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game_builder.go
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game_builder.go
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package test
import (
"math/big"
"testing"
"github.com/ethereum-optimism/optimism/op-challenger/game/fault/types"
"github.com/ethereum/go-ethereum/common"
)
type GameBuilder struct {
builder *ClaimBuilder
Game types.Game
ExpectedActions []types.Action
}
func NewGameBuilderFromGame(t *testing.T, provider types.TraceProvider, game types.Game) *GameBuilder {
claimBuilder := NewClaimBuilder(t, game.MaxDepth(), provider)
return &GameBuilder{
builder: claimBuilder,
Game: types.NewGameState(game.Claims(), game.MaxDepth()),
}
}
func (c *ClaimBuilder) GameBuilder(rootOpts ...ClaimOpt) *GameBuilder {
return &GameBuilder{
builder: c,
Game: types.NewGameState([]types.Claim{c.CreateRootClaim(rootOpts...)}, c.maxDepth),
}
}
type GameBuilderSeq struct {
gameBuilder *GameBuilder
builder *ClaimBuilder
lastClaim types.Claim
}
func (g *GameBuilder) Seq() *GameBuilderSeq {
return g.SeqFrom(g.Game.Claims()[0])
}
func (g *GameBuilder) SeqFrom(claim types.Claim) *GameBuilderSeq {
return &GameBuilderSeq{
gameBuilder: g,
builder: g.builder,
lastClaim: claim,
}
}
func (g *GameBuilderSeq) IsMaxDepth() bool {
return g.lastClaim.Depth() == g.gameBuilder.Game.MaxDepth()
}
func (g *GameBuilderSeq) IsRoot() bool {
return g.lastClaim.IsRoot()
}
// addClaimToGame replaces the game being built with a new instance that has claim as the latest claim.
// The ContractIndex in claim is updated with its position in the game's claim array.
// Does nothing if the claim already exists
func (s *GameBuilderSeq) addClaimToGame(claim *types.Claim) {
if s.gameBuilder.Game.IsDuplicate(*claim) {
return
}
claim.ContractIndex = len(s.gameBuilder.Game.Claims())
claims := append(s.gameBuilder.Game.Claims(), *claim)
s.gameBuilder.Game = types.NewGameState(claims, s.builder.maxDepth)
}
func (s *GameBuilderSeq) Attack(opts ...ClaimOpt) *GameBuilderSeq {
claim := s.builder.AttackClaim(s.lastClaim, opts...)
s.addClaimToGame(&claim)
return &GameBuilderSeq{
gameBuilder: s.gameBuilder,
builder: s.builder,
lastClaim: claim,
}
}
func (s *GameBuilderSeq) Defend(opts ...ClaimOpt) *GameBuilderSeq {
claim := s.builder.DefendClaim(s.lastClaim, opts...)
s.addClaimToGame(&claim)
return &GameBuilderSeq{
gameBuilder: s.gameBuilder,
builder: s.builder,
lastClaim: claim,
}
}
func (s *GameBuilderSeq) Step(opts ...ClaimOpt) {
cfg := newClaimCfg(opts...)
claimant := DefaultClaimant
if cfg.claimant != (common.Address{}) {
claimant = cfg.claimant
}
claims := s.gameBuilder.Game.Claims()
claims[len(claims)-1].CounteredBy = claimant
s.gameBuilder.Game = types.NewGameState(claims, s.builder.maxDepth)
}
func (s *GameBuilderSeq) ExpectAttack() *GameBuilderSeq {
newPos := s.lastClaim.Position.Attack()
value := s.builder.CorrectClaimAtPosition(newPos)
s.gameBuilder.ExpectedActions = append(s.gameBuilder.ExpectedActions, types.Action{
Type: types.ActionTypeMove,
ParentIdx: s.lastClaim.ContractIndex,
ParentPosition: s.lastClaim.Position,
IsAttack: true,
Value: value,
})
return s
}
func (s *GameBuilderSeq) ExpectDefend() *GameBuilderSeq {
newPos := s.lastClaim.Position.Defend()
value := s.builder.CorrectClaimAtPosition(newPos)
s.gameBuilder.ExpectedActions = append(s.gameBuilder.ExpectedActions, types.Action{
Type: types.ActionTypeMove,
ParentIdx: s.lastClaim.ContractIndex,
ParentPosition: s.lastClaim.Position,
IsAttack: false,
Value: value,
})
return s
}
func (s *GameBuilderSeq) ExpectStepAttack() *GameBuilderSeq {
traceIdx := s.lastClaim.TraceIndex(s.builder.maxDepth)
s.gameBuilder.ExpectedActions = append(s.gameBuilder.ExpectedActions, types.Action{
Type: types.ActionTypeStep,
ParentIdx: s.lastClaim.ContractIndex,
ParentPosition: s.lastClaim.Position,
IsAttack: true,
PreState: s.builder.CorrectPreState(traceIdx),
ProofData: s.builder.CorrectProofData(traceIdx),
OracleData: s.builder.CorrectOracleData(traceIdx),
})
return s
}
func (s *GameBuilderSeq) ExpectStepDefend() *GameBuilderSeq {
traceIdx := new(big.Int).Add(s.lastClaim.TraceIndex(s.builder.maxDepth), big.NewInt(1))
s.gameBuilder.ExpectedActions = append(s.gameBuilder.ExpectedActions, types.Action{
Type: types.ActionTypeStep,
ParentIdx: s.lastClaim.ContractIndex,
ParentPosition: s.lastClaim.Position,
IsAttack: false,
PreState: s.builder.CorrectPreState(traceIdx),
ProofData: s.builder.CorrectProofData(traceIdx),
OracleData: s.builder.CorrectOracleData(traceIdx),
})
return s
}