try {
    val result = withContext(Dispatchers.IO) {
        sdk.shield(
            tokenAddress = "0x...token-address",
            amount = "1000000000000000000" // 1 token (18 decimals)
        )
    }
    println("Transaction hash: ${result.txHash}")
    println("Commitment: ${result.commitment}")
} catch (e: SDKError) {
    println("Deposit failed: $e")
}

data class ShieldResult(
    val txHash: String,      // Main deposit transaction hash
    val commitment: String,  // Note commitment
    val fee: String          // Fee paid (in wei)
)

val ethAddress = "0x0000000000000000000000000000000000000000"

val result = withContext(Dispatchers.IO) {
    sdk.shield(
        tokenAddress = ethAddress,
        amount = "1000000000000000000" // 1 ETH
    )
}
println("Deposit tx: ${result.txHash}")

// Parse human-readable amount to wei string
val weiAmount = sdk.parseAmount("1.5", decimals = 18u)
// Returns: "1500000000000000000"

// Format wei string to human-readable
val formatted = sdk.formatAmount("1500000000000000000", decimals = 18u)
// Returns: "1.5"

// For USDC (6 decimals)
val usdcWei = sdk.parseAmount("100.0", decimals = 6u)
// Returns: "100000000"

try {
    val result = withContext(Dispatchers.IO) {
        sdk.shield(tokenAddress = tokenAddress, amount = amount)
    }
} catch (e: SDKError) {
    when (e) {
        is SDKError.InsufficientBalance ->
            println("Not enough tokens in wallet")
        is SDKError.InvalidAmount ->
            println("Invalid amount format")
        is SDKError.WalletError ->
            println("Wallet error: ${e.message}")
        is SDKError.SignatureRejected ->
            println("User rejected the transaction")
        is SDKError.NetworkError ->
            println("Network error: ${e.message}")
        else ->
            println("Deposit error: $e")
    }
}

fun validateDepositAmount(amount: String, walletBalance: String) {
    val amountValue = amount.toBigIntegerOrNull()
        ?: throw SDKError.InvalidAmount
    require(amountValue > BigInteger.ZERO) { "Amount must be positive" }

    val balanceValue = walletBalance.toBigIntegerOrNull()
        ?: throw SDKError.InsufficientBalance("Invalid wallet balance")
    require(amountValue <= balanceValue) { "Insufficient wallet balance" }
}

val result = withContext(Dispatchers.IO) {
    sdk.shield(tokenAddress = tokenAddress, amount = amount)
}

// Refresh balance to reflect the deposit
val updatedBalance = withContext(Dispatchers.IO) {
    sdk.getBalance(tokenAddress = tokenAddress)
}
println("New shielded balance: ${updatedBalance.shieldedBalance}")

// In a ViewModel
viewModelScope.launch {
    val result = withContext(Dispatchers.IO) {
        sdk.shield(tokenAddress = token, amount = amount)
    }
    // Update UI on main thread
    _depositState.value = DepositState.Success(result.txHash)
}

// 1. Build the calldata (nothing submitted)
val prepared = withContext(Dispatchers.IO) {
    sdk.prepareShield(
        tokenAddress = "0x...",
        amount = "1000000000000000000",
        recipient = null  // pass a privacy address to shield to someone else
    )
}

// prepared.wrap / prepared.approve / prepared.shield are Call(to, value, data)
// values — relay them in order (wrap?, approve?, shield).
val calls = listOfNotNull(prepared.wrap, prepared.approve, prepared.shield)
val receipt = myRelayer.submit(calls)

// 2. Finalize from the mined receipt to recover the request id
val result = finalizeShield(
    receipt = receipt,
    shieldContract = prepared.finalize.shieldContract,
    commitment = prepared.commitment
)
println("Request ID: ${result.requestId}")

val prepared = buildShieldPayload(
    tokenAddress = "0x...",
    amount = "1000000000000000000",
    recipient = userPrivacyAddress,
    tokenId = tokenId,                      // from the token catalog
    shieldContractAddress = shieldContractAddress,
    wethContractAddress = null,             // required only for native ETH
    teePublicKey = teePublicKey,
    minShieldAmount = minShieldAmount,      // optional: reject below the per-token minimum
    emitApprove = true
)