Merge pull request #17622 from karalabe/chain-maker-seal

consensus/clique, core: chain maker clique + error tests

core/chain_makers.go

@@ -67,6 +67,11 @@ func (b *BlockGen) SetExtra(data []byte) {
 	b.header.Extra = data
 }
 
+// SetNonce sets the nonce field of the generated block.
+func (b *BlockGen) SetNonce(nonce types.BlockNonce) {
+	b.header.Nonce = nonce
+}
+
 // AddTx adds a transaction to the generated block. If no coinbase has
 // been set, the block's coinbase is set to the zero address.
 //
@@ -190,13 +195,14 @@ func GenerateChain(config *params.ChainConfig, parent *types.Block, engine conse
 		if config.DAOForkSupport && config.DAOForkBlock != nil && config.DAOForkBlock.Cmp(b.header.Number) == 0 {
 			misc.ApplyDAOHardFork(statedb)
 		}
-		// Execute any user modifications to the block and finalize it
+		// Execute any user modifications to the block
 		if gen != nil {
 			gen(i, b)
 		}
-
 		if b.engine != nil {
+			// Finalize and seal the block
 			block, _ := b.engine.Finalize(b.chainReader, b.header, statedb, b.txs, b.uncles, b.receipts)
+
 			// Write state changes to db
 			root, err := statedb.Commit(config.IsEIP158(b.header.Number))
 			if err != nil {