diff --git a/compiler.go b/compiler.go
index 51ed17e..9452a98 100644
--- a/compiler.go
+++ b/compiler.go
@@ -17,8 +17,8 @@ type rawCompilerOutput struct {
 	Contracts map[string]contract.RawCompiledContract
 }
 
-func (o *rawCompilerOutput) CompiledContracts() map[string]contract.CompiledContract {
-	contracts := make(map[string]contract.CompiledContract)
+func (o *rawCompilerOutput) CompiledContracts() contract.CompiledContracts {
+	contracts := make(contract.CompiledContracts)
 
 	for name, rawContract := range o.Contracts {
 		if len(rawContract.Bin) == 0 {
@@ -32,14 +32,15 @@ func (o *rawCompilerOutput) CompiledContracts() map[string]contract.CompiledCont
 			contractName = parts[1]
 		}
 
-		compiledContract := contract.CompiledContract{
+		compiledContract := &contract.CompiledContract{
+			Source:       name,
 			Name:         contractName,
 			Bin:          rawContract.Bin,
 			BinKeccak256: rawContract.BinHash256(),
 			ABI:          rawContract.Metadata.Output.ABI,
 		}
 
-		contracts[contractName] = compiledContract
+		contracts[name] = compiledContract
 	}
 
 	return contracts
@@ -64,27 +65,59 @@ type Compiler struct {
 	Filename string
 	Opts     CompilerOptions
 	Repo     *contract.ContractsRepository
+
+	compiledContracts contract.CompiledContracts
+}
+
+func (c *Compiler) mainContractSource() string {
+	mainContractName := basenameNoExt(c.Filename)
+
+	return c.Filename + ":" + mainContractName
+}
+
+func (c *Compiler) mainContractName() string {
+	mainContractName := basenameNoExt(c.Filename)
+	return mainContractName
 }
 
 // Compile returns only the contract that has the same name as the source file
 func (c *Compiler) Compile() (*contract.CompiledContract, error) {
-	mainContractName := basenameNoExt(c.Filename)
 
-	contracts, err := c.CompileAll()
+	contracts, err := c.getCompiledContracts()
 	if err != nil {
 		return nil, err
 	}
 
-	contract, ok := contracts[mainContractName]
+	contractSrc := c.mainContractSource()
+	contract, ok := contracts[contractSrc]
 	if !ok {
-		return nil, errors.Errorf("cannot find contract: %s", mainContractName)
+		return nil, errors.Errorf("cannot find contract: %s", c.mainContractName())
+	}
+
+	return contract, nil
+}
+
+func (c *Compiler) RelatedContracts() (contract.CompiledContracts, error) {
+	contracts, err := c.getCompiledContracts()
+	if err != nil {
+		return nil, err
 	}
 
-	return &contract, nil
+	contractSrc := c.mainContractSource()
+	relatedContracts := make(contract.CompiledContracts)
+	for name, contract := range contracts {
+		if name == contractSrc {
+			continue
+		}
+
+		relatedContracts[name] = contract
+	}
+
+	return relatedContracts, nil
 }
 
 // CompileAll returns all contracts in a source file
-func (c *Compiler) CompileAll() (map[string]contract.CompiledContract, error) {
+func (c *Compiler) compileAll() (contract.CompiledContracts, error) {
 	_, err := os.Stat(c.Filename)
 
 	if err != nil && os.IsNotExist(err) {
@@ -99,6 +132,20 @@ func (c *Compiler) CompileAll() (map[string]contract.CompiledContract, error) {
 	return output.CompiledContracts(), nil
 }
 
+func (c *Compiler) getCompiledContracts() (contract.CompiledContracts, error) {
+	if c.compiledContracts != nil {
+		return c.compiledContracts, nil
+	}
+
+	contracts, err := c.compileAll()
+	if err != nil {
+		return nil, err
+	}
+
+	c.compiledContracts = contracts
+	return contracts, nil
+}
+
 func (c *Compiler) execSolc() (*rawCompilerOutput, error) {
 	opts := c.Opts
 
diff --git a/contract/compiledContract.go b/contract/compiledContract.go
index 340bc76..af70ce9 100644
--- a/contract/compiledContract.go
+++ b/contract/compiledContract.go
@@ -31,9 +31,11 @@ type ABIType struct {
 }
 
 type CompiledContract struct {
-	Name string          `json:"name"`
-	ABI  []ABIDefinition `json:"abi"`
-	Bin  Bytes           `json:"bin"`
+	// Where the contract is defined
+	Source string          `json:"source"`
+	Name   string          `json:"name"`
+	ABI    []ABIDefinition `json:"abi"`
+	Bin    Bytes           `json:"bin"`
 	// KECAAK256 of bytecode without auxdata
 	BinKeccak256 Bytes `json:"binhash"`
 }
diff --git a/contract/contractsRepo.go b/contract/contractsRepo.go
index c3af913..b91e3c1 100644
--- a/contract/contractsRepo.go
+++ b/contract/contractsRepo.go
@@ -10,6 +10,8 @@ import (
 	"github.com/pkg/errors"
 )
 
+type CompiledContracts map[string]*CompiledContract
+
 type DeployedContracts map[string]*DeployedContract
 
 type DeployedContract struct {
@@ -30,6 +32,9 @@ type ContractsRepository struct {
 	filepath  string
 	Contracts DeployedContracts `json:"contracts"`
 	Libraries DeployedContracts `json:"libraries"`
+
+	// ABI definitions related to the contracts, but not deployed.
+	Related CompiledContracts `json:"related"`
 }
 
 func OpenContractsRepository(filepath string) (repo *ContractsRepository, err error) {
@@ -39,6 +44,7 @@ func OpenContractsRepository(filepath string) (repo *ContractsRepository, err er
 			filepath:  filepath,
 			Contracts: make(DeployedContracts),
 			Libraries: make(DeployedContracts),
+			Related:   make(CompiledContracts),
 		}, nil
 	}
 
@@ -65,6 +71,10 @@ func OpenContractsRepository(filepath string) (repo *ContractsRepository, err er
 		repo.Contracts = make(DeployedContracts)
 	}
 
+	if repo.Related == nil {
+		repo.Related = make(CompiledContracts)
+	}
+
 	return
 }
 
diff --git a/deploy.go b/deploy.go
index f88f948..d03307e 100644
--- a/deploy.go
+++ b/deploy.go
@@ -1,11 +1,12 @@
 package solar
 
 import (
-	"github.com/qtumproject/solar/contract"
 	"fmt"
 	"log"
 	"strings"
 
+	"github.com/qtumproject/solar/contract"
+
 	"github.com/pkg/errors"
 )
 
@@ -80,6 +81,23 @@ func init() {
 			return
 		}
 
+		// Add related contracts to repo
+		relatedContracts, err := compiler.RelatedContracts()
+		if err != nil {
+			return err
+		}
+
+		if len(relatedContracts) > 0 {
+			for name, c := range relatedContracts {
+				repo.Related[name] = c
+			}
+
+			err = repo.Commit()
+			if err != nil {
+				return
+			}
+		}
+
 		newContracts := repo.UnconfirmedContracts()
 		if *noconfirm == false && len(newContracts) != 0 {
 			// Force local chain to generate a block immediately.
diff --git a/deployer/qtum/qtumDeployer.go b/deployer/qtum/qtumDeployer.go
index 9173bb0..8a4a3ec 100644
--- a/deployer/qtum/qtumDeployer.go
+++ b/deployer/qtum/qtumDeployer.go
@@ -26,7 +26,7 @@ func NewDeployer(rpcURL *url.URL, repo *contract.ContractsRepository, senderAddr
 			BaseURL: rpcURL,
 		},
 		ContractsRepository: repo,
-		senderAddress: senderAddress,
+		senderAddress:       senderAddress,
 	}, nil
 }
 
@@ -80,7 +80,7 @@ func (d *Deployer) CreateContract(c *contract.CompiledContract, jsonParams []byt
 		args = append(args, d.senderAddress)
 	}
 
-	err = d.rpc.Call(&tx,"createcontract", args...)
+	err = d.rpc.Call(&tx, "createcontract", args...)
 
 	if err != nil {
 		return errors.Wrap(err, "createcontract")