# Set Up Smart Contracts

Deploy a smart contract after meeting the prerequisites.

# Prerequisites

Wallet: Set up a wallet via Keeper Wallet or WX Network.
NOTE: Ensure saving your wallet's seed phrase to send transactions.
Tokens: Obtain WAVES tokens to cover the transaction fee for each script deployment:
- For the Mainnet network: Get 0.001 WAVES via Available Market Options.
- For the Testnet network: Get 0.001 WAVES via Faucet.
- For the Stagenet network: Get 0.001 WAVES via Faucet.

# Tutorial

Follow the steps for the relevant smart contract type:

dApp.
Smart Account.
Smart Asset.

# Deploy dApp Script

Prepare your dApp script:

// Script example:
{-# STDLIB_VERSION 3 #-}
{-# SCRIPT_TYPE ACCOUNT #-}
{-# CONTENT_TYPE DAPP #-}
let answersCount = 20

let answers =
    ['It is certain.',
    'Yes - definitely.',
    'You may rely on it.',
    'As I see it, yes.',
    'My reply is no.', 
    'My sources say no.',
    'Very doubtful.']

func getAnswer (question,previousAnswer) = {
    let hash = sha256(toBytes((question + previousAnswer)))
    let index = toInt(hash)
    answers[(index % answersCount)]
}

func getPreviousAnswer (address) = match getString(this, (address + '_a')) {
    case a: String => a
    case _ => address
}

@Callable(i)
func tellme (question) = {
    let callerAddress = toBase58String(i.caller.bytes)
    let answer = getAnswer(question, getPreviousAnswer(callerAddress))
    WriteSet([DataEntry((callerAddress + '_q'), question), DataEntry((callerAddress + '_a'), answer)])
};

Send a Set Script Transaction with:

Your seed phrase pasted into the senderPrivateKey variable.

Your dApp script pasted into the txScript variable.

NOTE: Use \n" + to properly format multi-line scripts as a string.

// Formatting example:
var txScript = "{-# STDLIB_VERSION 3 #-}\n" +
    "{-# SCRIPT_TYPE ACCOUNT #-}\n" +
    "{-# CONTENT_TYPE DAPP #-}\n" +
    "let answersCount = 20\n" +

    "let answers =\n" +
    "['It is certain.',\n" +
    "'Yes - definitely.',\n" +
    "'You may rely on it.',\n" +
    "'As I see it, yes.',\n" +
    "'My reply is no.', \n" +
    "'My sources say no.',\n" +
    "'Very doubtful.']\n" +

    "func getAnswer (question,previousAnswer) = {\n" +
        "let hash = sha256(toBytes((question + previousAnswer)))\n" +
        "let index = toInt(hash)\n" +
        "answers[(index % answersCount)]\n" +
    "}\n" +

    "func getPreviousAnswer (address) = match getString(this, (address + '_a')) {\n" +
        "case a: String => a\n" +
        "case _ => address\n" +
    "}\n" +

    "@Callable(i)\n" +
    "func tellme (question) = {\n" +
        "let callerAddress = toBase58String(i.caller.bytes)\n" +
        "let answer = getAnswer(question, getPreviousAnswer(callerAddress))\n" +
        "WriteSet([DataEntry((callerAddress + '_q'), question), DataEntry((callerAddress + '_a'), answer)])\n" +
    "}";

# Deploy Smart Account Script

Prepare your smart asset script:

// Script example:
{-# STDLIB_VERSION 6 #-}
{-# CONTENT_TYPE EXPRESSION #-}
{-# SCRIPT_TYPE ACCOUNT #-}

let cooperPubKey = base58'BVqYXrapgJP9atQccdBPAgJPwHDKkh6A8'
let BTCId = base58'8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS'
match tx {
    case o: Order =>
        sigVerify(o.bodyBytes, o.proofs[0], cooperPubKey ) && (o.assetPair.priceAsset == BTCId || o.assetPair.amountAsset == BTCId)
    case _ => sigVerify(tx.bodyBytes, tx.proofs[0], cooperPubKey )
};

Send a Set Script Transaction with:

Your seed phrase pasted into the senderPrivateKey variable.

Your smart asset script pasted into the txScript variable.

NOTE: Use \n" + to properly format multi-line scripts as a string:

// Formatting example:
var txScript = "{-# STDLIB_VERSION 6 #-}\n" +
    "{-# CONTENT_TYPE EXPRESSION #-}\n" +
    "{-# SCRIPT_TYPE ACCOUNT #-}\n" +
    "let cooperPubKey = base58'BVqYXrapgJP9atQccdBPAgJPwHDKkh6A8'\n" +
    "let BTCId = base58'8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS'\n" +
    "match tx {\n" +
        "case o: Order =>\n" +
            "sigVerify(o.bodyBytes, o.proofs[0], cooperPubKey ) && (o.assetPair.priceAsset == BTCId || o.assetPair.amountAsset == BTCId)\n" +
        "case _ => sigVerify(tx.bodyBytes, tx.proofs[0], cooperPubKey )\n" +
    "}";

# Deploy Smart Asset Script

Prepare your smart asset script:

// Script example:
{-# STDLIB_VERSION 6 #-}
{-# CONTENT_TYPE EXPRESSION #-}
{-# SCRIPT_TYPE ASSET #-}

func trueReturner () = {
    true
}
trueReturner()

Follow the steps based on your goal:

To create a new smart asset with the defined script.
To add a smart asset script to an existing asset.

# Create Smart Asset

Send an Issue Transaction with:

Your seed phrase pasted into the senderPrivateKey variable.

Your smart asset script pasted into the txScript variable.

NOTE: Use \n" + to properly format multi-line scripts as a string:

// Formatting example:
var txScript =
    "{-# STDLIB_VERSION 6 #-}\n" +
    "{-# CONTENT_TYPE EXPRESSION #-}\n" +
    "{-# SCRIPT_TYPE ASSET #-}\n" +
    "func trueReturner() = {\n" +
        "true\n" +
    "}\n" +
    "trueReturner()";

# Add Asset Script

Send a Set Asset Script Transaction with:

Your seed phrase pasted into the senderPrivateKey variable.
Your asset ID pasted into the assetId variable.

Your smart asset script pasted into the script variable.

NOTE: Use \n" + to properly format multi-line scripts as a string:

// Formatting example:
var script =
    "{-# STDLIB_VERSION 6 #-}\n" +
    "{-# CONTENT_TYPE EXPRESSION #-}\n" +
    "{-# SCRIPT_TYPE ASSET #-}\n" +
    "func trueReturner() = {\n" +
        "true\n" +
    "}\n" +
    "trueReturner()";