Chapter 3: Initialize and Deploy Contract

Initialize the contract

We have obtained the contract class Tictactoe by loading the contract artifact file. When the user clicks the start button, the contract is initialized with the public keys of two players alice and bob. The public key can be obtained through the getDefaultPubKey() interface of Signer.

The following code initializes the contract.

const [alicePubkey, setAlicePubkey] = useState("");
const [bobPubkey, setBobPubkey] = useState("");

  ...

const startGame = async (amount: number) => {
  try {
    const signer = signerRef.current as PandaSigner;

    const instance = new TicTacToe(
        PubKey(toHex(alicePubkey)),
        PubKey(toHex(bobPubkey))
      );

    await instance.connect(signer);


  } catch(e) {
    console.error('deploy TicTacToe failes', e)
    alert('deploy TicTacToe failes')
  }
};

Deploy it

Each contract instance has a deploy() method:

deploy(amount?: number, options?: {
    changeAddress?: AddressOption,
    address?: AddressOption,
}): Promise<TransactionResponse>;
  • amount: how many satoshis would be locked in the contract when deployed
  • options: an optional parameter, changeAddress is customed change address, and address's corresponding private key will be used to sign the transaction.

Put it to the test

Call the deploy() method of the contract instance to deploy the contract. Before that, you need to connect a Signer or Provider first.

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