is there any requirements to the expression matrix?

I'm very interested in finding such package for constrcuting ceRNA network.
I have read the paper for SPONGE theory where conduct construction of a pan-cancer ceRNA network with the data from UCSC, and expression matrix is performed a log2 transformation, as I known, the unit of the data in UCSC is log2(count+1), so I don't know whether there is some requirements to the expression matrix? Can I use normalized counts which is transformed via count(matrix, normalized = T)? or Can I use vst function from DESeq2 package to transform expression matrix?

No project file, test, or entry point is named. Start by reading the SPONGE input documentation and checking how its expression-matrix interface handles UCSC log2(count+1), normalized counts, and DESeq2 vst inputs. Done means documenting the accepted transformations and any relevant constraints.

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