saltbo / eos-go

EOS.IO Go API library

EOS.IO API library for Go

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This library provides simple access to data structures (binary packing and JSON interface) and API calls to an EOS.IO RPC server, running remotely or locally. It provides wallet functionalities (KeyBag), or can sign transaction through the keosd wallet. It also knows about the P2P protocol on port 9876.

As of before the June launch, this library is pretty much in flux. Don't expect stability, as we're moving alongside the main eosio codebase, which changes very fast.

This library is the basis for the eos-bios launch orchestrator tool at https://github.com/eoscanada/eos-bios

Basic usage

api := eos.New("http://testnet1.eos.io")

infoResp, _ := api.GetInfo()
accountResp, _ := api.GetAccount("initn")
fmt.Println("Permission for initn:", accountResp.Permissions[0].RequiredAuth.Keys)

eosio.system and eosio.token contract Actions are respectively in:

• https://github.com/eoscanada/eos-go/tree/master/system (godocs)
• https://github.com/eoscanada/eos-go/tree/master/token (godocs)

Binaries

There is some binaries in main packages under cmd/, mainly around P2P communication.

Example

Reference

• API
  • Get Chain Information
  • Transfer Token
• Decoding/Encoding
  • Decode Table Row

Running

The easiest way to see the actual output for a given example is to add a line // Output: any at the very end of the test, looks like this for ExampleAPI_GetInfo file (examples_api_get_info.go):

    if err != nil {
        panic(fmt.Errorf("json marshal response: %s", err))
    }

    fmt.Println(string(bytes))
    // Output: any
}

This tells go test that it can execute this test correctly. Then, simply run only this example:

go test -run ExampleAPI_GetInfo

Replacing ExampleAPI_GetInfo with the actual example name you want to try out where line // Output: any was added.

This will run the example and compares the standard output with the any which will fail. But it's ok an expected, so you can see the actual output printed to your terminal.

Note Some examples will not succeed out of the box because it requires some configuration. A good example being the transfer operation which requires having the authorizations and balance necessary to perform the transaction. It's quite possible to run them through a development environment however.

Environment Variables

All examples uses by default the https://mainnet.eos.dfuse.io API endpoint for all HTTP communication and peering.mainnet.eoscanada.com for P2P communication. They can respectively be overridden by specifying environment variable EOS_GO_API_URL and EOS_GO_P2P_ENDPOINT respectively.

Contributing

Any contributions are welcome, use your standard GitHub-fu to pitch in and improve.

License

MIT