select distinct token transfers by transaction hash

apps/block_scout_web/lib/block_scout_web/controllers/address_token_transfer_controller.ex

@@ -170,7 +170,6 @@ defmodule BlockScoutWeb.AddressTokenTransferController do
       ) do
     with {:ok, address_hash} <- Chain.string_to_address_hash(address_hash_string),
          {:ok, address} <- Chain.hash_to_address(address_hash) do
-
       render(
         conn,
         "index.html",

apps/explorer/lib/explorer/chain/token_transfer.ex

@@ -215,7 +215,8 @@ defmodule Explorer.Chain.TokenTransfer do
       from(
         tt in TokenTransfer,
         where: tt.to_address_hash == ^address_hash,
-        select: type(tt.transaction_hash, :binary)
+        select: type(tt.transaction_hash, :binary),
+        distinct: tt.transaction_hash
       )
 
     query
@@ -229,7 +230,8 @@ defmodule Explorer.Chain.TokenTransfer do
       from(
         tt in TokenTransfer,
         where: tt.from_address_hash == ^address_hash,
-        select: type(tt.transaction_hash, :binary)
+        select: type(tt.transaction_hash, :binary),
+        distinct: tt.transaction_hash
       )
 
     query
@@ -249,6 +251,7 @@ defmodule Explorer.Chain.TokenTransfer do
       from(token_transfer in TokenTransfer,
         where: token_transfer.to_address_hash == ^address_bytes or token_transfer.from_address_hash == ^address_bytes,
         select: type(token_transfer.transaction_hash, :binary),
+        distinct: token_transfer.transaction_hash,
         limit: ^page_size
       )