[api] return evm address instead of oasis addr in RuntimeEvmBalance

storage/client/client.go

@@ -1393,16 +1393,18 @@ func (c *StorageClient) RuntimeAccount(ctx context.Context, address staking.Addr
 
 	for runtimeEvmRows.Next() {
 		b := RuntimeEvmBalance{}
+		var addrPreimage []byte
 		if err = runtimeEvmRows.Scan(
 			&b.Balance,
-			&b.TokenContractAddr,
+			&addrPreimage,
 			&b.TokenSymbol,
 			&b.TokenName,
 			&b.TokenType,
 			&b.TokenDecimals,
 		); err != nil {
 			return nil, wrapError(err)
 		}
+		b.TokenContractAddr = ethCommon.BytesToAddress(addrPreimage).String()
 		a.EvmBalances = append(a.EvmBalances, b)
 	}
 

storage/client/queries/queries.go

@@ -521,7 +521,7 @@ const (
 	AccountRuntimeEvmBalances = `
 		SELECT
 			balances.balance AS balance,
-			balances.token_address AS token_address,
+			preimages.address_data AS token_address,
 			tokens.symbol AS token_symbol,
 			tokens.token_name AS token_name,
 			CASE -- NOTE: There are two queries that use this CASE via copy-paste; edit both if changing.
@@ -531,6 +531,7 @@ const (
 			END AS token_type,
 			tokens.decimals AS token_decimals
 		FROM chain.evm_token_balances AS balances
+		JOIN chain.address_preimages AS preimages ON (preimages.address = balances.token_address AND preimages.context_identifier = 'oasis-runtime-sdk/address: secp256k1eth' AND preimages.context_version = 0)
 		JOIN chain.evm_tokens         AS tokens USING (runtime, token_address)
 		WHERE runtime = $1 AND
 			balances.account_address = $2::text AND