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input: add constructor for csv-locked inputs

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Joost Jager 2019-10-29 17:17:45 +01:00
parent 55a32c951a
commit 7e472c9e8c
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GPG Key ID: A61B9D4C393C59C7
1 changed files with 29 additions and 18 deletions
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39
input/input.go
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@ -48,6 +48,7 @@ type inputKit struct {
witnessType WitnessType witnessType WitnessType
signDesc SignDescriptor signDesc SignDescriptor
heightHint uint32 heightHint uint32
blockToMaturity uint32
} }
// OutPoint returns the breached output's identifier that is to be included as // OutPoint returns the breached output's identifier that is to be included as
@ -74,6 +75,13 @@ func (i *inputKit) HeightHint() uint32 {
return i.heightHint return i.heightHint
} }
// BlocksToMaturity returns the relative timelock, as a number of blocks, that
// must be built on top of the confirmation height before the output can be
// spent. For non-CSV locked inputs this is always zero.
func (i *inputKit) BlocksToMaturity() uint32 {
return i.blockToMaturity
}
// BaseInput contains all the information needed to sweep a basic output // BaseInput contains all the information needed to sweep a basic output
// (CSV/CLTV/no time lock) // (CSV/CLTV/no time lock)
type BaseInput struct { type BaseInput struct {
@ -107,6 +115,23 @@ func NewBaseInput(outpoint *wire.OutPoint, witnessType WitnessType,
return &input return &input
} }
// NewCsvInput assembles a new csv-locked input that can be used to
// construct a sweep transaction.
func NewCsvInput(outpoint *wire.OutPoint, witnessType WitnessType,
signDescriptor *SignDescriptor, heightHint uint32,
blockToMaturity uint32) *BaseInput {
return &BaseInput{
inputKit{
outpoint: *outpoint,
witnessType: witnessType,
signDesc: *signDescriptor,
heightHint: heightHint,
blockToMaturity: blockToMaturity,
},
}
}
// CraftInputScript returns a valid set of input scripts allowing this output // CraftInputScript returns a valid set of input scripts allowing this output
// to be spent. The returned input scripts should target the input at location // to be spent. The returned input scripts should target the input at location
// txIndex within the passed transaction. The input scripts generated by this // txIndex within the passed transaction. The input scripts generated by this
@ -119,13 +144,6 @@ func (bi *BaseInput) CraftInputScript(signer Signer, txn *wire.MsgTx,
return witnessFunc(txn, hashCache, txinIdx) return witnessFunc(txn, hashCache, txinIdx)
} }
// BlocksToMaturity returns the relative timelock, as a number of blocks, that
// must be built on top of the confirmation height before the output can be
// spent. For non-CSV locked inputs this is always zero.
func (bi *BaseInput) BlocksToMaturity() uint32 {
return 0
}
// HtlcSucceedInput constitutes a sweep input that needs a pre-image. The input // HtlcSucceedInput constitutes a sweep input that needs a pre-image. The input
// is expected to reside on the commitment tx of the remote party and should // is expected to reside on the commitment tx of the remote party and should
// not be a second level tx output. // not be a second level tx output.
@ -175,13 +193,6 @@ func (h *HtlcSucceedInput) CraftInputScript(signer Signer, txn *wire.MsgTx,
}, nil }, nil
} }
// BlocksToMaturity returns the relative timelock, as a number of blocks, that
// must be built on top of the confirmation height before the output can be
// spent.
func (h *HtlcSucceedInput) BlocksToMaturity() uint32 {
return 0
}
// Compile-time constraints to ensure each input struct implement the Input // Compile-time constraints to ensure each input struct implement the Input
// interface. // interface.
var _ Input = (*BaseInput)(nil) var _ Input = (*BaseInput)(nil)