initial addition of essential crypto, encoders, workflows and LLM instructions

pkg/crypto/ec/wire/blockheader.go

@@ -0,0 +1,25 @@
+package wire
+
+import (
+	"time"
+
+	"next.orly.dev/pkg/crypto/ec/chainhash"
+)
+
+// BlockHeader defines information about a block and is used in the bitcoin
+// block (MsgBlock) and headers (MsgHeaders) messages.
+type BlockHeader struct {
+	// Version of the block.  This is not the same as the protocol version.
+	Version int32
+	// Hash of the previous block header in the block chain.
+	PrevBlock chainhash.Hash
+	// Merkle tree reference to hash of all transactions for the block.
+	MerkleRoot chainhash.Hash
+	// Time the block was created.  This is, unfortunately, encoded as a
+	// uint32 on the wire and therefore is limited to 2106.
+	Timestamp time.Time
+	// Difficulty target for the block.
+	Bits uint32
+	// Nonce used to generate the block.
+	Nonce uint32
+}