Testnet Access and Javascript SDK examples

⚙️ Flow SDKs Flow Go SDK
#1

Below was the original question

Hello, I found this on the onflow javascript sdk example. Is this up to date? I read on the onflow website that in order to deploy to testnet I needed to create an account on Faucet.

When I use Blocto it doesn’t seem to connect as well

Also, the example listed here https://docs.onflow.org/guides/dapp-deployment/testnet-deployment/ when using Testnet is with the Go SDK. Is there a Javascript example as well? Also, is there a built out example of how to deploy contracts in Javascript SDK? Thanks again

#2

@Tim @Mackenzie probably can share additional info on new Testnet access documentation
@JeffreyDoyle or @qvvg might be able to help with Javascript SDK examples to deploy contracts to Testnet

#3

Thanks unlocked. All of my questions still stand, but my biggest concern is that last part about deploying contracts in Javascript now. When I was a part of the bootcamp during the summer it was done the same way a transaction was sent. Now it looks different because you can deploy multiple contracts to 1 account and I keep getting an error message about “setCode.” I tried looking here https://docs.onflow.org/cadence/language/contracts/#deploying-updating-and-removing-contracts but it’s too confusing for me because I can’t find a Javascript example.

My end goal is really just to deploy a contract that mints test NFTs on the testnet, so whatever would help get me there is great hahahah. Thanks again :slight_smile:

#4

Deploying contracts from JavaScript is done the same way you did it in the bootcamp, but with a small change to the Cadence code you use in the transaction itself.
Previously, you would have used a transaction like this:

const CODE = 
`transaction(code: String) {
    prepare(acct: AuthAccount) {
        acct.setCode(code.decodeHex())
    }
}`

Now that accounts have multi-contract support, your transaction should look something like this:

const CODE = 
`transaction(code: String) {
    prepare(acct: AuthAccount) {
       acct.contracts.add(
           name: "Test",
           code: code.decodeHex(),
           message: "I'm a new contract in an existing account"
        )
    }
}`

Hi Jacob, I think the error you’re getting about setCode is happening because @onflow/fcl's ‘stored interactions’ have not been updated with this new transaction code. You can still send the transaction without using a ‘stored interaction’ in the meantime. Multi-contract support in Cadence is a recent addition, and we’re working on bringing all the tooling up-to-date.

It’s true that the documentation is lacking good JavaScript examples, at the moment. We’re also working on making a guide for JavaScript developers to follow, using the latest Cadence features!

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#5

This repo might be of use, its up to date as of yesterday. : https://github.com/orodio/flow-node-deploy-contract-example

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#6

Thank you! That helped me very much in deploying a Contract! Now I am trying to deploy a contract to an account using the Testnet and I can’t seem to get it to work. This link https://docs.onflow.org/guides/dapp-deployment/testnet-deployment/#getting-started-on-testnet suggests using this command using the Flow CLI:

flow accounts create \
  --host access.devnet.nodes.onflow.org:9000 \
  --signer testnet \
  --code MyContract.cdc

However it returns an error everytime that the code flag doesn’t exist. I tried updating the CLI and everything. I’m not quite sure what to make of this. Thanks for your help again.

#7

Hi Jacob!

We’ve just recently updated the CLI to support multiple contracts per account.

Please update to CLI v0.12 (by reinstalling the CLI, i.e. running the installation command you used again).

The --code flag has been replaced by the --contract flag, so if you have a contract contract MyContract { ... } in a file MyContract.cdc, then:

--contract MyContract:MyContract.cdc

should work.

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