server: Add the tpos_contracts table

server/conf/evolutions/default/17.sql

@@ -0,0 +1,36 @@
+
+# --- !Ups
+
+CREATE TYPE TPOS_CONTRACT_STATE AS ENUM ('ACTIVE', 'CLOSED');
+
+-- a contract is created using a 1 XSN which is referenced by the (txid, index).
+-- spending the collateral coin cancels the contract,
+CREATE TABLE tpos_contracts(
+  txid TXID_TYPE NOT NULL,
+  index NON_NEGATIVE_INT_TYPE NOT NULL,
+  owner ADDRESS_TYPE NOT NULL,
+  merchant ADDRESS_TYPE NOT NULL,
+  merchant_commission INT NOT NULL,
+  time BIGINT NOT NULL,
+  state TPOS_CONTRACT_STATE NOT NULL,
+  closed_on TXID_TYPE NULL,
+  -- constraints
+  CONSTRAINT tpos_contracts_txid_index_pk PRIMARY KEY (txid, index),
+  CONSTRAINT tpos_contracts_txid_index_fk FOREIGN KEY (txid, index) REFERENCES transaction_outputs (txid, index),
+  CONSTRAINT merchant_commission_percentage CHECK (merchant_commission > 0 AND merchant_commission < 100),
+  CONSTRAINT tpos_contracts_closed_on_fk FOREIGN KEY (closed_on) REFERENCES transactions (txid) ON DELETE SET NULL
+);
+
+CREATE INDEX tpos_contracts_owner_index ON tpos_contracts USING BTREE (owner);
+CREATE INDEX tpos_contracts_merchant_index ON tpos_contracts USING BTREE (merchant);
+CREATE INDEX tpos_contracts_closed_on_index ON tpos_contracts USING BTREE (closed_on);
+
+
+# --- !Downs
+
+DROP INDEX tpos_contracts_closed_on_index;
+DROP INDEX tpos_contracts_merchant_index;
+DROP INDEX tpos_contracts_owner_index;
+DROP TABLE tpos_contracts;
+DROP TYPE TPOS_CONTRACT_STATE;
+