add ws reconnection

[zzhengzhuo]

#627

Firstly, run ganache ganache-cli -b 3 -m "hamster coin cup brief quote trick stove draft hobby strong caught unable" --db ./db

• Test for request
  run example cargo run --package web3 --example transport_ws_loss_connection.
  Got logs

Calling accounts.
Balance of 0xd028d24f16a8893bd078259d413372ac01580769: 99993030720000000000
Balance of 0xd028d24f16a8893bd078259d413372ac01580769: 99993030720000000000

Then restart ganache, got logs:

Get balance failed: Cannot send request. Internal task finished.
Get balance failed: Cannot send request. Internal task finished.
Get balance failed: Cannot send request. Internal task finished.
Balance of 0xd028d24f16a8893bd078259d413372ac01580769: 99993030720000000000
Balance of 0xd028d24f16a8893bd078259d413372ac01580769: 99993030720000000000
Balance of 0xd028d24f16a8893bd078259d413372ac01580769: 99993030720000000000

• Test for subscription
  run example cargo run --package web3 --example contract_log_filter_loss_connection
  Got logs:

Calling accounts.
contract deployed at: 0xfc62…37fa
got tx: 0xbff1b99fd6615750ead80c19d980191910d86cd5635a86a4a259678cc64f94f8
got tx: 0x056e56e3978879d3d72b7c0e0638e6f1d5cdffc2034897eeb5aa6e5fcd2a8f41
Get log: Log { address: 0xfc62729d4553ddde1ad33eca00b28ac2aef937fa, topics: [0xd282f389399565f3671145f5916e51652b60eee8e5c759293a2f5771b8ddfd2e], data: Bytes([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 208, 40, 210, 79, 22, 168, 137, 59, 208, 120, 37, 157, 65, 51, 114, 172, 1, 88, 7, 105]), block_hash: Some(0x8c2e6059e681ca65faf4b0d2eebbac836c36dcbec6c1c850dc57241138d7362d), block_number: Some(44), transaction_hash: Some(0xbff1b99fd6615750ead80c19d980191910d86cd5635a86a4a259678cc64f94f8), transaction_index: Some(0), log_index: Some(0), transaction_log_index: None, log_type: None, removed: Some(false) }
got tx: 0xcfa5b4c8bc4bf4448e73fb2d7efd4dda5150286146fd2564bb72f976a20e4acb
got tx: 0xc3c3c98760e01143633fc4a5bb4800570cf6358b1ebc0eccc2ffef2643452f66
Get log: Log { address: 0xfc62729d4553ddde1ad33eca00b28ac2aef937fa, topics: [0xd282f389399565f3671145f5916e51652b60eee8e5c759293a2f5771b8ddfd2e], data: Bytes([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 208, 40, 210, 79, 22, 168, 137, 59, 208, 120, 37, 157, 65, 51, 114, 172, 1, 88, 7, 105]), block_hash: Some(0x6f70e5987191d222c6fb056147ce3d9e4e8a6dcb8857a14cb8c3f4c5610ed909), block_number: Some(45), transaction_hash: Some(0x056e56e3978879d3d72b7c0e0638e6f1d5cdffc2034897eeb5aa6e5fcd2a8f41), transaction_index: Some(0), log_index: Some(0), transaction_log_index: None, log_type: None, removed: Some(false) }

Then restarted ganache, got logs:

Log Filter Error: WS connection error: Closed
get tx failed: Api error: Cannot send request. Internal task finished.
get filter failed: Cannot send request. Internal task finished.
get tx failed: Api error: Cannot send request. Internal task finished.
get filter failed: Cannot send request. Internal task finished.
get tx failed: Api error: Cannot send request. Internal task finished.
got tx: 0xeef5ee71c5ed18861cd02763e41ff5a502a8c883e1ad6f754222563763f0b831
got tx: 0x8273a2e8e49b265467a3574420a742e03611049f73f212bc8d588cac72e852c8
Get log: Log { address: 0xfc62729d4553ddde1ad33eca00b28ac2aef937fa, topics: [0xd282f389399565f3671145f5916e51652b60eee8e5c759293a2f5771b8ddfd2e], data: Bytes([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 208, 40, 210, 79, 22, 168, 137, 59, 208, 120, 37, 157, 65, 51, 114, 172, 1, 88, 7, 105]), block_hash: Some(0x98b799d67d909361a9face5e4a917b3b214dce5ecedf1790b76dae75661d4bf4), block_number: Some(46), transaction_hash: Some(0xeef5ee71c5ed18861cd02763e41ff5a502a8c883e1ad6f754222563763f0b831), transaction_index: Some(0), log_index: Some(0), transaction_log_index: None, log_type: None, removed: Some(false) }
Get log: Log { address: 0xfc62729d4553ddde1ad33eca00b28ac2aef937fa, topics: [0xd282f389399565f3671145f5916e51652b60eee8e5c759293a2f5771b8ddfd2e], data: Bytes([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 208, 40, 210, 79, 22, 168, 137, 59, 208, 120, 37, 157, 65, 51, 114, 172, 1, 88, 7, 105]), block_hash: Some(0x98b799d67d909361a9face5e4a917b3b214dce5ecedf1790b76dae75661d4bf4), block_number: Some(46), transaction_hash: Some(0x8273a2e8e49b265467a3574420a742e03611049f73f212bc8d588cac72e852c8), transaction_index: Some(1), log_index: Some(0), transaction_log_index: None, log_type: None, removed: Some(false) }

[ffoxdd]

Is this still being considered? This would be very useful for me.