server: Add the AMOUNT_TYPE domain to the evolution schema (#35)

server/conf/evolutions/default/1.sql

@@ -23,8 +23,11 @@ CHECK (
   VALUE >= 0
 );
 
+CREATE DOMAIN AMOUNT_TYPE AS DECIMAL(30, 15);
+
 # --- !Downs
 
+DROP DOMAIN AMOUNT_TYPE;
 DROP DOMAIN NON_NEGATIVE_INT_TYPE;
 DROP DOMAIN ADDRESS_TYPE;
 DROP DOMAIN TXID_TYPE;

server/conf/evolutions/default/3.sql

@@ -5,8 +5,8 @@
 -- simpler queries while requiring addresses and the available amounts.
 CREATE TABLE balances(
   address ADDRESS_TYPE NOT NULL,
-  received DECIMAL(30, 15) NOT NULL,
-  spent DECIMAL(30, 15) NOT NULL,
+  received AMOUNT_TYPE NOT NULL,
+  spent AMOUNT_TYPE NOT NULL,
   -- constraints
   CONSTRAINT balances_address_pk PRIMARY KEY (address)
 );

server/conf/evolutions/default/4.sql

@@ -18,7 +18,7 @@ CREATE INDEX transactions_time_index ON transactions USING BTREE (time);
 CREATE TABLE transaction_outputs(
   txid TXID_TYPE NOT NULL,
   index NON_NEGATIVE_INT_TYPE NOT NULL,
-  value DECIMAL(30, 15) NOT NULL,
+  value AMOUNT_TYPE NOT NULL,
   address ADDRESS_TYPE NOT NULL,
   hex_script TEXT NOT NULL,
   spent_on TXID_TYPE NULL,
@@ -39,7 +39,7 @@ CREATE TABLE transaction_inputs(
   index NON_NEGATIVE_INT_TYPE NOT NULL,
   from_txid TXID_TYPE NOT NULL,
   from_output_index NON_NEGATIVE_INT_TYPE NOT NULL,
-  value DECIMAL(30, 15) NULL,
+  value AMOUNT_TYPE NULL,
   address ADDRESS_TYPE NULL,
   -- constraints
   CONSTRAINT transaction_inputs_txid_index_pk PRIMARY KEY (txid, index),