Add tool to get list of transactions from future transaction queue

[oleksandrSydorenkoJ]

Ethereum has a default eth_pendingTransactions method that returns all pending transactions, which may be included in the next block.
After enabling the multi-transaction mode we need a tool to check the future transaction queue.

[dimalit]

Blocked by #1772

[DmytroNazarenko]

skaled: 3.18.0-beta.0

[oleksandrSydorenkoJ]

debug_getFutureTransactions call doesn't included to skalenetwork/schain:3.18.0-beta.0

[DmytroNazarenko]

skaled: 3.18.0-beta.1

[oleksandrSydorenkoJ]

Related to #1749

Verified on Regression network
skaled: 3.18.0-beta.1 with options "-v 3", "--web3-trace", "--enable-debug-behavior-apis", "--aa no"

Call
curl -X POST --data '{"id":4,"jsonrpc":"2.0","method":"debug_getFutureTransactions","params":[]}' http://34.217.221.118:10259

Response

{"id":4,"jsonrpc":"2.0","result":[{"from":"0x71cbe3fede33905d4d1bf2bd51f9d4a62375e659","gas":"0x5208","gasPrice":"0x186a0","hash":"0xabf60b5204c289e7e46d4db51e4e94656ca086067ef742d850e599ff23c41af4","nonce":"0x1","r":"0x1a49b4cf4b12288cbfb1b7a57fc19629ac9e5f190ff1f71ba3c3ab50c4dc65d2","s":"0x430f42db7f4464b0c6b83fefbfefd316a0e9945c911ad52d825a8185fc6e4ebf","sighash":"0x9356c53d2b45dba67dd6c94449589eb8fa8e51c1a9315220715f56208a010a08","to":"0xa68f946090c600eda6f139783077ee802afeb990","v":"0x1","value":"0x0"},{"from":"0x71cbe3fede33905d4d1bf2bd51f9d4a62375e659","gas":"0x5208","gasPrice":"0x186a0","hash":"0x27b9d3d062f33e09f39cd2fe80268ceba9d5ad92e87d55cf75f2ab15db0090e2","nonce":"0x2","r":"0xcf0e480a67cdca3252d0c7f91d085dcefea45c7c85265872fe621cbadb8b5daf","s":"0x307a76444ca27d67e548497c85f953a21b324430b061e64bc175711b697fc18a","sighash":"0xd8d649f8a276f3332bd5af44d0d73b8aff0146ed0a38c27c61203d43b299cbff","to":"0xa68f946090c600eda6f139783077ee802afeb990","v":"0x0","value":"0x0"},{"from":"0x71cbe3fede33905d4d1bf2bd51f9d4a62375e659","gas":"0x5208","gasPrice":"0x186a0","hash":"0xb0379401b98d83ee54c4fea6ada28ba25752bcc9afd3e890ce5545e38fc812c3","nonce":"0x3","r":"0x43a788a3f7d9735ddf66d46ee374851c744ddc068db5a0222f3c4400b59bb3db","s":"0x395e9b4fe67b9ba4b9f22719293d058db4724ba41b8eb834552b5919404e2bfd","sighash":"0xea849aba82873fadff4bc7912e37ba22e287173af3f641f6e687fa7331d72efb","to":"0xa68f946090c600eda6f139783077ee802afeb990","v":"0x0","value":"0x0"},{"from":"0x71cbe3fede33905d4d1bf2bd51f9d4a62375e659","gas":"0x5208","gasPrice":"0x186a0","hash":"0x019bb25a7ced019eb0df57c62927800bf4c8892ff48071b3a9d2425856c22895","nonce":"0x4","r":"0xed4bf3251cef790da718cf17138488ffdbc568900b636d2f17c624ec3bcb430a","s":"0x661d65dd299188f462487601407d8d40d31b8944cb1ab5ed4e66e791459d5347","sighash":"0xefced3972e57bc15c62b6d6990a718bb9f8ea4f9904f72b656c085cbd941ea0e","to":"0xa68f946090c600eda6f139783077ee802afeb990","v":"0x0","value":"0x0"}]}