java.lang.IllegalArgumentException: Failed to create query method in a JpaRepository

I use the technologies jpa, hibernate, spring boot - data, api REST.

I have the following error:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'walletRestService': Unsatisfied dependency expressed through field 'walletRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'walletRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query method public abstract java.lang.Long com.wj.dao.WalletRepository.createWallet(java.lang.Long,java.lang.String)! No property createWallet found for type Wallet!

Here is my code :

Entity user:

package com.wj.entities;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;

import com.fasterxml.jackson.annotation.JsonManagedReference;

@Entity
public class User implements Serializable{

@Id
@GeneratedValue
private Long id; 
private String name;

@OneToMany(mappedBy="user", fetch=FetchType.LAZY)
@JsonManagedReference
private List<Wallet> wallets = new ArrayList<>();

public User() {
    super();
}

public User(String name) {
    super();
    this.name = name;
}



public User(Long id, String name) {
    super();
    this.id = id;
    this.name = name;
}



public User(Long id, String name, List<Wallet> wallets) {
    super();
    this.id = id;
    this.name = name;
    this.wallets = wallets;
}

public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public List<Wallet> getWallets() {
    return wallets;
}

public void setWallets(List<Wallet> wallets) {
    this.wallets = wallets;
}


}

Entity wallet:

@Id
@GeneratedValue
private Long id;
private String name;
@ManyToOne
@JoinColumn(name="user_id")
@JsonBackReference    
private User user;

public Wallet() {
    super();
}




public Wallet(String name, User user) {
    super();
    this.name = name;
    this.user = user;
}




public Wallet(Long id, String name, User user) {
    super();
    this.id = id;
    this.name = name;
    this.user = user;
}



public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public User getUser() {
    return user;
}

public void setUser(User user) {
    this.user = user;
}


}

restApi:

@RequestMapping(value="/wallets", method=RequestMethod.POST)
public Wallet save(@RequestBody Wallet wallet) {
    User user = wallet.getUser();

    Long id = walletRepository.createWallet(user.getId(), wallet.getName());
    User boundUser = wallet.getUser();
    User simpleUser = new User(boundUser.getId(), boundUser.getName());
    wallet = new Wallet(id, wallet.getName(), simpleUser);
    return walletRepository.save(wallet);
}

DAO:  

package com.wj.dao;
import org.springframework.data.jpa.repository.JpaRepository;
import com.wj.entities.Wallet;

public interface WalletRepository extends JpaRepository<Wallet, Long>{
   Long createWallet(Long id, String name);
}