genesis: rework genesis

genesis/gen_test.go

+// Copyright 2015-2017 Monax Industries Limited.
+// This file is part of the Monax platform (Monax)
+
+// Monax is free software: you can use, redistribute it and/or modify
+// it only under the terms of the GNU General Public License, version
+// 3, as published by the Free Software Foundation.
+
+// Monax is distributed WITHOUT ANY WARRANTY pursuant to
+// the terms of the Gnu General Public Licence, version 3, including
+// (but not limited to) Clause 15 thereof. See the text of the
+// GNU General Public License, version 3 for full terms.
+
+// You should have received a copy of the GNU General Public License,
+// version 3, with Monax.  If not, see <http://www.gnu.org/licenses/>.
+
 package genesis
 
 import (

genesis/genesis.go

+// Copyright 2015-2017 Monax Industries Limited.
+// This file is part of the Monax platform (Monax)
+
+// Monax is free software: you can use, redistribute it and/or modify
+// it only under the terms of the GNU General Public License, version
+// 3, as published by the Free Software Foundation.
+
+// Monax is distributed WITHOUT ANY WARRANTY pursuant to
+// the terms of the Gnu General Public Licence, version 3, including
+// (but not limited to) Clause 15 thereof. See the text of the
+// GNU General Public License, version 3 for full terms.
+
+// You should have received a copy of the GNU General Public License,
+// version 3, with Monax.  If not, see <http://www.gnu.org/licenses/>.
+
+package genesis
+
+import (
+	"bytes"
+	"encoding/json"
+	"time"
+
+	ptypes "github.com/eris-ltd/eris-db/permission/types"
+	wire "github.com/tendermint/go-wire"
+)
+
+// MakeGenesisDocFromAccounts takes a chainName and a slice of GenesisAccount,
+// and a slice of GenesisValidator to construct a GenesisDoc, or returns an error on
+// failure.  In particular MakeGenesisDocFromAccount uses the local time as a
+// timestamp for the GenesisDoc.
+func MakeGenesisDocFromAccounts(chainName string, accounts []*GenesisAccount, validators []*GenesisValidator) (
+	GenesisDoc, error) {
+
+	// TODO: assert valid accounts and validators
+	// TODO: [ben] expose setting global permissions
+	globalPermissions := ptypes.DefaultAccountPermissions.Clone()
+	genesisParameters := &GenesisParams{
+		GlobalPermissions: &globalPermissions,
+	}
+	// copy slices of validators and accounts
+	accountsCopy := make([]GenesisAccount, len(accounts))
+	copy(accountsCopy, accounts)
+
+	genesisDoc := GenesisDoc{
+		GenesisTime: time.Now(),
+		// TODO: this needs to be corrected for ChainName, and ChainId
+		// is the derived hash from the GenesisDoc serialised bytes
+		ChainID:    chainName,
+		Params:     genesisParameters,
+		Accounts:   accounts,
+		Validators: validators,
+	}
+	return genesisDoc, nil
+}
+
+// GetGenesisFileBytes returns the JSON (not-yet) canonical bytes for a given
+// GenesisDoc or an error.  In a first rewrite, rely on go-wire
+// for the JSON serialisation with type-bytes.
+func GetGenesisFileBytes(genesisDoc *GenesisDoc) ([]byte, error) {
+
+	// TODO: write JSON in canonical order
+
+	buffer, n, err := new(bytes.Buffer), new(int), new(error)
+	// write JSON with go-wire type-bytes (for public keys); deprecate
+	wire.WriteJSON(genesisDoc, buffer, n, &err)
+	if err != nil {
+		return nil, err
+	}
+	// rewrite buffer with indentation
+	indentedBuffer := new(bytes.Buffer)
+	if err := json.Indent(indentedBuffer, buffer.Bytes(), "", "\t"); err != nil {
+		return nil, err
+	}
+	return indentedBuffer.Bytes(), nil
+}

genesis/genesis_test.go

+// Copyright 2015-2017 Monax Industries Limited.
+// This file is part of the Monax platform (Monax)
+
+// Monax is free software: you can use, redistribute it and/or modify
+// it only under the terms of the GNU General Public License, version
+// 3, as published by the Free Software Foundation.
+
+// Monax is distributed WITHOUT ANY WARRANTY pursuant to
+// the terms of the Gnu General Public Licence, version 3, including
+// (but not limited to) Clause 15 thereof. See the text of the
+// GNU General Public License, version 3 for full terms.
+
+// You should have received a copy of the GNU General Public License,
+// version 3, with Monax.  If not, see <http://www.gnu.org/licenses/>.
+
+package genesis
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestGenesisFileBytes(t *testing.T) {
+
+}

genesis/types.go

+// Copyright 2015-2017 Monax Industries Limited.
+// This file is part of the Monax platform (Monax)
+
+// Monax is free software: you can use, redistribute it and/or modify
+// it only under the terms of the GNU General Public License, version
+// 3, as published by the Free Software Foundation.
+
+// Monax is distributed WITHOUT ANY WARRANTY pursuant to
+// the terms of the Gnu General Public Licence, version 3, including
+// (but not limited to) Clause 15 thereof. See the text of the
+// GNU General Public License, version 3 for full terms.
+
+// You should have received a copy of the GNU General Public License,
+// version 3, with Monax.  If not, see <http://www.gnu.org/licenses/>.
+
 package genesis
 
 import (
@@ -78,3 +93,57 @@ func GenesisDocFromJSON(jsonBlob []byte) (genState *GenesisDoc) {
 	}
 	return
 }
+
+//------------------------------------------------------------
+// Methods for genesis types
+// NOTE: breaks formatting convention
+// TODO: split each genesis type in its own file definition
+
+//------------------------------------------------------------
+// GenesisAccount methods
+
+// Clone clones the genesis account
+func (genesisAccount *GenesisAccount) Clone() GenesisAccount {
+	// clone the address
+	addressClone := make([]byte, len(genesisAccount.Address))
+	copy(addressClone, genesisAccount.Address)
+	// clone the account permissions
+	accountPermissionsClone := genesisAccount.Permissions.Clone()
+	return GenesisAccount{
+		Address:     addressClone,
+		Amount:      genesisAccount.Amount,
+		Name:        genesisAccount.Name,
+		Permissions: &accountPermissionsClone,
+	}
+}
+
+//------------------------------------------------------------
+// GenesisValidator methods
+
+// Clone clones the genesis validator
+func (genesisValidator *GenesisValidator) Clone() GenesisValidator {
+	// clone the public key
+	
+	// clone the account permissions
+	accountPermissionsClone := genesisAccount.Permissions.Clone()
+	return GenesisAccount{
+		Address:     addressClone,
+		Amount:      genesisAccount.amount,
+		Name:        genesisAccount.Name,
+		Permissions: &accountPermissionsClone,
+	}
+}
+
+//------------------------------------------------------------
+// BasicAccount methods
+
+// Clone clones the basic account
+func (basicAccount *BasicAccount) Clone() BasicAccount {
+	// clone the address
+	addressClone := make([]byte, len(basicAccount.Address))
+	copy(addressClone, basicAccount.Address)
+	return GenesisAccount{
+		Address:     addressClone,
+		Amount:      basicAccount.Amount,
+	}
+}
\ No newline at end of file

permission/types/permissions.go

@@ -162,6 +162,21 @@ func (aP *AccountPermissions) RmRole(role string) bool {
 	return false
 }
 
+// Clone clones the account permissions
+func (accountPermissions *AccountPermissions) Clone() AccountPermissions {
+	// clone base permissions
+	basePermissionsClone := accountPermissions.Base
+	// clone roles []string
+	rolesClone := make([]string, len(accountPermissions.Roles))
+	// strings are immutable so copy suffices
+	copy(rolesClone, accountPermissions.Roles)
+
+	return AccountPermissions{
+		Base:  basePermissionsClone,
+		Roles: rolesClone,
+	}
+}
+
 //--------------------------------------------------------------------------------
 // string utilities