flowchart LR
    %%{init: {'flowchart' : {'curve' : 'linear'}}}%%
    subgraph BData[Blockchain Database]
        direction LR
        BN[Block N] -.-> BN1[Block N+1]
    end

    subgraph SData[State Database]
        direction LR
        SN[State N] -.-> SN1[State N+1] -.-> SN2[State N+2]
    end

    BN --> STFN[STF]
    SN --> STFN[STF]
    STFN[STF] --> SN1

    BN1 --> STFN1[STF]
    SN1 --> STFN1[STF]
    STFN1[STF] --> SN2