cosmgo

The library written in Golang makes it easier for developers to interact with CosmWasm Smart Contracts

I. Install library

go get github.com/LeTrongDat/cosmgo

II. Instructions

1. Initialize a connection

Here we use gRPC as our main protocol to interact with wasm module

grpcConn, err := grpc.Dial(
		GRPC_Server_Address, // Or your gRPC server address.
		grpc.WithInsecure(), // The Cosmos SDK doesn't support any transport security mechanism.
	)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
	defer grpcConn.Close()

2. Initialize a context

clientCtx := web3.NewContext()
clientCtx = clientCtx.WithChainID(Chain_ID).
  WithGRPCClient(grpcConn).
  WithAPI(API).
  WithBech32Prefix(Bech32_Prefix)

3. Initialize an account

account := web3.NewAccount(clientCtx, Private_Key, From_Address)

4. Initialize a contract and ContractMsg

contract := web3.NewContract()
msgExecuteContract := web3.NewMsgExecuteContract(
  account.Address,
  Contract_Address,
  []byte(Msg),
  util.NewFeeAmount("stake", 10000),
  util.NewGasLimit(200000),
)

5. SendTx

rsp, err := contract.SendTx(clientCtx, msgExecuteContract)
if err != nil {
  fmt.Println("error", err)
  os.Exit(1)
}
fmt.Println("response", rsp.TxResponse)

III. Constants Example

const (
	// chain config
	API                 string = "http://10.1.0.44:1317"
	GRPC_Server_Address string = "10.1.0.44:9090"
	Chain_ID            string = "baseblockchain"
	Bech32_Prefix       string = "sosc"

	// contract config
	Contract_Address string = "sosc1nc5tatafv6eyq7llkr2gv50ff9e22mnf70qgjlv737ktmt4eswrq43khmt"
	From_Address     string = "sosc154qv5c37vq4nd7m4p6dzvvar6zthch25tpjgmv"
	Private_Key      string = "ea2e25468b256bad1c391a23c24f03e07627a52fcffafbd78c2e07ccd0df2bc2"
	Msg              string = `{"register":{"name":"fred"}}`
)