Fuzz tests to explore attacks against reputation.

Note that generally we require that a node can get at least $1 of HTLCs endorsed for them to be considered to have sufficiently interesting reputation to attack.

Fuzzing coverage for a laddering attack against our proposed reputation algorithm.

See sheet for visual walkthrough.

go test -v -fuzz=FuzzLadderAttack

Fuzzing coverage for surge attacks that inflate the value of a node's outgoing link to cut peers reputation off.

go test -v -fuzz=FuzzSurgeAttack