In order to interact with a Smart Contract in a Go application, the ABI (application binary interface) of the contract must first be generated, and then compiled so that it can be imported in said application.
Also known as
solc, follow the instructions here to install it.
This is the tool used to generate the
.go files with the contract ABI as input.
Check latest stable version and replace
PROTOC_ZIP=protoc-x.x.x-linux-x86_64.zip curl -OL https://github.com/google/protobuf/releases/download/vx.x.x/$PROTOC_ZIP sudo unzip -o $PROTOC_ZIP -d /usr/local bin/protoc sudo unzip -o $PROTOC_ZIP -d /usr/local include/* rm -f $PROTOC_ZIP
abigen by doing:
go get -u github.com/ethereum/go-ethereum cd $GOPATH/src/github.com/ethereum/go-ethereum/ make make devtools
Save the Smart Contract ABI to your local drive and keep the location at hand.
If you do not have an ABI, you can generate one from the contract replacing the
.sol file with your own smart contract filename:
solc --abi Contract.sol -o build
For this example, the resulting file will be
To convert the ABI into a Go file, execute the following command:
abigen --abi=./build/Contract.abi --pkg=mypackage --out=Contract.go
Replace the contract and package names with your own.
In this fashion, the RNS Resolver was compiled by doing:
abigen --abi=MultiChainResolverABI.json --pkg=multichainresolver --out=multi_chain_resolver.go
and then imported to and used in the
Guide based on Smart Contract Compilation & ABI by Miguel Mota.