Add Uniswap contracts addresses to the DeFi API.

internal/graphql/resolvers/defi.go

@@ -71,12 +71,6 @@ func (dt *DefiToken) TotalSupply() (hexutil.Big, error) {
 	return dt.repo.Erc20TotalSupply(&dt.Address)
 }
 
-// DefiConfiguration resolves the current DeFi contract settings.
-func (rs *rootResolver) DefiConfiguration() (*types.DefiSettings, error) {
-	// pass the call to repository
-	return rs.repo.DefiConfiguration()
-}
-
 // ErcTokenBalance resolves the current available balance of the specified token
 // for the specified owner.
 func (rs *rootResolver) ErcTokenBalance(args *struct {

internal/graphql/resolvers/defi_configuration.go

@@ -0,0 +1,48 @@
+// Package resolvers implements GraphQL resolvers to incoming API requests.
+package resolvers
+
+import (
+	"fantom-api-graphql/internal/config"
+	"fantom-api-graphql/internal/repository"
+	"fantom-api-graphql/internal/types"
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// DefiConfiguration represents a resolvable DeFi Configuration instance.
+type DefiConfiguration struct {
+	repo repository.Repository
+	cfg  *config.Config
+	*types.DefiSettings
+}
+
+// NewDefiConfiguration creates a new instance of resolvable DeFi token.
+func NewDefiConfiguration(cf *types.DefiSettings, cfg *config.Config, repo repository.Repository) *DefiConfiguration {
+	return &DefiConfiguration{
+		repo:         repo,
+		cfg:          cfg,
+		DefiSettings: cf,
+	}
+}
+
+// DefiConfiguration resolves the current DeFi contract settings.
+func (rs *rootResolver) DefiConfiguration() (*DefiConfiguration, error) {
+	// pass the call to repository
+	st, err := rs.repo.DefiConfiguration()
+	if err != nil {
+		return nil, err
+	}
+
+	return NewDefiConfiguration(st, rs.cfg, rs.repo), nil
+}
+
+// UniswapCoreFactory returns the address of the Uniswap factory contract
+// from the app configuration.
+func (dfc *DefiConfiguration) UniswapCoreFactory() common.Address {
+	return common.HexToAddress(dfc.cfg.DefiUniswapCore)
+}
+
+// UniswapRouter returns the address of the Uniswap router contract
+// from the app configuration.
+func (dfc *DefiConfiguration) UniswapRouter() common.Address {
+	return common.HexToAddress(dfc.cfg.DefiUniswapRouter)
+}

internal/graphql/resolvers/root.go

@@ -25,6 +25,9 @@ const (
 
 // ApiResolver represents the API interface expected to handle API access points
 type ApiResolver interface {
+	// Config returns the app configuration.
+	Config() *config.Config
+
 	// State resolves current state of the blockchain.
 	State() (CurrentState, error)
 
@@ -153,7 +156,7 @@ type ApiResolver interface {
 	SendTransaction(*struct{ Tx hexutil.Bytes }) (*Transaction, error)
 
 	// DefiConfiguration resolves the current DeFi contract settings.
-	DefiConfiguration() (*types.DefiSettings, error)
+	DefiConfiguration() (*DefiConfiguration, error)
 
 	// DefiTokens resolves list of DeFi tokens available for the DeFi functions.
 	DefiTokens() ([]*DefiToken, error)
@@ -313,3 +316,8 @@ func listLimitCount(count int32, limit uint32) int32 {
 
 	return int32(limit)
 }
+
+// Config returns the application configuration.
+func (rs *rootResolver) Config() *config.Config {
+	return rs.cfg
+}

internal/graphql/schema/bundle.go

@@ -1,6 +1,6 @@
 package gqlschema
 
-// Auto generated GraphQL schema bundle; created 2020-09-22 09:25
+// Auto generated GraphQL schema bundle; created 2020-10-04 20:12
 const schema = `
 # DefiToken represents a token available for DeFi operations.
 type DefiToken {
@@ -791,6 +791,12 @@ type DefiSettings {
 
     # fMintDebtPool is the address of the fMint debt pool.
     fMintDebtPool: Address!
+
+    # uniswapCoreFactory is the address of the Uniswap Core Factory contract.
+    uniswapCoreFactory: Address!
+
+    # uniswapRouter is the address of the Uniswap Router contract.
+    uniswapRouter: Address!
 }
 
 # EstimatedRewards represents a calculated rewards estimation for an account or amount staked

internal/graphql/schema/definition/types/defi_config.graphql

@@ -46,4 +46,10 @@ type DefiSettings {
 
     # fMintDebtPool is the address of the fMint debt pool.
     fMintDebtPool: Address!
+
+    # uniswapCoreFactory is the address of the Uniswap Core Factory contract.
+    uniswapCoreFactory: Address!
+
+    # uniswapRouter is the address of the Uniswap Router contract.
+    uniswapRouter: Address!
 }