Drop extra bitcoin blocks
There were the same number of bitcoin and ethereum blocks, but the
diagram only references one bitcoin block, so let's just display three.
\node[decision,on chain=bitcoin,join=by <-] (bitcoin block 1) {\hspace*{1cm}};
\node[decision,on chain=bitcoin,join=by <-] (bitcoin block 2) {\hspace*{1cm}};
\node[decision,on chain=bitcoin,join=by <-] (bitcoin block 3) {\hspace*{1cm}};
- \node[decision,on chain=bitcoin,join=by <-] (bitcoin block 4) {\hspace*{1cm}};
- \node[decision,on chain=bitcoin,join=by <-] (bitcoin block 5) {\hspace*{1cm}};
- \node[on chain=bitcoin,join=by <-] (bitcoin end) [below=0.3cm of bitcoin block 5] {$$\vdots$$};
+ \node[on chain=bitcoin,join=by <-] (bitcoin end) {$$\vdots$$};
\node[on chain=ethereum] (ethereum start) {$$\vdots$$};
\node[decision,on chain=ethereum,join=by <-] (ethereum block 1) {\hspace*{1cm}};
