# soll demo

## Connect MetaMask to ewasm testnet


## Environment

$ docker pull secondstate/soll:demo
$ docker run -it --rm secondstate/soll:demo

## Prepare Contract

# vim contract.sol

contract Token {
  uint256 totalSupply;
  mapping(address => uint256) balances;

  event Transfer(address indexed _from, address indexed _to, uint256 _value);

  constructor() {
    totalSupply = 100000000;
    balances[msg.sender] = totalSupply;
  }

  function balanceOf(address account) view public returns (uint256) {
    return balances[account];
  }

  function transfer(address to, uint256 amount) public returns (bool) {
    balances[msg.sender] = balances[msg.sender] - amount;
    balances[to] = balances[to] + amount;
    emit Transfer(msg.sender, to, amount);
    return true;
  }
}

## Compile Contract

- Get ABI

# soll -action=EmitABI contract.sol
[{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"}]

- Get data

# soll contract.sol > contract.ll
# soll/utils/compile contract.ll

# ls -l contract*.wasm
-rwxr-xr-x 1 root root 1610 Oct  1 08:53 contract.deploy.wasm
-rwxr-xr-x 1 root root 1483 Oct  1 08:53 contract.wasm

- `*.deploy.wasm` is just like `--bin` and `*.wasm` is `--bin-runtime` in EVM world.
- Get hex data about `contract.deploy.wasm`

# xxd -p contract.deploy.wasm | tr -d $'\n'
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

## Deploy Contract

- Using [ewasm testnet explorer](http://ewasm.ethereum.org/explorer/tx/submit)
- Paste contract data (with prefix `0x`)
- Leave destination and value blank (for contract deployment)


- Accept at MetaMask


- After seconds, the tx will show up at [ewasm testnet explorer][explorer]


- View tx detail at [ewasm testnet explorer][explorer]
- http://ewasm.ethereum.org/explorer/tx/0xeb63374f3ee569f04455a59817f13b3bcc05d127899a0707362ec5a84504062f


- View contract detail at [ewasm testnet explorer][explorer]
- http://ewasm.ethereum.org/explorer/account/0xe48Db28C3F4daA7230B774dC1E7954Fd901de627


## Interact with Contract

- Use [BUIDL](https://buidl.secondstate.io) to interact with contract
- Connect [BUIDL](https://buidl.secondstate.io) to MetaMask provider


- Compile contract & assign contract address


- `balanceOf`


- `transfer`
- Transfer 990 token from MetaMask account to account `0x0`


- Check `transfer` tx at [ewasm testnet explorer][explorer]
- http://ewasm.ethereum.org/explorer/tx/0x862f6227c00e9964e283c5eac43998514147e3f8a8654f3ff062b902c51a8890


- `balanceOf` after `transfer`


[explorer]: http://ewasm.ethereum.org/explorer/