update docs (#348)

docs/07-methods.adoc

@@ -146,7 +146,7 @@ Here is the example how to verify the signature with command line, and it can be
 export PUBKEY=testing/dshackle/test_key.pub
 export NONCE=10
 
-export UPSTREAM=infura
+export UPSTREAM=drpc
 export PAYLOAD='["0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", true]'
 
 export SIGNATURE=3045022100be1d730e0e381e25bff64f0fc598d19e31688a01db751098d0ed21847ca785b0022002f5651a0e8d447b0815aeb7b48738cb470cf46d60ee4e2f5bc9c0dc4e072dc3
@@ -258,67 +258,3 @@ Where:
 - `weight` - total network difficulty on that block, as raw bytes
 - `reorg` - number of reorganized blocks, if reorg happened
 
-=== SubscribeBalance or GetBalance
-
-Subscribes to changes (`SubscribeBalance`) or get current (`GetBalance`) balance for a single address, or a set of addresses.
-By default, it supports only main protocol coin (i.e. `bitcoin`, `ether`), but can be configured to support ERC-20 on Ethereum (see link:reference-configuration.adoc[Reference Configuration])
-
-.Request
-[source,proto]
-----
-message BalanceRequest {
-    Asset asset = 1;
-    AnyAddress address = 2;
-}
-
-message AnyAddress {
-    oneof addr_type {
-        SingleAddress address_single = 1;
-        MultiAddress address_multi = 2;
-        XpubAddress address_xpub = 3;
-        ReferenceAddress address_ref = 4;
-    }
-}
-----
-
-.Response
-[source,proto]
-----
-message AddressBalance {
-    Asset asset = 1;
-    SingleAddress address = 2;
-    string balance = 3;
-}
-----
-
-==== SubscribeTxStatus
-
-Subscribes to transaction confirmations.
-Allows to send a transactions and then listen to all changes until it gets enough confirmations.
-Changes are `NOTFOUND -> BROADCASTED <- -> MINED <- -> CONFIRMED`
-
-.Request
-[source,proto]
-----
-message TxStatusRequest {
-    ChainRef chain = 1;
-    string tx_id = 2;
-    uint32 confirmation_limit = 3;
-}
-----
-
-.Response (stream of)
-[source,proto]
-----
-message TxStatus {
-    string tx_id = 1;
-    bool broadcasted = 2;
-    bool mined = 3;
-    BlockInfo block = 4;
-    uint32 confirmations = 5;
-}
-----
-
-=== gRPC Client Libraries
-
-See link:11-client-libraries.adoc[Client Libraries] documentation.