feat: github oracle

examples/gno.land/p/demo/teritori/binutils/binutils.gno

@@ -0,0 +1,34 @@
+package binutils
+
+import (
+	"encoding/binary"
+	"errors"
+)
+
+var ErrInvalidLengthPrefixedString = errors.New("invalid length-prefixed string")
+
+func EncodeLengthPrefixedStringUint16BE(s string) []byte {
+	b := make([]byte, 2+len(s))
+	binary.BigEndian.PutUint16(b, uint16(len(s)))
+	copy(b[2:], s)
+	return b
+}
+
+func DecodeLengthPrefixedStringUint16BE(b []byte) (string, []byte, error) {
+	if len(b) < 2 {
+		return "", nil, ErrInvalidLengthPrefixedString
+	}
+	l := binary.BigEndian.Uint16(b)
+	if len(b) < 2+int(l) {
+		return "", nil, ErrInvalidLengthPrefixedString
+	}
+	return string(b[2 : 2+l]), b[l+2:], nil
+}
+
+func MustDecodeLengthPrefixedStringUint16BE(b []byte) (string, []byte) {
+	s, r, err := DecodeLengthPrefixedStringUint16BE(b)
+	if err != nil {
+		panic(err)
+	}
+	return s, r
+}

examples/gno.land/p/demo/teritori/binutils/gno.mod

@@ -0,0 +1 @@
+module gno.land/p/demo/teritori/binutils

examples/gno.land/p/demo/teritori/dao_core/dao_core.gno

@@ -0,0 +1,183 @@
+package core
+
+import (
+	"std"
+
+	dao_interfaces "gno.land/p/demo/teritori/dao_interfaces"
+	"gno.land/p/demo/teritori/markdown_utils"
+)
+
+// TODO: add wrapper message handler to handle multiple proposal modules messages
+
+type daoCore struct {
+	dao_interfaces.IDAOCore
+
+	votingModule              dao_interfaces.IVotingModule
+	proposalModules           []dao_interfaces.ActivableProposalModule
+	activeProposalModuleCount int
+	realm                     std.Realm
+	registry                  *dao_interfaces.MessagesRegistry
+}
+
+func NewDAOCore(
+	votingModuleFactory dao_interfaces.VotingModuleFactory,
+	proposalModulesFactories []dao_interfaces.ProposalModuleFactory,
+	messageHandlersFactories []dao_interfaces.MessageHandlerFactory,
+) dao_interfaces.IDAOCore {
+	if votingModuleFactory == nil {
+		panic("Missing voting module factory")
+	}
+
+	if len(proposalModulesFactories) == 0 {
+		panic("No proposal modules factories")
+	}
+
+	core := &daoCore{
+		realm:                     std.CurrentRealm(),
+		activeProposalModuleCount: len(proposalModulesFactories),
+		registry:                  dao_interfaces.NewMessagesRegistry(),
+		proposalModules:           make([]dao_interfaces.ActivableProposalModule, len(proposalModulesFactories)),
+	}
+
+	core.votingModule = votingModuleFactory(core)
+	if core.votingModule == nil {
+		panic("voting module factory returned nil")
+	}
+
+	for i, modFactory := range proposalModulesFactories {
+		mod := modFactory(core)
+		if mod == nil {
+			panic("proposal module factory returned nil")
+		}
+		core.proposalModules[i] = dao_interfaces.ActivableProposalModule{
+			Enabled: true,
+			Module:  mod,
+		}
+	}
+
+	// this registry is specific to gno since we can't do dynamic calls
+	core.registry.Register(NewUpdateVotingModuleMessageHandler(core))
+	core.registry.Register(NewUpdateProposalModulesMessageHandler(core))
+	for _, handlerFactory := range messageHandlersFactories {
+		handler := handlerFactory(core)
+		if handler == nil {
+			panic("message handler factory returned nil")
+		}
+		core.registry.Register(handler)
+	}
+
+	return core
+}
+
+// mutations
+
+func (d *daoCore) UpdateVotingModule(newVotingModule dao_interfaces.IVotingModule) {
+	if std.CurrentRealm().Addr() != d.realm.Addr() { // not sure this check necessary since the ownership system should protect against mutation from other realms
+		panic(ErrUnauthorized)
+	}
+
+	// FIXME: check da0-da0 implem
+	d.votingModule = newVotingModule
+}
+
+func (d *daoCore) UpdateProposalModules(toAdd []dao_interfaces.IProposalModule, toDisable []int) {
+	if std.CurrentRealm().Addr() != d.realm.Addr() { // not sure this check necessary since the ownership system should protect against mutation from other realms
+		panic(ErrUnauthorized)
+	}
+
+	for _, module := range toAdd {
+		d.addProposalModule(module)
+	}
+
+	for _, moduleIndex := range toDisable {
+		module := GetProposalModule(d, moduleIndex)
+
+		if !module.Enabled {
+			panic(ErrModuleAlreadyDisabled)
+		}
+		module.Enabled = false
+
+		d.activeProposalModuleCount--
+		if d.activeProposalModuleCount == 0 {
+			panic("no active proposal modules") // this -> `panic(ErrNoActiveProposalModules)` triggers `panic: reflect: reflect.Value.SetString using value obtained using unexported field`
+		}
+	}
+}
+
+// queries
+
+func (d *daoCore) ProposalModules() []dao_interfaces.ActivableProposalModule {
+	return d.proposalModules
+}
+
+func (d *daoCore) VotingModule() dao_interfaces.IVotingModule {
+	return d.votingModule
+}
+
+func (d *daoCore) VotingPowerAtHeight(address std.Address, height int64) uint64 {
+	return d.VotingModule().VotingPowerAtHeight(address, height)
+}
+
+func (d *daoCore) ActiveProposalModuleCount() int {
+	return d.activeProposalModuleCount
+}
+
+func (d *daoCore) Render(path string) string {
+	s := "# DAO Core\n"
+	s += "This is an attempt at porting [DA0-DA0 contracts](https://github.com/DA0-DA0/dao-contracts)\n"
+	s += markdown_utils.Indent(d.votingModule.Render(path)) + "\n"
+	for _, propMod := range d.proposalModules {
+		if !propMod.Enabled {
+			continue
+		}
+		s += markdown_utils.Indent(propMod.Module.Render(path)) + "\n"
+	}
+	return s
+}
+
+func (d *daoCore) Registry() *dao_interfaces.MessagesRegistry {
+	return d.registry
+}
+
+// TODO: move this helper in dao interfaces
+
+func GetProposalModule(core dao_interfaces.IDAOCore, moduleIndex int) *dao_interfaces.ActivableProposalModule {
+	if moduleIndex < 0 {
+		panic("module index must be >= 0")
+	}
+	mods := core.ProposalModules()
+	if moduleIndex >= len(mods) {
+		panic("invalid module index")
+	}
+	return &mods[moduleIndex]
+}
+
+// internal
+
+func (d *daoCore) executeMsgs(msgs []dao_interfaces.ExecutableMessage) {
+	for _, msg := range msgs {
+		d.registry.Execute(msg)
+	}
+}
+
+func (d *daoCore) addProposalModule(proposalMod dao_interfaces.IProposalModule) {
+	for _, mod := range d.proposalModules {
+		if mod.Module != proposalMod {
+			continue
+		}
+
+		if mod.Enabled {
+			panic(ErrModuleAlreadyAdded)
+		}
+		mod.Enabled = true
+		d.activeProposalModuleCount++
+		return
+	}
+
+	d.proposalModules = append(d.proposalModules, dao_interfaces.ActivableProposalModule{
+		Enabled: true,
+		Module:  proposalMod,
+	})
+
+	d.activeProposalModuleCount++
+}