switch from LP to credits

As part of open sourcing the software product, we should consider that
loyalty points are not the best language. Switching to "credits" makes
sense from a lot of points of view.

At the same time, this change allows an achitectural change towards
slots. Slots allow daemon resources to get booked based on the HW ratio
configured in the daemon config.

proto/sgx/app.proto

@@ -83,7 +83,11 @@ message AppNodeListResp {
   string region = 4;
   string city = 5;
   string ip = 6; // required for latency test
-  uint64 price = 7; // nanoLP per unit per minute
+  // TODO: understand slot size for apps
+  // Since apps allow granular tweaking of resources (half a CPU),
+  // the slot size will be a float, not an int. This makes calculations more complex.
+  // We should discuss this when we have time.
+  uint64 price = 7; // nanocredits per slot per month
   repeated string reports = 8; // TODO: this will become an enum
 }
 

proto/shared/general.proto

@@ -47,7 +47,7 @@ message KickReq {
 }
 
 message KickResp {
-  uint64 nano_lp = 1;
+  uint64 nano_credits = 1;
 }
 
 message BanUserReq {

proto/snp/vm.proto

@@ -15,14 +15,14 @@ message VmContract {
   repeated common_proto.MappedPort mapped_ports = 7;
   string vm_public_ipv4 = 8;
   string vm_public_ipv6 = 9;
-  uint32 disk_size_gb = 10;
+  uint32 disk_mib = 10;
   uint32 vcpus = 11;
-  uint32 memory_mb = 12;
+  uint32 memory_mib = 12;
   string kernel_sha = 13;
   string dtrfs_sha = 14;
   string created_at = 15;
   string updated_at = 16;
-  // total nanoLP cost per minute (for all units)
+  // total nanocredits cost per minute (for all units)
   uint64 nano_per_minute = 17;
   uint64 locked_nano = 18;
   string collected_at = 19;
@@ -54,7 +54,7 @@ message RegisterVmNodeReq {
   string country = 4;
   string region = 5;
   string city = 6;
-  // nanoLP per unit per minute
+  // nanocredits per slot per month
   uint64 price = 7;
 }
 
@@ -64,8 +64,8 @@ message VmNodeResources {
   uint32 avail_ipv4 = 3;
   uint32 avail_ipv6 = 4;
   uint32 avail_vcpus = 5;
-  uint32 avail_memory_mb = 6;
+  uint32 avail_memory_mib = 6;
-  uint32 avail_storage_gb = 7;
+  uint32 avail_storage_mib = 7;
   uint32 max_ports_per_vm = 8;
 }
 
@@ -77,9 +77,9 @@ message NewVmReq {
   repeated uint32 extra_ports = 5;
   bool public_ipv4 = 6;
   bool public_ipv6 = 7;
-  uint32 disk_size_gb = 8;
+  uint32 vcpus = 8;
-  uint32 vcpus = 9;
+  uint32 memory_mib = 9;
-  uint32 memory_mb = 10;
+  uint32 disk_mib = 10;
   string kernel_url = 11;
   string kernel_sha = 12;
   string dtrfs_url = 13;
@@ -91,16 +91,19 @@ message NewVmReq {
 message NewVmResp {
   string uuid = 1;
   string error = 2;
-  MeasurementArgs args = 3;
+  uint32 vcpus = 3;
+  uint32 memory_mib = 4;
+  uint32 disk_mib = 5;
+  MeasurementArgs args = 6;
 }
 
 message UpdateVmReq {
   string uuid = 1;
   string hostname = 2;
   string admin_pubkey = 3;
-  uint32 disk_size_gb = 4;
+  uint32 vcpus = 4;
-  uint32 vcpus = 5;
+  uint32 memory_mib = 5;
-  uint32 memory_mb = 6;
+  uint32 disk_mib = 6;
   string kernel_url = 7;
   string kernel_sha = 8;
   string dtrfs_url = 9;
@@ -110,7 +113,10 @@ message UpdateVmReq {
 message UpdateVmResp {
   string uuid = 1;
   string error = 2;
-  MeasurementArgs args = 3;
+  uint32 vcpus = 3;
+  uint32 memory_mib = 4;
+  uint32 disk_mib = 5;
+  MeasurementArgs args = 6;
 }
 
 message DeleteVmReq {
@@ -159,8 +165,8 @@ message VmNodeFilters {
   bool offers_ipv4 = 2;
   bool offers_ipv6 = 3;
   uint32 vcpus = 4;
-  uint32 memory_mb = 5;
+  uint32 memory_mib = 5;
-  uint32 storage_gb = 6;
+  uint32 storage_mib = 6;
   string country = 7;
   string region = 8;
   string city = 9;
@@ -176,7 +182,7 @@ message VmNodeListResp {
   string city = 5;
   string ip = 6; // required for latency test
   repeated string reports = 7; // TODO: this will become an enum
-  uint64 price = 8; // nanoLP per unit per minute
+  uint64 price = 8; // nanocredits per month per slot
 }
 
 message ExtendVmReq {