    },
    subscribe: [Function (anonymous)]
  },
  shh: Shh {
    currentProvider: [Getter/Setter],
    _requestManager: RequestManager {
      provider: [HttpProvider],
      providers: [Object],
      subscriptions: Map(0) {}
    },
    givenProvider: null,
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    _provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    setProvider: [Function (anonymous)],
    setRequestManager: [Function (anonymous)],
    BatchRequest: [Function: bound Batch],
    extend: [Function: ex] {
      formatters: [Object],
      utils: [Object],
      Method: [Function: Method]
    },
    net: Net {
      currentProvider: [Getter/Setter],
      _requestManager: [RequestManager],
      givenProvider: null,
      providers: [Object],
      _provider: [HttpProvider],
      setProvider: [Function (anonymous)],
      setRequestManager: [Function (anonymous)],
      BatchRequest: [Function: bound Batch],
      extend: [Function],
      getId: [Function],
      isListening: [Function],
      getPeerCount: [Function]
    },
    subscribe: [Function (anonymous)],
    getVersion: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_version'
    },
    getInfo: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_info'
    },
    setMaxMessageSize: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_setMaxMessageSize'
    },
    setMinPoW: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_setMinPoW'
    },
    markTrustedPeer: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_markTrustedPeer'
    },
    newKeyPair: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_newKeyPair'
    },
    addPrivateKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_addPrivateKey'
    },
    deleteKeyPair: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_deleteKeyPair'
    },
    hasKeyPair: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_hasKeyPair'
    },
    getPublicKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_getPublicKey'
    },
    getPrivateKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_getPrivateKey'
    },
    newSymKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_newSymKey'
    },
    addSymKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_addSymKey'
    },
    generateSymKeyFromPassword: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_generateSymKeyFromPassword'
    },
    hasSymKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_hasSymKey'
    },
    getSymKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_getSymKey'
    },
    deleteSymKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_deleteSymKey'
    },
    newMessageFilter: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_newMessageFilter'
    },
    getFilterMessages: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_getFilterMessages'
    },
    deleteMessageFilter: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_deleteMessageFilter'
    },
    post: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_post'
    },
    unsubscribe: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'shh_unsubscribe'
    }
  },
  bzz: Bzz {
    givenProvider: null,
    currentProvider: null,
    isAvailable: [Function (anonymous)],
    upload: [Function (anonymous)],
    download: [Function (anonymous)]
  },
  networkType: 'ethereum'
}

- web3. 입력 후 tab 하면 사용할 수 있는 함수들을 확인할 수 있음.

truffle(development)> eth = web3.eth

- web3의 eth를 eth에 할당.

truffle(development)> eth = web3.eth
<ref *2> Eth {
  currentProvider: [Getter/Setter],
  _requestManager: RequestManager {
    provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    subscriptions: Map(0) {}
  },
  givenProvider: null,
  providers: {
    WebsocketProvider: [Function: WebsocketProvider],
    HttpProvider: [Function: HttpProvider],
    IpcProvider: [Function: IpcProvider]
  },
  _provider: HttpProvider {
    withCredentials: false,
    timeout: 0,
    headers: undefined,
    agent: undefined,
    connected: true,
    host: 'http://127.0.0.1:8545',
    httpAgent: Agent {
      _events: [Object: null prototype],
      _eventsCount: 2,
      _maxListeners: undefined,
      defaultPort: 80,
      protocol: 'http:',
      options: [Object: null prototype],
      requests: [Object: null prototype] {},
      sockets: [Object: null prototype] {},
      freeSockets: [Object: null prototype] {},
      keepAliveMsecs: 1000,
      keepAlive: false,
      maxSockets: Infinity,
      maxFreeSockets: 256,
      scheduling: 'lifo',
      maxTotalSockets: Infinity,
      totalSocketCount: 0,
      [Symbol(kCapture)]: false
    },
    send: [Function (anonymous)],
    _alreadyWrapped: true
  },
  setProvider: [Function (anonymous)],
  setRequestManager: [Function (anonymous)],
  BatchRequest: [Function: bound Batch],
  extend: [Function: ex] {
    formatters: {
      inputDefaultBlockNumberFormatter: [Function: inputDefaultBlockNumberFormatter],
      inputBlockNumberFormatter: [Function: inputBlockNumberFormatter],
      inputCallFormatter: [Function: inputCallFormatter],
      inputTransactionFormatter: [Function: inputTransactionFormatter],
      inputAddressFormatter: [Function: inputAddressFormatter],
      inputPostFormatter: [Function: inputPostFormatter],
      inputLogFormatter: [Function: inputLogFormatter],
      inputSignFormatter: [Function: inputSignFormatter],
      inputStorageKeysFormatter: [Function: inputStorageKeysFormatter],
      outputProofFormatter: [Function: outputProofFormatter],
      outputBigNumberFormatter: [Function: outputBigNumberFormatter],
      outputTransactionFormatter: [Function: outputTransactionFormatter],
      outputTransactionReceiptFormatter: [Function: outputTransactionReceiptFormatter],
      outputBlockFormatter: [Function: outputBlockFormatter],
      outputLogFormatter: [Function: outputLogFormatter],
      outputPostFormatter: [Function: outputPostFormatter],
      outputSyncingFormatter: [Function: outputSyncingFormatter]
    },
    utils: {
      _fireError: [Function: _fireError],
      _jsonInterfaceMethodToString: [Function: _jsonInterfaceMethodToString],
      _flattenTypes: [Function: _flattenTypes],
      randomHex: [Function: randomHex],
      BN: [Function],
      isBN: [Function: isBN],
      isBigNumber: [Function: isBigNumber],
      isHex: [Function: isHex],
      isHexStrict: [Function: isHexStrict],
      sha3: [Function],
      sha3Raw: [Function: sha3Raw],
      keccak256: [Function],
      soliditySha3: [Function: soliditySha3],
      soliditySha3Raw: [Function: soliditySha3Raw],
      encodePacked: [Function: encodePacked],
      isAddress: [Function: isAddress],
      checkAddressChecksum: [Function: checkAddressChecksum],
      toChecksumAddress: [Function: toChecksumAddress],
      toHex: [Function: toHex],
      toBN: [Function: toBN],
      bytesToHex: [Function: bytesToHex],
      hexToBytes: [Function: hexToBytes],
      hexToNumberString: [Function: hexToNumberString],
      hexToNumber: [Function: hexToNumber],
      toDecimal: [Function: hexToNumber],
      numberToHex: [Function: numberToHex],
      fromDecimal: [Function: numberToHex],
      hexToUtf8: [Function: hexToUtf8],
      hexToString: [Function: hexToUtf8],
      toUtf8: [Function: hexToUtf8],
      stripHexPrefix: [Function: stripHexPrefix],
      utf8ToHex: [Function: utf8ToHex],
      stringToHex: [Function: utf8ToHex],
      fromUtf8: [Function: utf8ToHex],
      hexToAscii: [Function: hexToAscii],
      toAscii: [Function: hexToAscii],
      asciiToHex: [Function: asciiToHex],
      fromAscii: [Function: asciiToHex],
      unitMap: [Object],
      toWei: [Function: toWei],
      fromWei: [Function: fromWei],
      padLeft: [Function: leftPad],
      leftPad: [Function: leftPad],
      padRight: [Function: rightPad],
      rightPad: [Function: rightPad],
      toTwosComplement: [Function: toTwosComplement],
      isBloom: [Function: isBloom],
      isUserEthereumAddressInBloom: [Function: isUserEthereumAddressInBloom],
      isContractAddressInBloom: [Function: isContractAddressInBloom],
      isTopic: [Function: isTopic],
      isTopicInBloom: [Function: isTopicInBloom],
      isInBloom: [Function: isInBloom],
      compareBlockNumbers: [Function: compareBlockNumbers],
      toNumber: [Function: toNumber]
    },
    Method: [Function: Method]
  },
  handleRevert: [Getter/Setter],
  defaultCommon: [Getter/Setter],
  defaultHardfork: [Getter/Setter],
  defaultChain: [Getter/Setter],
  transactionPollingTimeout: [Getter/Setter],
  transactionConfirmationBlocks: [Getter/Setter],
  transactionBlockTimeout: [Getter/Setter],
  defaultAccount: [Getter/Setter],
  defaultBlock: [Getter/Setter],
  maxListenersWarningThreshold: [Getter/Setter],
  clearSubscriptions: [Function: bound ],
  removeSubscriptionById: [Function: bound ],
  net: Net {
    currentProvider: [Getter/Setter],
    _requestManager: RequestManager {
      provider: [HttpProvider],
      providers: [Object],
      subscriptions: Map(0) {}
    },
    givenProvider: null,
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    _provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    setProvider: [Function (anonymous)],
    setRequestManager: [Function (anonymous)],
    BatchRequest: [Function: bound Batch],
    extend: [Function: ex] {
      formatters: [Object],
      utils: [Object],
      Method: [Function: Method]
    },
    getId: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'net_version'
    },
    isListening: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'net_listening'
    },
    getPeerCount: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'net_peerCount'
    },
    getNetworkType: [Function: bound getNetworkType]
  },
  accounts: <ref *1> Accounts {
    currentProvider: [Getter/Setter],
    _requestManager: RequestManager {
      provider: [HttpProvider],
      providers: [Object],
      subscriptions: Map(0) {}
    },
    givenProvider: null,
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    _provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    setProvider: [Function (anonymous)],
    setRequestManager: [Function (anonymous)],
    _ethereumCall: {
      getNetworkId: [Function],
      getChainId: [Function],
      getGasPrice: [Function],
      getTransactionCount: [Function],
      getBlockByNumber: [Function]
    },
    wallet: Wallet {
      _accounts: [Circular *1],
      length: 0,
      defaultKeyName: 'web3js_wallet'
    }
  },
  personal: Personal {
    currentProvider: [Getter/Setter],
    _requestManager: RequestManager {
      provider: [HttpProvider],
      providers: [Object],
      subscriptions: Map(0) {}
    },
    givenProvider: null,
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    _provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    setProvider: [Function (anonymous)],
    setRequestManager: [Function (anonymous)],
    BatchRequest: [Function: bound Batch],
    extend: [Function: ex] {
      formatters: [Object],
      utils: [Object],
      Method: [Function: Method]
    },
    net: Net {
      currentProvider: [Getter/Setter],
      _requestManager: [RequestManager],
      givenProvider: null,
      providers: [Object],
      _provider: null,
      setProvider: [Function (anonymous)],
      setRequestManager: [Function (anonymous)],
      BatchRequest: [Function: bound Batch],
      extend: [Function],
      getId: [Function],
      isListening: [Function],
      getPeerCount: [Function]
    },
    defaultAccount: [Getter/Setter],
    defaultBlock: [Getter/Setter],
    getAccounts: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_listAccounts'
    },
    newAccount: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_newAccount'
    },
    unlockAccount: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_unlockAccount'
    },
    lockAccount: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_lockAccount'
    },
    importRawKey: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_importRawKey'
    },
    sendTransaction: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_sendTransaction'
    },
    signTransaction: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_signTransaction'
    },
    sign: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_sign'
    },
    ecRecover: [Function: send] {
      method: [Method],
      request: [Function: bound ],
      call: 'personal_ecRecover'
    }
  },
  Contract: [Function: Contract] {
    setProvider: [Function (anonymous)],
    defaultAccount: null,
    defaultBlock: 'latest',
    transactionBlockTimeout: 50,
    transactionConfirmationBlocks: 24,
    transactionPollingTimeout: 750,
    handleRevert: false,
    _requestManager: RequestManager {
      provider: [HttpProvider],
      providers: [Object],
      subscriptions: Map(0) {}
    },
    _ethAccounts: <ref *1> Accounts {
      currentProvider: [Getter/Setter],
      _requestManager: [RequestManager],
      givenProvider: null,
      providers: [Object],
      _provider: [HttpProvider],
      setProvider: [Function (anonymous)],
      setRequestManager: [Function (anonymous)],
      _ethereumCall: [Object],
      wallet: [Wallet]
    },
    currentProvider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    }
  },
  Iban: [class Iban],
  abi: ABICoder {},
  ens: ENS {
    eth: [Circular *2],
    _detectedAddress: null,
    _lastSyncCheck: null,
    registry: [Getter],
    resolverMethodHandler: [Getter],
    registryAddress: [Getter/Setter]
  },
  getNodeInfo: [Function: send] {
    method: Method {
      name: 'getNodeInfo',
      call: 'web3_clientVersion',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'web3_clientVersion'
  },
  getProtocolVersion: [Function: send] {
    method: Method {
      name: 'getProtocolVersion',
      call: 'eth_protocolVersion',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_protocolVersion'
  },
  getCoinbase: [Function: send] {
    method: Method {
      name: 'getCoinbase',
      call: 'eth_coinbase',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_coinbase'
  },
  isMining: [Function: send] {
    method: Method {
      name: 'isMining',
      call: 'eth_mining',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_mining'
  },
  getHashrate: [Function: send] {
    method: Method {
      name: 'getHashrate',
      call: 'eth_hashrate',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: hexToNumber],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_hashrate'
  },
  isSyncing: [Function: send] {
    method: Method {
      name: 'isSyncing',
      call: 'eth_syncing',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: outputSyncingFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_syncing'
  },
  getGasPrice: [Function: send] {
    method: Method {
      name: 'getGasPrice',
      call: 'eth_gasPrice',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: outputBigNumberFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_gasPrice'
  },
  getFeeHistory: [Function: send] {
    method: Method {
      name: 'getFeeHistory',
      call: 'eth_feeHistory',
      params: 3,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_feeHistory'
  },
  getAccounts: [Function: send] {
    method: Method {
      name: 'getAccounts',
      call: 'eth_accounts',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: toChecksumAddress],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_accounts'
  },
  getBlockNumber: [Function: send] {
    method: Method {
      name: 'getBlockNumber',
      call: 'eth_blockNumber',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: hexToNumber],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_blockNumber'
  },
  getBalance: [Function: send] {
    method: Method {
      name: 'getBalance',
      call: 'eth_getBalance',
      params: 2,
      inputFormatter: [Array],
      outputFormatter: [Function: outputBigNumberFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getBalance'
  },
  getStorageAt: [Function: send] {
    method: Method {
      name: 'getStorageAt',
      call: 'eth_getStorageAt',
      params: 3,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getStorageAt'
  },
  getCode: [Function: send] {
    method: Method {
      name: 'getCode',
      call: 'eth_getCode',
      params: 2,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getCode'
  },
  getBlock: [Function: send] {
    method: Method {
      name: 'getBlock',
      call: [Function: blockCall],
      params: 2,
      inputFormatter: [Array],
      outputFormatter: [Function (anonymous)],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: [Function: blockCall]
  },
  getUncle: [Function: send] {
    method: Method {
      name: 'getUncle',
      call: [Function: uncleCall],
      params: 2,
      inputFormatter: [Array],
      outputFormatter: [Function: outputBlockFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: [Function: uncleCall]
  },
  getBlockTransactionCount: [Function: send] {
    method: Method {
      name: 'getBlockTransactionCount',
      call: [Function: getBlockTransactionCountCall],
      params: 1,
      inputFormatter: [Array],
      outputFormatter: [Function: hexToNumber],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: [Function: getBlockTransactionCountCall]
  },
  getBlockUncleCount: [Function: send] {
    method: Method {
      name: 'getBlockUncleCount',
      call: [Function: uncleCountCall],
      params: 1,
      inputFormatter: [Array],
      outputFormatter: [Function: hexToNumber],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: [Function: uncleCountCall]
  },
  getTransaction: [Function: send] {
    method: Method {
      name: 'getTransaction',
      call: 'eth_getTransactionByHash',
      params: 1,
      inputFormatter: [Array],
      outputFormatter: [Function (anonymous)],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getTransactionByHash'
  },
  getTransactionFromBlock: [Function: send] {
    method: Method {
      name: 'getTransactionFromBlock',
      call: [Function: transactionFromBlockCall],
      params: 2,
      inputFormatter: [Array],
      outputFormatter: [Function: outputTransactionFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: [Function: transactionFromBlockCall]
  },
  getTransactionReceipt: [Function: send] {
    method: Method {
      name: 'getTransactionReceipt',
      call: 'eth_getTransactionReceipt',
      params: 1,
      inputFormatter: [Array],
      outputFormatter: [Function (anonymous)],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getTransactionReceipt'
  },
  getTransactionCount: [Function: send] {
    method: Method {
      name: 'getTransactionCount',
      call: 'eth_getTransactionCount',
      params: 2,
      inputFormatter: [Array],
      outputFormatter: [Function: hexToNumber],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getTransactionCount'
  },
  sendSignedTransaction: [Function: send] {
    method: Method {
      name: 'sendSignedTransaction',
      call: 'eth_sendRawTransaction',
      params: 1,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: ABICoder {},
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_sendRawTransaction'
  },
  signTransaction: [Function: send] {
    method: Method {
      name: 'signTransaction',
      call: 'eth_signTransaction',
      params: 1,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_signTransaction'
  },
  sendTransaction: [Function: send] {
    method: Method {
      name: 'sendTransaction',
      call: 'eth_sendTransaction',
      params: 1,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: ABICoder {},
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_sendTransaction'
  },
  sign: [Function: send] {
    method: Method {
      name: 'sign',
      call: 'eth_sign',
      params: 2,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: [Function: transformPayload],
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_sign'
  },
  call: [Function: send] {
    method: Method {
      name: 'call',
      call: 'eth_call',
      params: 2,
      inputFormatter: [Array],
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: ABICoder {},
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_call'
  },
  estimateGas: [Function: send] {
    method: Method {
      name: 'estimateGas',
      call: 'eth_estimateGas',
      params: 1,
      inputFormatter: [Array],
      outputFormatter: [Function: hexToNumber],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_estimateGas'
  },
  submitWork: [Function: send] {
    method: Method {
      name: 'submitWork',
      call: 'eth_submitWork',
      params: 3,
      inputFormatter: undefined,
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_submitWork'
  },
  getWork: [Function: send] {
    method: Method {
      name: 'getWork',
      call: 'eth_getWork',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: undefined,
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getWork'
  },
  getPastLogs: [Function: send] {
    method: Method {
      name: 'getPastLogs',
      call: 'eth_getLogs',
      params: 1,
      inputFormatter: [Array],
      outputFormatter: [Function: outputLogFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getLogs'
  },
  getChainId: [Function: send] {
    method: Method {
      name: 'getChainId',
      call: 'eth_chainId',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: hexToNumber],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_chainId'
  },
  requestAccounts: [Function: send] {
    method: Method {
      name: 'requestAccounts',
      call: 'eth_requestAccounts',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: toChecksumAddress],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_requestAccounts'
  },
  getProof: [Function: send] {
    method: Method {
      name: 'getProof',
      call: 'eth_getProof',
      params: 3,
      inputFormatter: [Array],
      outputFormatter: [Function: outputProofFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_getProof'
  },
  getPendingTransactions: [Function: send] {
    method: Method {
      name: 'getPendingTransactions',
      call: 'eth_pendingTransactions',
      params: 0,
      inputFormatter: undefined,
      outputFormatter: [Function: outputTransactionFormatter],
      transformPayload: undefined,
      extraFormatters: undefined,
      abiCoder: undefined,
      requestManager: [RequestManager],
      accounts: [Accounts],
      defaultBlock: 'latest',
      defaultAccount: null,
      transactionBlockTimeout: 50,
      transactionConfirmationBlocks: 24,
      transactionPollingTimeout: 750,
      defaultCommon: undefined,
      defaultChain: undefined,
      defaultHardfork: undefined,
      handleRevert: false
    },
    request: [Function: bound ],
    call: 'eth_pendingTransactions'
  },
  subscribe: [Function (anonymous)]
}

- eth.get 입력후 tab 하면 사용할 수 있는 함수들을 확인 할 수 있음.

truffle(development)> eth.getAccounts()

-ganache-cli 시작시의 주소와 일치

 

truffle(development)> eth.getBalance('0x84F43c88Dc56510D043D5EE922D57549959c4C3C')

- 두번째 계정의 잔액이 확인됨

truffle(development)> eth.getBalance('0x84F43c88Dc56510D043D5EE922D57549959c4C3C')
'100000000000000000000'

 

truffle를 활용한 스마트 컨트랙트 상호작용

ruffle(development)> Lottery. 입력 후 tab 하면 사용할 수 있는 변수들 확인 가능.

 

truffle(development)> Lottery.address

truffle(development)> Lottery.address
'0xED43Bcf94743F0248d896D52A9693F775FE3642C'

- 위의 주소 정보를 가져오는 곳 : buid/contracts/Lottery.json에서 확인 할 수 있음.

 

truffle(development)> Lottery.deployed().then(function(instance){lt=instance})

- lt 변수에 할당

 

truffle(development)> lt

truffle(development)> lt
TruffleContract {
  constructor: [Function: TruffleContract] {
    _constructorMethods: {
      configureNetwork: [Function: configureNetwork],
      setProvider: [Function: setProvider],
      new: [Function: new],
      at: [AsyncFunction: at],
      deployed: [AsyncFunction: deployed],
      defaults: [Function: defaults],
      hasNetwork: [Function: hasNetwork],
      isDeployed: [Function: isDeployed],
      detectNetwork: [AsyncFunction: detectNetwork],
      setNetwork: [Function: setNetwork],
      setNetworkType: [Function: setNetworkType],
      setWallet: [Function: setWallet],
      resetAddress: [Function: resetAddress],
      link: [Function: link],
      clone: [Function: clone],
      addProp: [Function: addProp],
      toJSON: [Function: toJSON],
      decodeLogs: [Function: decodeLogs]
    },
    _properties: {
      contract_name: [Object],
      contractName: [Object],
      gasMultiplier: [Object],
      timeoutBlocks: [Object],
      autoGas: [Object],
      numberFormat: [Object],
      abi: [Object],
      metadata: [Function: metadata],
      network: [Function: network],
      networks: [Function: networks],
      address: [Object],
      transactionHash: [Object],
      links: [Function: links],
      events: [Function: events],
      binary: [Function: binary],
      deployedBinary: [Function: deployedBinary],
      unlinked_binary: [Object],
      bytecode: [Object],
      deployedBytecode: [Object],
      sourceMap: [Object],
      deployedSourceMap: [Object],
      source: [Object],
      sourcePath: [Object],
      legacyAST: [Object],
      ast: [Object],
      compiler: [Object],
      schema_version: [Function: schema_version],
      schemaVersion: [Function: schemaVersion],
      updated_at: [Function: updated_at],
      updatedAt: [Function: updatedAt],
      userdoc: [Function: userdoc],
      devdoc: [Function: devdoc],
      networkType: [Object],
      immutableReferences: [Object],
      generatedSources: [Object],
      deployedGeneratedSources: [Object],
      db: [Object]
    },
    _property_values: {},
    _json: {
      contractName: 'Lottery',
      abi: [Array],
      metadata: '{"compiler":{"version":"0.8.11+commit.d7f03943"},"language":"Solidity","output":{"abi":[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"getSomeValue","outputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}],"devdoc":{"kind":"dev","methods":{},"version":1},"userdoc":{"kind":"user","methods":{},"version":1}},"settings":{"compilationTarget":{"project:/contracts/Lottery.sol":"Lottery"},"evmVersion":"london","libraries":{},"metadata":{"bytecodeHash":"ipfs"},"optimizer":{"enabled":false,"runs":200},"remappings":[]},"sources":{"project:/contracts/Lottery.sol":{"keccak256":"0x32a618b7d01a651fa8bf8a2f5ee76dfe9cb1ee7be3d1749339c743d76188d595","urls":["bzz-raw://100e2b597949b8a21b67ef233ec781f96b6dd7cbb43aabafd49b01f602067443","dweb:/ipfs/QmNs6oPix8Lokk9TLQKaYDurbMHHEbpPr2GV9P2WRSnDsT"]}},"version":1}',
      bytecode: '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',
      deployedBytecode: '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',
      immutableReferences: {},
      generatedSources: [],
      deployedGeneratedSources: [Array],
      sourceMap: '36:598:0:-:0;;;346:199;;;;;;;;;;382:10;374:5;;:18;;;;;;;;;;;;;;;;;;36:598;;;;;;',
      deployedSourceMap: '36:598:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;221:20;;;:::i;:::-;;;;;;;:::i;:::-;;;;;;;;551:80;;;:::i;:::-;;;;;;;:::i;:::-;;;;;;;;221:20;;;;;;;;;;;;:::o;551:80::-;596:13;624:1;617:8;;551:80;:::o;7:126:2:-;44:7;84:42;77:5;73:54;62:65;;7:126;;;:::o;139:96::-;176:7;205:24;223:5;205:24;:::i;:::-;194:35;;139:96;;;:::o;241:118::-;328:24;346:5;328:24;:::i;:::-;323:3;316:37;241:118;;:::o;365:222::-;458:4;496:2;485:9;481:18;473:26;;509:71;577:1;566:9;562:17;553:6;509:71;:::i;:::-;365:222;;;;:::o;593:77::-;630:7;659:5;648:16;;593:77;;;:::o;676:118::-;763:24;781:5;763:24;:::i;:::-;758:3;751:37;676:118;;:::o;800:222::-;893:4;931:2;920:9;916:18;908:26;;944:71;1012:1;1001:9;997:17;988:6;944:71;:::i;:::-;800:222;;;;:::o',
      source: 'pragma solidity >=0.4.22 <0.9.0;\r\n' +
        '\r\n' +
        'contract Lottery {\r\n' +
        '  //주소를 오너로 설정\r\n' +
        '  //public : 자동으로 getter를 만들어 준다, 스마트 컨트랙트 외부에서 바로 오너의 값을 알 수 있다.\r\n' +
        '  address public owner;\r\n' +
        '\r\n' +
        '//스마트 컨트랙트가 생성될 때,, 배포가 될때, 가장 먼저 실행되는 함수.\r\n' +
        '  constructor() public {\r\n' +
        '    owner = msg.sender;\r\n' +
        '    // 배포가 될 때, 보낸사람을 오너로 저장하겠다.\r\n' +
        '    // msg.sender : 스마트 컨트랙트에서 사용하는 전역변수 \r\n' +
        '  }\r\n' +
        '\r\n' +
        '  function getSomeValue() public pure returns (uint256 value){\r\n' +
        '    return 5;\r\n' +
        '  }\r\n' +
        '}',
      sourcePath: 'C:\\Users\\coco\\Desktop\\coco\\studying_solidity\\lotteryDapp\\contracts\\Lottery.sol',
      ast: [Object],
      legacyAST: [Object],
      compiler: [Object],
      networks: [Object],
      schemaVersion: '3.4.4',
      updatedAt: '2022-02-13T10:40:52.826Z',
      networkType: 'ethereum',
      devdoc: [Object],
      userdoc: [Object],
      db: undefined
    },
    configureNetwork: [Function: bound configureNetwork],
    setProvider: [Function: bound setProvider],
    new: [Function: bound new] {
      estimateGas: [Function: bound estimateDeployment],
      request: [Function: bound requestDeployment]
    },
    at: [Function: bound at] AsyncFunction,
    deployed: [Function: bound deployed] AsyncFunction,
    defaults: [Function: bound defaults],
    hasNetwork: [Function: bound hasNetwork],
    isDeployed: [Function: bound isDeployed],
    detectNetwork: [Function: bound detectNetwork] AsyncFunction,
    setNetwork: [Function: bound setNetwork],
    setNetworkType: [Function: bound setNetworkType],
    setWallet: [Function: bound setWallet],
    resetAddress: [Function: bound resetAddress],
    link: [Function: bound link],
    clone: [Function: bound clone],
    addProp: [Function: bound addProp],
    toJSON: [Function: bound toJSON],
    decodeLogs: [Function: bound decodeLogs],
    enums: {},
    class_defaults: { from: '0xF76c9B7012c0A3870801eaAddB93B6352c8893DB' },
    interfaceAdapter: Web3InterfaceAdapter { web3: [Web3Shim] },
    web3: Web3Shim {
      currentProvider: [Getter/Setter],
      _requestManager: [RequestManager],
      givenProvider: null,
      providers: [Object],
      _provider: [HttpProvider],
      setProvider: [Function (anonymous)],
      setRequestManager: [Function (anonymous)],
      BatchRequest: [Function: bound Batch],
      extend: [Function],
      version: '1.5.3',
      utils: [Object],
      eth: [Eth],
      shh: [Shh],
      bzz: [Bzz],
      networkType: 'ethereum'
    },
    currentProvider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    network_id: '1644748750946',
    disableConfirmationListener: undefined,
    ens: { enabled: false, registryAddress: null }
  },
  methods: {
    'owner()': [Function (anonymous)] {
      call: [Function (anonymous)],
      sendTransaction: [Function (anonymous)],
      estimateGas: [Function (anonymous)],
      request: [Function (anonymous)]
    },
    'getSomeValue()': [Function (anonymous)] {
      call: [Function (anonymous)],
      sendTransaction: [Function (anonymous)],
      estimateGas: [Function (anonymous)],
      request: [Function (anonymous)]
    }
  },
  abi: [
    {
      inputs: [],
      stateMutability: 'nonpayable',
      type: 'constructor',
      constant: undefined,
      payable: undefined
    },
    {
      inputs: [],
      name: 'owner',
      outputs: [Array],
      stateMutability: 'view',
      type: 'function',
      constant: true,
      payable: undefined,
      signature: '0x8da5cb5b'
    },
    {
      inputs: [],
      name: 'getSomeValue',
      outputs: [Array],
      stateMutability: 'pure',
      type: 'function',
      constant: true,
      payable: undefined,
      signature: '0xa40674b7'
    }
  ],
  address: '0xED43Bcf94743F0248d896D52A9693F775FE3642C',
  transactionHash: undefined,
  contract: Contract {
    setProvider: [Function (anonymous)],
    currentProvider: [Getter/Setter],
    _requestManager: RequestManager {
      provider: [HttpProvider],
      providers: [Object],
      subscriptions: Map(0) {}
    },
    givenProvider: null,
    providers: {
      WebsocketProvider: [Function: WebsocketProvider],
      HttpProvider: [Function: HttpProvider],
      IpcProvider: [Function: IpcProvider]
    },
    _provider: HttpProvider {
      withCredentials: false,
      timeout: 0,
      headers: undefined,
      agent: undefined,
      connected: true,
      host: 'http://127.0.0.1:8545',
      httpAgent: [Agent],
      send: [Function (anonymous)],
      _alreadyWrapped: true
    },
    setRequestManager: [Function (anonymous)],
    BatchRequest: [Function: bound Batch],
    extend: [Function: ex] {
      formatters: [Object],
      utils: [Object],
      Method: [Function: Method]
    },
    clearSubscriptions: [Function (anonymous)],
    options: { address: [Getter/Setter], jsonInterface: [Getter/Setter] },
    handleRevert: [Getter/Setter],
    defaultCommon: [Getter/Setter],
    defaultHardfork: [Getter/Setter],
    defaultChain: [Getter/Setter],
    transactionPollingTimeout: [Getter/Setter],
    transactionConfirmationBlocks: [Getter/Setter],
    transactionBlockTimeout: [Getter/Setter],
    defaultAccount: [Getter/Setter],
    defaultBlock: [Getter/Setter],
    methods: {
      owner: [Function: bound _createTxObject],
      '0x8da5cb5b': [Function: bound _createTxObject],
      'owner()': [Function: bound _createTxObject],
      getSomeValue: [Function: bound _createTxObject],
      '0xa40674b7': [Function: bound _createTxObject],
      'getSomeValue()': [Function: bound _createTxObject]
    },
    events: { allEvents: [Function: bound ] },
    _address: '0xED43Bcf94743F0248d896D52A9693F775FE3642C',
    _jsonInterface: [ [Object], [Object], [Object] ]
  },
  owner: [Function (anonymous)] {
    call: [Function (anonymous)],
    sendTransaction: [Function (anonymous)],
    estimateGas: [Function (anonymous)],
    request: [Function (anonymous)]
  },
  getSomeValue: [Function (anonymous)] {
    call: [Function (anonymous)],
    sendTransaction: [Function (anonymous)],
    estimateGas: [Function (anonymous)],
    request: [Function (anonymous)]
  },
  sendTransaction: [Function (anonymous)],
  send: [Function (anonymous)],
  allEvents: [Function (anonymous)],
  getPastEvents: [Function (anonymous)]
}

truffle(development)> lt. 작성 후 tab tab

사용할 수 있는 변수들을 확인할 수 있음.

truffle(development)> lt.abi

-abi

: 일반적인 랭귀지에서 볼 수 있는 인터페이스.

: 외부에서 접근할 때, 이 스마트 컨트랙트에서는 어떤 함수에 접근할 수 있고, 해당 함수의 파라미터는 무엇인지, 리턴 값은 무엇인지 확인할 수 있음.

truffle(development)> lt.owner()

- getter function 이므로 괄호를 사용해야 값을 볼 수 있음.

truffle(development)> eth.getAccounts()

- 첫 번째 계정을 오너로

truffle(development)> lt.getSomeValue()

- BN : big number

- 이더리움에서는 다루는 숫자가 엄청 크기 때문에, BN를 사용하여 숫자처리를 많이함.

- BN 라이브러리를 사용하거나, 파라미터로 넣어줄때는 스트링값으로 넣어주면 geth단에서 스트링을 BN로 넘겨 사용할 수 있음.

truffle(development)> lt.getSomeValue()
BN { negative: 0, words: [ 5, <1 empty item> ], length: 1, red: null }

 

 

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