HelloEOS is a modified project building flow of deploying an EOS smart contract to Jungle Testnet base on the official tutorial on https://developers.eos.io/eosio-home/docs.

I've followed the official tutorial but end up encountering some problems, which is why this project flow is written.

• Generate the public key and private key pair for your testnet account.
• example website: https://nadejde.github.io/eos-token-sale/
• Remember the public key and private key you just generated.

Since we are generating the keys only for testnet, the security issue is not that serious when you generate the keys on web.

• Get the desktop verison: https://get-scatter.com/
• Or, add it to Google: https://chrome.google.com/webstore/detail/scatter/ammjpmhgckkpcamddpolhchgomcojkle?hl=zh-TW
• Create your wallet and remember your password & mnemonic carefully.
• Import the private key in Step 1 to your wallet.

• https://monitor.jungletestnet.io/#home

• Create Account

  • Enter account name and the public key generated in Step 1.
  • You might get error if the account name was already used, just think of another one.

• Faucet

  • Get some free EOS for your testnet account (100 EOS at a time).

• Block Explorer

  • Login by Scatter.
  • View account -> Wallet: You can buy some CPU/Net/RAM with the EOS you just got from the faucet.

Version:

eosio: 1.7.0, eosio.cdt: 1.6.0

• Install eosio

   brew tap eosio/eosio
   brew install eosio
  

• Install eosio.cdt

   brew tap eosio/eosio.cdt
   brew install eosio.cdt
  

• Setup development wallet

  • First, go to Jungle Testnet website and click "API endpoints", copy any one of it (ex: http://jungle2.cryptolions.io:80).

  • Check your account

     cleos --url http://jungle2.cryptolions.io:80 get account [account_name]
    

    • Suppose my account name is "ktgincottest", cleos --url http://jungle2.cryptolions.io:80 get account ktgincottest.
    • You should see some account info in console.

  • Create default wallet

     cleos --url http://jungle2.cryptolions.io:80 wallet create --to-console
    

    • You should see a password for this wallet. Remember it.

  • Open and unlock the wallet

     cleos --url http://jungle2.cryptolions.io:80 wallet open
     cleos --url http://jungle2.cryptolions.io:80 wallet unlock
     cleos --url http://jungle2.cryptolions.io:80 wallet list
    

    • You should see something like Wallets: ["default *"]

  • Import private key

     cleos --url http://jungle2.cryptolions.io:80 wallet import
    

    • Paste the private key generated in Step 1.

• Clone this project or download the hello.cpp in this repository.

• Compile hello.cpp

   eosio-cpp -o hello.wasm hello.cpp --abigen
  

  • If some warning like "empty ricardian clause file" or "action does not have a ricardian contract" appears, just ignore it.

• Set contract

   cleos --url http://jungle2.cryptolions.io:80 set contract [account_name] . -p [account_name]@active
  

  • Suppose my account name is "ktgincottest", cleos --url http://jungle2.cryptolions.io:80 set contract ktgincottest . -p ktgincottest@active
  • If you see some error such as "Error 3080001: Account using more than allotted RAM usage", go buy some RAM on the Jungle Testnet for your account.

• Block Explorer on Jungle Testnet

  • Login and view your account.
  • You should see a new button "</>Contract" appear beside "Account", and the function "hi" would appear below.
  • You can click "hi" to push a new transaction, then scatter should jump out and ask for permission.
  • Done! You've set up your first EOS smart contract!