Store contract ABI on watched_contracts

db/migrations/1512417153_add_abi_to_watched_contracts.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE watched_contracts
+    DROP COLUMN contract_abi;

db/migrations/1512417153_add_abi_to_watched_contracts.up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE watched_contracts
+  ADD COLUMN contract_abi json;

db/schema.sql

@@ -2,8 +2,8 @@
 -- PostgreSQL database dump
 --
 
--- Dumped from database version 10.1
--- Dumped by pg_dump version 10.1
+-- Dumped from database version 10.0
+-- Dumped by pg_dump version 10.0
 
 SET statement_timeout = 0;
 SET lock_timeout = 0;
@@ -124,7 +124,8 @@ ALTER SEQUENCE transactions_id_seq OWNED BY transactions.id;
 
 CREATE TABLE watched_contracts (
     contract_id integer NOT NULL,
-    contract_hash character varying(66)
+    contract_hash character varying(66),
+    contract_abi json
 );
 
 

pkg/repositories/in_memory.go

@@ -20,18 +20,18 @@ func (repository *InMemory) IsWatchedContract(contractHash string) bool {
 }
 
 func (repository *InMemory) FindWatchedContract(contractHash string) *WatchedContract {
-	var transactions []core.Transaction
-	if _, ok := repository.watchedContracts[contractHash]; !ok {
+	watchedContract, ok := repository.watchedContracts[contractHash]
+	if !ok {
 		return nil
 	}
 	for _, block := range repository.blocks {
 		for _, transaction := range block.Transactions {
 			if transaction.To == contractHash {
-				transactions = append(transactions, transaction)
+				watchedContract.Transactions = append(watchedContract.Transactions, transaction)
 			}
 		}
 	}
-	return &WatchedContract{Hash: contractHash, Transactions: transactions}
+	return watchedContract
 }
 
 func (repository *InMemory) MissingBlockNumbers(startingBlockNumber int64, endingBlockNumber int64) []int64 {

pkg/repositories/postgres.go

@@ -32,8 +32,13 @@ func NewPostgres(databaseConfig config.Database) (Postgres, error) {
 }
 
 func (repository Postgres) CreateWatchedContract(contract WatchedContract) error {
+	abi := contract.Abi
+	var abiToInsert *string
+	if abi != "" {
+		abiToInsert = &abi
+	}
 	_, err := repository.Db.Exec(
-		`INSERT INTO watched_contracts (contract_hash) VALUES ($1)`, contract.Hash)
+		`INSERT INTO watched_contracts (contract_hash, contract_abi) VALUES ($1, $2)`, contract.Hash, abiToInsert)
 	if err != nil {
 		return ErrDBInsertFailed
 	}
@@ -50,7 +55,7 @@ func (repository Postgres) IsWatchedContract(contractHash string) bool {
 func (repository Postgres) FindWatchedContract(contractHash string) *WatchedContract {
 	var savedContracts []WatchedContract
 	contractRows, _ := repository.Db.Query(
-		`SELECT contract_hash FROM watched_contracts WHERE contract_hash=$1`, contractHash)
+		`SELECT contract_hash, contract_abi FROM watched_contracts WHERE contract_hash=$1`, contractHash)
 	savedContracts = repository.loadContract(contractRows)
 	if len(savedContracts) > 0 {
 		return &savedContracts[0]
@@ -196,10 +201,11 @@ func (repository Postgres) loadContract(contractRows *sql.Rows) []WatchedContrac
 	var savedContracts []WatchedContract
 	for contractRows.Next() {
 		var savedContractHash string
-		contractRows.Scan(&savedContractHash)
+		var savedContractAbi string
+		contractRows.Scan(&savedContractHash, &savedContractAbi)
 		transactionRows, _ := repository.Db.Query(`SELECT tx_hash, tx_nonce, tx_to, tx_from, tx_gaslimit, tx_gasprice, tx_value FROM transactions WHERE tx_to = $1 ORDER BY block_id desc`, savedContractHash)
 		transactions := repository.loadTransactions(transactionRows)
-		savedContract := WatchedContract{Hash: savedContractHash, Transactions: transactions}
+		savedContract := WatchedContract{Hash: savedContractHash, Transactions: transactions, Abi: savedContractAbi}
 		savedContracts = append(savedContracts, savedContract)
 	}
 	return savedContracts

pkg/repositories/testing/helpers.go

@@ -230,7 +230,6 @@ func AssertRepositoryBehavior(buildRepository func() repositories.Repository) {
 			watchedContract := repository.FindWatchedContract("x123")
 			Expect(watchedContract).ToNot(BeNil())
 			Expect(watchedContract.Transactions).To(BeEmpty())
-
 		})
 
 		It("returns transactions 'To' a watched contract", func() {
@@ -253,6 +252,16 @@ func AssertRepositoryBehavior(buildRepository func() repositories.Repository) {
 					{Hash: "TRANSACTION3", To: "x123"},
 				}))
 		})
+
+		It("stores the ABI of the contract", func() {
+			repository.CreateWatchedContract(repositories.WatchedContract{
+				Abi:  "{\"some\": \"json\"}",
+				Hash: "x123",
+			})
+			watchedContract := repository.FindWatchedContract("x123")
+			Expect(watchedContract).ToNot(BeNil())
+			Expect(watchedContract.Abi).To(Equal("{\"some\": \"json\"}"))
+		})
 	})
 
 }

pkg/repositories/watched_contract.go

@@ -3,6 +3,7 @@ package repositories
 import "github.com/8thlight/vulcanizedb/pkg/core"
 
 type WatchedContract struct {
+	Abi          string
 	Hash         string
 	Transactions []core.Transaction
 }