feat: adding json string support to bindings config

[gabrielmer]

Description

Supporting setting a node's configuration using a json string

Changes

• parsing json string and setting it to a WakuNodeConf object in createWaku
• implemented function defaultWakuNodeConf() to create a WakuNodeConf instance with the default values defined in external_config.nim
• remove parseCmdArg() functions which are already defined in confutils
• implemented parseCmdArg() for sequences
• removed library/waku_thread/config.nim

How to test

Build libwaku:

make libwaku POSTGRES=1

Set your desired configurations in the following json string:

nwaku/examples/cbindings/waku_example.c

Lines 271 to 287 in 6a1af92

	snprintf(jsonConfig, 2048, "{ \
	\"host\": \"%s\", \
	\"port\": %d, \
	\"key\": \"%s\", \
	\"relay\": %s, \
	\"store\": %s, \
	\"storeDbUrl\": \"%s\", \
	\"storeRetentionPolicy\": \"%s\", \
	\"storeMaxNumDbConnections\": %d \
	}", cfgNode.host,
	cfgNode.port,
	cfgNode.key,
	cfgNode.relay ? "true":"false",
	cfgNode.store ? "true":"false",
	cfgNode.storeDbUrl,
	cfgNode.storeRetentionPolicy,
	cfgNode.storeMaxNumDbConnections);

For example

snprintf(jsonConfig, 2048, "{ \
                                    \"listenAddress\": \"%s\",    \
                                    \"tcpPort\": %d,        \
                                    \"nodekey\": \"%s\",     \
                                    \"relay\": %s,       \
                                    \"store\": %s,       \
                                    \"storeMessageDbUrl\": \"%s\",  \
                                    \"storeMessageRetentionPolicy\": \"%s\",  \
                                    \"storeMaxNumDbConnections\": %d, \
                                    \"pubsubTopics\": %s  \
                                }", cfgNode.host,
                                    cfgNode.port,
                                    cfgNode.key,
                                    cfgNode.relay ? "true":"false",
                                    cfgNode.store ? "true":"false",
                                    cfgNode.storeDbUrl,
                                    cfgNode.storeRetentionPolicy,
                                    cfgNode.storeMaxNumDbConnections,
                                    "[\"/waku/2/rs/1/0\", \"/waku/2/rs/1/1\", \"/waku/2/rs/1/2\", \"/waku/2/rs/1/3\"]"
                                    );

Build waku_example.c:

make cwaku_example

Run waku_example:

./build/cwaku_example --host=0.0.0.0 --peers=/dns4/node-01.do-ams3.wakuv2.test.statusim.net/tcp/30303/p2p/16Uiu2HAmPLe7Mzm8TsYUubgCAW1aJoeFScxrLj8ppHFivPo97bUZ --port=60001 --key=<your_key> 

Issue

closes #2677

[github-actions]

You can find the image built from this PR at

quay.io/wakuorg/nwaku-pr:2685-rln-v2

Built from 3cabc02

[github-actions]

You can find the image built from this PR at

quay.io/wakuorg/nwaku-pr:2685-rln-v1

Built from 3cabc02

[NagyZoltanPeter]

Great work!!!! Thank you!!!

[Ivansete-status]

Amazing! Super elegant and concise!
Thanks for it! 💯

I just added some nitpick comments that I hope you find useful