In order to allow this interface to be called outside the smart contract, you need to prepare the abi file. The smart contract contains an interface that receives an input and then outputs hello, + enter. e.g HelloWorld.js class HelloWorld // needs to provide an init function that will be called during deployment Hello world Preparing the codeįirst prepare a JavaScript class. Since the admin key file is already provided for the local debug chain, you can also directly use it like 'iwallet -key_file config/dev_admin_key.json'. # remember this file location, you provide it in later commands like iwallet -key_file admin.json Method 2: Use specified key store file location iwallet account import admin 2yquS3ySrGWPEKywCPzX4RTJugqRh7kJSo5aehsLYPEWkUxBWA39oMrZ7ZxuM4fgyXYs2cPwh5n8aNNpH5x2VyK1 -key_file admin.json Later 'iwallet -account admin' command will lookup account key store json inside ~/.iwallet folder and find the correct file. iwallet account import admin 2yquS3ySrGWPEKywCPzX4RTJugqRh7kJSo5aehsLYPEWkUxBWA39oMrZ7ZxuM4fgyXYs2cPwh5n8aNNpH5x2VyK1Īfter this command, the key store json file will written into ~/.iwallet/admin.json. You can import the 'admin' account for the local test node. In order to complete the test, you need to import an account for iwallet. Method 1: Import key store file into default location
#SMAART 7 QUICK START HOW TO#
You have two methods on how to use account key store file. Importing the initial account admin for iwallet At the same time, starting a local test node can facilitate debugging. The development and deployment of smart contracts requires iwallet. Transaction, the state on the blockchain must be modified by submitting tx, tx is packaged into the blockĭebug environment configuration Setup iwallet and local test node Smart Contract Interface, which can only be called externally via a declared interface
#SMAART 7 QUICK START SERIAL#
All transactions will generate a strict serial on the chain, preventing double-spend attacks. External can only read its storage content.Įvery transaction includes multiple transactional actions, and each action is a call to an ABI.
#SMAART 7 QUICK START CODE#
Currently, we are opening JavaScript(ES6) with v8 engine, and there are native golang VM modules to handle high-performance transactions but only for system contracts now.Īn IOST smart contract contains code for smart contracts and a JSON file to describe the ABI, which has its own namespace and isolated storage. IOST achieved multi-language smart contracts.
Smart contracts receive and execute transactions within the block, in order to maintain the variables of smart contract insides blockchain and produce irreversible proof. Due to the characteristics of the blockchain, the call of the smart contract can be guaranteed to be serial and globally consistent. A smart contract is code that executes on a blockchain system and changes the state in the state machine through transactions.
Getting Start of Smart Contract development IOST Smart Contract BasicsĪ blockchain can be abstracted as a state machine that is synchronized across the network.
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