**[@substrate/txwrapper](../README.md)** > [Globals](../globals.md) / ["src/methods/staking/bondExtra"](../modules/_src_methods_staking_bondextra_.md) / StakingBondExtraArgs # Interface: StakingBondExtraArgs ## Hierarchy * {} ↳ **StakingBondExtraArgs** ## Index ### Properties * [maxAdditional](_src_methods_staking_bondextra_.stakingbondextraargs.md#maxadditional) ## Properties ### maxAdditional • **maxAdditional**: number \| string *Defined in [src/methods/staking/bondExtra.ts:13](https://github.com/paritytech/txwrapper/blob/f8d9b6f/src/methods/staking/bondExtra.ts#L13)* The maximum amount to bond.