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BlockchainContractValue  (for Ethereum)

$BlockchainBase = "Ethereum"

BlockchainContractValue[caddr]

从以太坊区块链地址 caddr 的包含 Wolfram 表达式的合约中获取结果.

BlockchainContractValue[caddr,prop]

获取从地址为 caddr 的包含 Wolfram 表达式的合约中获得的结果的属性 prop.

BlockchainContractValue[caddr,func]

调用地址为 caddr 的合约的函数 func.

BlockchainContractValue[caddr,assoc]

调用地址为 caddr 的合约，其属性由 Association assoc 定义.

更多信息

  • 给出以太坊合约的基本信息. 默认情况下，给出的是最新区块的状态.
  • BlockchainContractValue 可访问以太坊 mainnet（默认）和 testnet (sepolia). 想要指定这些网络，可以使用 BlockchainBase 选项.
  • BlockchainContractValue 从以太坊区块链提取合约，然后运行指定的函数. 它不能往区块链中写入数据；可用 BlockchainTransactionSubmit 写入数据.
  • BlockchainContractValue[caddr,func] 调用合约函数，其中 func 必须是定义函数名称和输出数据类型的 Typed 表达式.
  • BlockchainContractValue[caddr,assoc] 调用带有附加参数的合约，其中，关联 assoc 必须具有以下属性：
  • "Function"定义要调用的函数的 Typed 表达式
  • 此外，关联 assoc 可以有以下属性：
  • "Inputs"要调用的函数的输入参数
    "Sender"正在调用合约的发送者的地址
    "BlockNumber"与区块链特定状态关联的区块号
  • 如果无法在给定地址的合约中成功计算某个特定函数，BlockchainContractValue 返回 Missing["NoResult"].

范例

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基本范例  (5)

给定地址，调用函数 name、symbol 和 decimals：

Wolfram Language code: address = "f230b790E05390FC8295F4d3F60332c93BEd42e2";
Wolfram Language code: BlockchainContractValue[address, Typed["name", "string"], BlockchainBase -> {"Ethereum", "Mainnet"}]
Wolfram Language code: BlockchainContractValue[address, Typed["symbol", "string"], BlockchainBase -> {"Ethereum", "Mainnet"}]
Wolfram Language code: BlockchainContractValue[address, Typed["decimals", "uint256"], BlockchainBase -> {"Ethereum", "Mainnet"}]

获取以前部署的包含 Wolfram 表达式的合约的结果：

Wolfram Language code: address = "cEf2Ba8C04343566867d1c3e5948efE4aC800E7b";
Wolfram Language code: BlockchainContractValue[address, "Result", BlockchainBase -> {"Ethereum", "Testnet"}]

通过地址验证 OmiseGo 通证的总供应量：

Wolfram Language code: omgtoken = First[BlockchainTokenData["OMGToken", "TokenAddress", BlockchainBase -> {"Ethereum", "Mainnet"}]]
Wolfram Language code: BlockchainContractValue[omgtoken, Typed["totalSupply", "uint256"], BlockchainBase -> {"Ethereum", "Mainnet"}]

查看某个持有者的 OMG 通证的余额：

Wolfram Language code: omgtoken = First[BlockchainTokenData["OMGToken", "TokenAddress", BlockchainBase -> {"Ethereum", "Mainnet"}]]
Wolfram Language code: sender = RandomChoice[First[BlockchainTokenData["OMGToken", "TransferList", BlockchainBase -> "Ethereum"]]]["Sender"]
Wolfram Language code: BlockchainContractValue[omgtoken, <|"Function" -> Typed["balanceOf", "address" -> "uint256"], "Inputs" -> sender|>, BlockchainBase -> {"Ethereum", "Mainnet"}]

查看区块 6000000 被挖出时持有者的余额：

Wolfram Language code: BlockchainContractValue[omgtoken, <|"Function" -> Typed["balanceOf", "address" -> "uint256"], "Inputs" -> sender, "BlockNumber" -> 6000000|>, BlockchainBase -> {"Ethereum", "Mainnet"}]

查看售卖期间 Token ID 为 883551 的 CryptoKitty 拍卖的情况：

Wolfram Language code: BlockchainContractValue["b1690C08E213a35Ed9bAb7B318DE14420FB57d8C", <|"Function" -> Typed["getAuction", "uint256" -> {"address", "uint256", "uint256", "uint256", "uint256"}], "Inputs" -> 883551|>, BlockchainBase -> {"Ethereum", "Mainnet"}]

选项  (2)

BlockchainBase  (2)

Mainnet  (1)

通过地址获取 CryptoKitties 通证的总供应量：

Wolfram Language code: address = "06012c8cf97BEaD5deAe237070F9587f8E7A266d";
Wolfram Language code: BlockchainContractValue[address, Typed["totalSupply", "uint256"], BlockchainBase -> {"Ethereum", "Mainnet"}]

Testnet  (1)

获取以前部署的合约的价值：

Wolfram Language code: BlockchainContractValue["0xE8c9b0a7dc69cc39d2Bc528Bb6509D052fff37CD", <|"Function" -> Typed["MAX_TWITT_LENGTH", {} -> {"uint16"}]|>, BlockchainBase -> {"Ethereum", "Testnet"}]
Wolfram Research (2019)，BlockchainContractValue，Wolfram 语言函数，https://reference.wolfram.com/language/ref/blockchain/BlockchainContractValue-Ethereum.html.

文本

Wolfram Research (2019)，BlockchainContractValue，Wolfram 语言函数，https://reference.wolfram.com/language/ref/blockchain/BlockchainContractValue-Ethereum.html.

CMS

Wolfram 语言. 2019. "BlockchainContractValue." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/blockchain/BlockchainContractValue-Ethereum.html.

APA

Wolfram 语言. (2019). BlockchainContractValue. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/blockchain/BlockchainContractValue-Ethereum.html 年

BibTeX

@misc{reference.wolfram_2026_blockchaincontractvalue, author="Wolfram Research", title="{BlockchainContractValue}", year="2019", howpublished="\url{https://reference.wolfram.com/language/ref/blockchain/BlockchainContractValue-Ethereum.html}", note=[Accessed: 17-August-2026]}

BibLaTeX

@online{reference.wolfram_2026_blockchaincontractvalue, organization={Wolfram Research}, title={BlockchainContractValue}, year={2019}, url={https://reference.wolfram.com/language/ref/blockchain/BlockchainContractValue-Ethereum.html}, note=[Accessed: 17-August-2026]}