Dapple is a Solidity developer multitool designed to manage the growing complexity of interconnected smart contract systems.
Its core functionality encompasses three main areas:
- Package management
- Contract building
- Deployment scripting
These concepts are related in a way unique to the smart contract ecosystem, due to each blockchain's universal singleton nature.
The central data model for Dapple is the dappfile, whose definition
will normally reference IPFS objects and Ethereum contract addresses.
The normal way to install Dapple is through npm:
$ npm install -g dapple
$ dapple --help
You can read about detailed system specific installation on the documentation.
Use dapple init to generate a project skeleton:
mkdir foo;
cd foo;
dapple init
By default, build/ is where the output of dapple build gets put,
and contracts/ is where Dapple looks for your contract source files.
Both of these are configured in your dappfile and can be overridden.
Now try writing a contract and a test (see Dapple test harness docs):
$ vim contracts/dapp.sol
$ vim contracts/dapp_test.sol
$ dapple test
Finally, try building your project:
$ dapple build
By default, dapple build builds the entire contracts/ tree, and
emits the following:
- cached build objects
classes.json— a list of type definitionsjs_module.js— a JavaScript module which wrapsclasses.jsonand addsContractobjects instantiated fromweb3.jsfor each object in thedappfile
- Dappsys — a contract system framework (Nexus's "standard library")
- Feedbase — a simple paid feed app
- stringutils — string manipulation library
- RanDAOPlus - Experimental Ethereum RNG based on PoW
- Aliasing and imports
- Environments and object linking
- Ignore/add