Fix requested block ahead of current block check

PlasmaPower · PlasmaPower · commit ce75c202010f · 2024-05-01T11:21:06.000-05:00
diff --git a/arbitrum/apibackend.go b/arbitrum/apibackend.go
@@ -535,7 +535,7 @@ func (a *APIBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOr
 	hash, ishash := blockNrOrHash.Hash()
 	bc := a.BlockChain()
 	// check if we are not trying to get recent state that is not yet triedb referenced or committed in Blockchain.writeBlockWithState
-	if ishash && header.Number.Cmp(bc.CurrentBlock().Number) > 0 && bc.GetCanonicalHash(header.Number.Uint64()) != hash {
+	if ishash && header != nil && header.Number.Cmp(bc.CurrentBlock().Number) > 0 && bc.GetCanonicalHash(header.Number.Uint64()) != hash {
 		return nil, nil, errors.New("requested block ahead of current block and the hash is not currently canonical")
 	}
 	return a.stateAndHeaderFromHeader(ctx, header, err)

Original file line number	Diff line number	Diff line change
`@@ -535,7 +535,7 @@ func (a *APIBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOr`
`535`	`535`	`hash, ishash := blockNrOrHash.Hash()`
`536`	`536`	`bc := a.BlockChain()`
`537`	`537`	`// check if we are not trying to get recent state that is not yet triedb referenced or committed in Blockchain.writeBlockWithState`
`538`		`- if ishash && header.Number.Cmp(bc.CurrentBlock().Number) > 0 && bc.GetCanonicalHash(header.Number.Uint64()) != hash {`
	`538`	`+ if ishash && header != nil && header.Number.Cmp(bc.CurrentBlock().Number) > 0 && bc.GetCanonicalHash(header.Number.Uint64()) != hash {`
`539`	`539`	`return nil, nil, errors.New("requested block ahead of current block and the hash is not currently canonical")`
`540`	`540`	`}`
`541`	`541`	`return a.stateAndHeaderFromHeader(ctx, header, err)`