Debugging state reconstruction

Nimbus will start sync automatically as soon as it connects to enough peers. However if you want to run a clean experiment with networking factored out, you can start nimbus with discovery disabled and a single other eth node to sync from. To do so:

1. Launch a local eth node, e.g:

geth --syncmode full --gcmode archive

2. Note the enode url printed in the logs, e.g.: enode://a52e914fa5aa46409e526a342a1e68b4e572c720e6eb1e61ad4a4201937679e7ebd26915bdabb2fdab6add7d85ba537078dbdccca89816a40ffc375572b6f73d@100.67.97.7:30303
3. Launch nimbus with discovery disabled and use the enode from above (make sure to replace the ip address with 127.0.0.1!) as bootnode:

nim c -r ./nimbus/nimbus.nim --port=30304 --nodiscover --bootnodes=enode://a52e914fa5aa46409e526a342a1e68b4e572c720e6eb1e61ad4a4201937679e7ebd26915bdabb2fdab6add7d85ba537078dbdccca89816a40ffc375572b6f73d@127.0.0.1:30303

Nimbus will start syncing with the local eth node.