DigestSet contains a set of digests. It is represented as a map from algorithm name to lowercase hex-encoded value.
type DigestSet map[string]string
ProvenanceBuilder idenfifies the entity that executed the build steps.
type ProvenanceBuilder struct {
ID string `json:"id"`
}
ProvenanceMaterial defines the materials used to build an artifact.
type ProvenanceMaterial struct {
URI string `json:"uri,omitempty"`
Digest DigestSet `json:"digest,omitempty"`
}