Address nonce

[adriantpaez]

We need to support and maintain the nonce value for the addresses. This feature is required by the starknet_getNonce RPC endpoint.

nonce properties:

• Counts all the transactions made by an address
• Its value is relative to a block (or state root)
• nonce never decreases. The nonce for address X at block i+1 is always greater than or equal to the nonce at block i

Solution proposal

We can store the nonce together with the storage root of the address, which means: in the Trie leaf resulting from traversing (following the address) the Trie from the block state root.

[stdevMac]

With the release of starknet 0.10.0 we have the nonce included on L1 and also fetchable from the Feeder Gateway