Smart Contracts – 智能合约区块链毕设代写

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Smart Contracts

Proof of Existence

This smart contract allows for senders to notarize documents. A hash of the document is computed and then stored in the contract’s state. Note that the content of the document is sent within the transaction to notarize it, therefore it is public and influences the cost of the transaction.

Based on blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum.

Multisig Wallet

This contract allows a set of owners (defined during the contract’s initialization) to submit, confirm and revoke transactions. A transaction is then executed if and only if it has been confirmed by a quorum of owners (also set during the initialization).

It is possible to send a transaction either to an EOA or to a contract account. In the latter case, it is possible to set the data field of the transaction (e.g. function signature and parameters). For this transaction not to fail, see the documentation of the ExecutionFailed event of this contract for a few things to keep in mind.

Based on ConsenSys-Academy/multisig-wallet-exercise and ConsenSysMesh/MultiSigWallet.

Implement test to buy item without sufficient funds


Smart Contracts

Proof of Existence

此智能合约允许发件人对文档进行公证。计算文档的哈希值,然后将其存储在合同状态中。请注意,文件的内容是在交易中发送的,以对其进行公证,因此它是公开的,并影响交易的成本

基于blog.openzeppelin.com/the-hitchhikers-guide-to-smart-contracts-in-ethereum

Multisig Wallet

此合同允许一组所有者(在合同初始化期间定义)提交、确认和撤销交易。当且仅当事务已由所有者的仲裁(也在初始化期间设置)确认时,才会执行事务

可以将交易发送到EOA或合同账户。在后一种情况下,可以设置事务的数据字段(例如函数签名和参数)。要使此事务不失败,请参阅此合同的ExecutionFailed事件的文档,了解需要记住的几点

基于ConsenSys Academy/multisig wallet练习和ConsenSysMesh/MultiSigWallet

Implement test to buy item without sufficient funds

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