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See an introduction including the list of supported networks on the fee sponsors feature page, or watch the video tutorial for dashboard users.

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Flow overview

1

Create a fee sponsor

Designate an existing wallet as a fee sponsor.POST/fee-sponsors Create Fee Sponsor
2

Fund the sponsor wallet

Ensure the fee sponsor wallet has sufficient native tokens to cover gas fees.
3

Use in transfers

Specify feeSponsorId when creating a transfer. The sponsor and sponsoree wallets must be on the same network.POST/wallets/{walletId}/transfers Transfer Asset
If the fee sponsor wallet has a policy that blocks signing (e.g., Block action on Wallets:Sign), sponsored transfers will fail.
High-volume tip: If you’re processing a high volume of transactions for a given wallet, use a single fee sponsor for that wallet. This allows Dfns to better optimize transaction scheduling and improve throughput.

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Fee Sponsor object

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id
string
required

Fee Sponsor id.

Required string length: 1 - 64
Pattern: ^fs-[a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{14,16}$
Example:

"fs-5vqdl-gliqk-b4rfukqauov1sp7j"

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walletId
string
required

Id of the wallet that is used to sponsor the fee for other wallets

Required string length: 1 - 64
Pattern: ^wa-[a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{14,16}$
Example:

"wa-5pfuu-9euek-h0odgb6snva8ph3k"

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network
enum<string>
required

Network used for the wallet.

Available options:
Algorand,
AlgorandTestnet,
Aptos,
AptosTestnet,
ArbitrumOne,
ArbitrumSepolia,
ArcTestnet,
AvalancheC,
AvalancheCFuji,
BabylonGenesis,
BabylonTestnet5,
Base,
BaseSepolia,
Berachain,
BerachainBepolia,
Bitcoin,
BitcoinSignet,
BitcoinTestnet3,
BitcoinCash,
Bob,
BobSepolia,
Bsc,
BscTestnet,
Canton,
CantonTestnet,
Cardano,
CardanoPreprod,
Concordium,
ConcordiumTestnet,
Celo,
CeloAlfajores,
Codex,
CodexSepolia,
CosmosHub4,
CosmosIcsTestnet,
Dogecoin,
DogecoinTestnet,
Ethereum,
EthereumClassic,
EthereumClassicMordor,
EthereumSepolia,
EthereumHolesky,
EthereumHoodi,
FantomOpera,
FantomTestnet,
FlareC,
FlareCCoston2,
FlowEvm,
FlowEvmTestnet,
Hedera,
HederaTestnet,
Ink,
InkSepolia,
InternetComputer,
Ion,
IonTestnet,
Iota,
IotaTestnet,
Kaspa,
Kusama,
KusamaAssetHub,
Litecoin,
LitecoinTestnet,
Near,
NearTestnet,
Optimism,
OptimismSepolia,
Origyn,
Plasma,
PlasmaTestnet,
Plume,
PlumeSepolia,
Paseo,
PaseoAssetHub,
Polkadot,
PolkadotAssetHub,
Polygon,
PolygonAmoy,
Polymesh,
PolymeshTestnet,
Race,
RaceSepolia,
SeiAtlantic2,
SeiPacific1,
Solana,
SolanaDevnet,
Starknet,
StarknetSepolia,
Stellar,
StellarTestnet,
Sui,
SuiTestnet,
Tezos,
TezosGhostnet,
Tempo,
TempoModerato,
Tsc,
TscTestnet1,
Ton,
TonTestnet,
Tron,
TronNile,
Westend,
WestendAssetHub,
XrpLedger,
XrpLedgerTestnet
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status
enum<string>
required

Fee sponsor status.

Available options:
Active,
Deactivated,
Archived
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dateCreated
string<date-time>
required

ISO 8601 date (must be UTC). When the Fee Sponsor was created.

Example:

"2023-04-14T20:41:28.715Z"

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name
string

Nickname for the Fee Sponsor. This is displayed on the transfer modal in the dashboard.

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allowEndUser
boolean

Defines whether EndUsers and their delegated wallets can use this Fee Sponsor.

Last modified on February 16, 2026