fix: return error and reconnect network when the network lost

[ghost]

Warnings are found on analyzing the commit 1ccc92d.

1 warning:

• ⚠️ Goodcheck

We recommend to address them as possible, for example, update outdated dependencies, fix the tool's configuration, configure sider.yml, turn off unused tools, and so on.

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[codecov-commenter]

Codecov Report

Merging #58 into develop will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop      #58   +/-   ##
========================================
  Coverage    52.52%   52.52%           
========================================
  Files           27       27           
  Lines         2496     2496           
========================================
  Hits          1311     1311           
  Misses         968      968           
  Partials       217      217           

Impacted Files	Coverage Δ
client/api_handler.go	51.14% <ø> (ø)

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[fisco-dev]

Here is an overview of what got changed by this pull request:

Complexity increasing per file
==============================
- conn/channel.go  6

Clones added
============
- conn/channel.go  2

See the complete overview on Codacy