SponsorFee

⚠️ The SponsorFee structure is added in Standard library version 4 which becomes available since node version 1.2.0, after activation of feature #15 “Ride V4, VRF, Protobuf, Failed transactions”. Versions 1.2.x are currently available on Stagenet only.

SponsorFee is a structure that sets up sponsorship. For information about sponsorship, see the Spensored Fee article. The sponsorship setup is performed only if the structure is included in the resulting expression of the callable function. See details in the Callable Function article.

Constructor

SponsorFee(assetId: ByteVector, minSponsoredAssetFee: Int|Unit)

Fields

#	Name	Data type	Description
1	assetId	ByteVector	Asset ID. Any asset (except smart assets) issued by the dApp account is acceptable, including an asset issued by the same script invocation
2	minSponsoredAssetFee	Int|Unit	Amount of sponsored asset that is equivalent to 0.001 WAVES, specified in the minimum fraction (“cent”) of the sponsored asset. unit — disable the sponsorship

Example

{-# STDLIB_VERSION 4 #-}
{-# CONTENT_TYPE DAPP #-}
{-# SCRIPT_TYPE ACCOUNT #-}
  
@Callable(i)
func issueAndSponsor() = {
  let issue = Issue("Spring", "", 100000, 2, true, unit, 0)
  let id = calculateAssetId(issue)
  [
    issue,
    SponsorFee(id, 300)
  ]
}

The issueAndSponsor callable function issues an asset and enables sponsorship. The minimum fee in sponsored asset is 3 Spring.