Interface BigMapAlloc

Corresponds to RPC schema (updates correspond to BigMapUpdate-s):

{ // big_map
     "kind": "big_map",
     "id": $008-PtEdo2Zk.big_map_id,
     "diff": { // update
         "action": "update",
         "updates":
             [ { "key_hash": $script_expr,
                 "key": $micheline.008-PtEdo2Zk.michelson_v1.expression,
                 "value"?: $micheline.008-PtEdo2Zk.michelson_v1.expression } ... ],
         "key_type": $micheline.008-PtEdo2Zk.michelson_v1.expression,
         "value_type": $micheline.008-PtEdo2Zk.michelson_v1.expression } }

and until Delphi protocol (including) to RPC schema:

{ // alloc
     "action": "alloc",
     "big_map": $bignum,
     "key_type": $micheline.007-PsDELPH1.michelson_v1.expression,
     "value_type": $micheline.007-PsDELPH1.michelson_v1.expression }