Use Backoff to wait until success transfer enters DB

[dustinxie]

No description provided.

[codecov]

Codecov Report

Merging #851 into master will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #851      +/-   ##
==========================================
- Coverage    58.8%   58.73%   -0.08%     
==========================================
  Files         149      149              
  Lines       12281    12264      -17     
==========================================
- Hits         7222     7203      -19     
- Misses       4095     4097       +2     
  Partials      964      964

Impacted Files	Coverage Δ
db/trie/branchnode.go	65.59% <0%> (-1.61%)	⬇️
consensus/consensusfsm/fsm.go	86.82% <0%> (-0.72%)	⬇️

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