order submit: don't spam log with standard messages

[robertkowalski]

in case of errors like: "not enough exchange balance" we don't
need the full stack trace which bloats the log files

example:

bfx:hf:server:ws-server:api failed to submit order [bitfinex] Error: ERROR: Invalid order: maximum size for BTCUSD is 2000
    at WSv2._onWSNotification (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:672:41)
    at WSv2._handleAuthMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:1150:14)
    at WSv2._handleChannelMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:769:12)
    at WSv2._onWSMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:729:12)
    at WebSocket.emit (events.js:314:20)
    at Receiver.receiverOnMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/websocket.js:825:20)
    at Receiver.emit (events.js:314:20)
    at Receiver.dataMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:437:14)
    at Receiver.getData (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:367:17)
    at Receiver.startLoop (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:143:22)
    at Receiver._write (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:78:10)
    at doWrite (_stream_writable.js:403:12)
    at writeOrBuffer (_stream_writable.js:387:5)
    at Receiver.Writable.write (_stream_writable.js:318:11)
    at TLSSocket.socketOnData (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/websocket.js:900:35)
    at TLSSocket.emit (events.js:314:20)
    at addChunk (_stream_readable.js:297:12)
    at readableAddChunk (_stream_readable.js:272:9)
    at TLSSocket.Readable.push (_stream_readable.js:213:10)
    at TLSWrap.onStreamRead (internal/stream_base_commons.js:188:23) +12s
  bfx:hf:server:ws-server:api failed to submit order [bitfinex] Error: ERROR: Invalid order: not enough exchange balance for 30 BTCUSD at 50000
    at WSv2._onWSNotification (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:672:41)
    at WSv2._handleAuthMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:1150:14)
    at WSv2._handleChannelMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:769:12)
    at WSv2._onWSMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/lib/transports/ws2.js:729:12)
    at WebSocket.emit (events.js:314:20)
    at Receiver.receiverOnMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/websocket.js:825:20)
    at Receiver.emit (events.js:314:20)
    at Receiver.dataMessage (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:437:14)
    at Receiver.getData (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:367:17)
    at Receiver.startLoop (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:143:22)
    at Receiver._write (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/receiver.js:78:10)
    at doWrite (_stream_writable.js:403:12)
    at writeOrBuffer (_stream_writable.js:387:5)
    at Receiver.Writable.write (_stream_writable.js:318:11)
    at TLSSocket.socketOnData (/Users/robert/bitfinex/bfx-hf-ui/node_modules/bitfinex-api-node/node_modules/ws/lib/websocket.js:900:35)
    at TLSSocket.emit (events.js:314:20)
    at addChunk (_stream_readable.js:297:12)
    at readableAddChunk (_stream_readable.js:272:9)
    at TLSSocket.Readable.push (_stream_readable.js:213:10)
    at TLSWrap.onStreamRead (internal/stream_base_commons.js:188:23) +24s

[ghost]

Perhaps extracting the 'message' property from an Error instance can be implemented in the 'd' function as a wrapper over Debug?

bfx-hf-server/lib/ws_server.js

Line 12 in feb701d

this.d = Debug(`bfx:hf:server:ws-server:${debugName}`)

bfx-hf-server/lib/ws_client.js

Line 22 in feb701d

this.d = Debug(`bfx:hf:server:ws-client:${debugName}`)

Then the logs will contain the 'message' property from an Error instance, for example:

d('failed to submit order', error) // will print error.message if error is isntance of Error or it is an object and contains 'message' property 

Another module I found, is ./lib/capture.js
It seems that it is intended to log the stack trace if necessary, otherwise we can pass an Error instance into 'd'.