add cancelOrder interface

Helius

2020-12-24 461a0bb4d550d959bd5eeb0b2d92aac696ad476b

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# Windows
[Dd]esktop.ini
Thumbs.db
$RECYCLE.BIN/
.idea/
 
# macOS
.DS_Store
.fseventsd
.Spotlight-V100
.TemporaryItems
.Trashes
 
# Node.js
node_modules/