Loom SDK

Loom application specific side chain software development kit.

Documentation

Loom SDK Documentation Site

Environment Setup

Requirements

• Go 1.9+
• Dep

On Mac

brew install dep

and on Linux

curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh

To build loomchain with cleveldb

On Mac

brew install leveldb

and on Linux

apt-get install libleveldb-dev libleveldb1v5

Installing

Install SDK

Building

Make sure GOPATH is defined and run

LOOM_SRC=$GOPATH/src/github.com/loomnetwork/loomchain
# clone into gopath
git clone git@github.com:loomnetwork/loomchain.git $LOOM_SRC
# install deps
cd $LOOM_SRC
make deps
make

Running

# init the blockchain with builtin contracts
./loom init
# run the node
./loom run

Generate keys

Use the genkey command. It will create two files with the given names.

./loom genkey -a publicKeyFilename -k privateKeyFilename

Ethereum smart contracts

Deploy smart contract with deploy

./loom deploy -a pubkeyFile -k prikeyFile -b contractBytecode.bin
New contract deployed with address:  default:0xB448D7db27192d54FeBdA458B81e7383F8641c8A
Runtime bytecode:  [96 96 96 64 82 96 .... ]

Make a call to an already deployed contract with call

./loom call  -a pubkeyFile -k prikeyFile -i inputDataFile -c 0xB448D7db27192d54FeBdA458B81e7383F8641c8A
Call response:  [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 219]

Details of encoding contract input data can be found in the Solidity ABI documentation. You can use static-call similarly to run a read only method.

Updating Protobuf Messages

# build the Go plugin for protoc
make proto

Read https://developers.google.com/protocol-buffers/docs/reference/go-generated to understand how to use the generated protobuf messages.