transferFunds: Accept onAccount option

[davidyuk]

closes #1046

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (develop@38abe52). Click here to learn what that means.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             develop    #1060   +/-   ##
==========================================
  Coverage           ?   93.62%           
==========================================
  Files              ?       58           
  Lines              ?     2949           
  Branches           ?        0           
==========================================
  Hits               ?     2761           
  Misses             ?      188           
  Partials           ?        0           

Impacted Files	Coverage Δ
es/chain/index.js	100.00% <ø> (ø)
es/ae/index.js	100.00% <100.00%> (ø)
es/tx/tx.js	96.42% <100.00%> (ø)
es/tx/validator.js	100.00% <100.00%> (ø)
es/utils/swagger.js	81.57% <0.00%> (ø)
es/utils/json-big.js	100.00% <0.00%> (ø)
es/contract/index.js	100.00% <0.00%> (ø)
es/tx/builder/schema.js	96.35% <0.00%> (ø)
es/ae/oracle.js	98.07% <0.00%> (ø)
es/contract/ga/index.js	100.00% <0.00%> (ø)
... and 52 more

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