Earn

Overview

Earn lets a user’s wallet deposit into a yield vault, track what the position is worth, claim reward campaigns, and withdraw. sdk.earn wraps the Earn API and signs and broadcasts the transactions it returns. For how vaults, shares, and yield work, see the Earn overview. Every Earn action returns an unsigned payload. You sign and broadcast it with execute, which sends the ERC-20 approval first and waits for it to confirm whenever the payload carries one.

Prerequisites

Dynamic SDK initialized (see Quickstart)
User authenticated (see Authentication)
An EVM wallet (see Wallet Creation). EVM is the only chain with live vaults today.
Earn enabled for your environment in the Dynamic Console. Until it is, every call throws an EarnError with statusCode 403.

Earn is available on the SDK instance as sdk.earn:

val earn = sdk.earn

Browse vaults

getVaults returns the vaults your environment can access. getVaultDetails adds the on-chain fields you need to display and transact against one, including assetDecimals.

val vaults = sdk.earn.getVaults()

vaults.forEach { vault ->
    println("${vault.assetSymbol} by ${vault.curator} on chain ${vault.chainId}")
    println("Net APY: ${vault.netApy}, TVL: ${vault.tvlUsd}")
}

val vault = sdk.earn.getVaultDetails(vaults.first().vaultId)

netApy and tvlUsd come from live market data on a best-effort basis, so both are null when that data is unavailable.

Read a position

A position holds shares and assets, both in raw token units. Show assets, because it grows as yield accrues. Depending on the vault’s provider, shares either stays flat or always equals assets, so it is not meaningful to show a user.

val position = sdk.earn.getVaultPosition(
    vaultId = vault.vaultId,
    ownerAddress = wallet.address
)

val assets = position.assets.toBigInteger()
val balance = assets.toBigDecimal(vault.assetDecimals)

println("Balance: $balance ${vault.assetSymbol}")

Read rewards

Rewards are a separate bonus some vaults pay in another token. They sit unclaimed until you claim them, unlike base yield, which shows up as assets growing.

val rewards = sdk.earn.getVaultRewards(
    vaultId = vault.vaultId,
    ownerAddress = wallet.address
)

rewards.forEach { reward ->
    println("${reward.accrued} raw units of ${reward.tokenSymbol}")
}

The list is empty when the wallet has accrued nothing in the vault. Rewards are supported only for vaults from some providers. For a vault from any other provider, the API rejects the rewards and claim requests with an HTTP 400 error, which surfaces as an EarnError. See Provider support.

Deposit

deposit builds the payload, execute sends it. amount is human-readable, so "12.5" deposits 12.5 USDC.

val deposit = sdk.earn.deposit(
    vaultId = vault.vaultId,
    amount = "12.5",
    ownerAddress = wallet.address
)

val transactionHash = sdk.earn.execute(
    payload = deposit.signingPayload,
    wallet = wallet,
    onStepChange = { step ->
        when (step) {
            EarnExecutionStep.APPROVAL -> println("Approving the vault to spend the deposit")
            EarnExecutionStep.TRANSACTION -> println("Sending the vault transaction")
        }
    }
)

execute returns the vault transaction hash. When the payload carries an evmApproval, it sends that approval first and waits for its receipt, so onStepChange reports APPROVAL before TRANSACTION.

Withdraw

Withdrawals redeem shares the wallet already holds, so they never need an approval.

val withdrawal = sdk.earn.withdraw(
    vaultId = vault.vaultId,
    amount = "12.5",
    ownerAddress = wallet.address
)

val transactionHash = sdk.earn.execute(
    payload = withdrawal.signingPayload,
    wallet = wallet
)

Claim rewards

try {
    val claim = sdk.earn.claim(
        vaultId = vault.vaultId,
        ownerAddress = wallet.address
    )

    val transactionHash = sdk.earn.execute(
        payload = claim.signingPayload,
        wallet = wallet
    )
} catch (e: EarnError) {
    if (e.nothingToClaim) {
        println("Nothing to claim in this vault")
    }
}

Gas sponsorship

The sponsored parameter on execute picks how an EVM payload’s transactions pay gas:

true requires gas sponsorship and throws EarnSponsorError when it is unavailable.
false always pays the fee from the wallet.
null (the default) sponsors when the environment enables it and falls back to a wallet-paid transaction otherwise.

val transactionHash = sdk.earn.execute(
    payload = deposit.signingPayload,
    wallet = wallet,
    sponsored = true
)

A sponsored EVM execution batches the ERC-20 approval and the vault call into one gasless transaction. On Solana, sponsorship works through SVM Gas Sponsorship, and the sponsorshipMode parameter on execute overrides the project’s sponsorship setting per action. See EVM Gas Sponsorship for how to enable it.

Amount units

Amounts cross the wire as strings in two different units:

The amount you pass to deposit and withdraw is human-readable: "12.5" means 12.5 USDC.
EarnVaultPosition, EarnVaultReward, and the amounts inside a signing payload are raw token units. They can exceed an Int, so parse them with BigInteger.

Mixing the two units up silently transacts the wrong value. Human-readable amounts also need a leading zero: "0.01" works, ".01" is rejected by the API.

Handle errors

Every failed Earn call throws an EarnError carrying the HTTP statusCode:

Condition	What it means
`statusCode` 403	Earn is not enabled for your environment
`nothingToClaim` (422 on claim)	The wallet has no claimable rewards in the vault
`statusCode` 400	The vault’s provider does not support the request, such as rewards
Other status codes	The API rejected the request, for example an invalid amount or address

try {
    val vaults = sdk.earn.getVaults()
} catch (e: EarnError) {
    println("Earn failed (${e.statusCode}): ${e.message}")
}

execute also throws an EarnError when the wallet’s chain does not match the payload, when the payload carries no transaction, or when the approval reverts or is not confirmed in time.

Next steps

ERC-20 Token Transfers to move the vault asset in and out of the wallet
Earn overview for vault, share, and yield concepts

Learn

Implement

Overview

Prerequisites

Browse vaults

Read a position

Read rewards

Deposit

Withdraw

Claim rewards

Gas sponsorship

Amount units

Handle errors

Next steps

​Overview

​Prerequisites

​Browse vaults

​Read a position

​Read rewards

​Deposit

​Withdraw

​Claim rewards

​Gas sponsorship

​Amount units

​Handle errors

​Next steps

Overview

Prerequisites

Browse vaults

Read a position

Read rewards

Deposit

Withdraw

Claim rewards

Gas sponsorship

Amount units

Handle errors

Next steps