Merge pull request #102 from SkypLabs/bitcoin_transaction

Add bitcoin transaction

network/bitcoin_transaction.ksy

@@ -0,0 +1,149 @@
+meta:
+  id: bitcoin_transaction
+  title: Bitcoin Transaction
+  license: CC-BY-SA-4.0
+  endian: le
+doc-ref: |
+  https://bitcoin.org/en/developer-guide#transactions
+  https://en.bitcoin.it/wiki/Transaction
+seq:
+  - id: version
+    type: u4
+    doc: |
+      Version number.
+  - id: num_vins
+    type: u1
+    doc: |
+      Number of input transactions.
+  - id: vins
+    type: vin
+    repeat: expr
+    repeat-expr: num_vins
+    doc: |
+      Input transactions.
+      An input refers to an output from a previous transaction.
+  - id: num_vouts
+    type: u1
+    doc: |
+      Number of output transactions.
+  - id: vouts
+    type: vout
+    repeat: expr
+    repeat-expr: num_vouts
+    doc: |
+      Output transactions.
+  - id: locktime
+    type: u4
+types:
+  vin:
+    seq:
+      - id: txid
+        size: 32
+        doc: |
+          Previous transaction hash.
+      - id: output_id
+        type: u4
+        doc: |
+          ID indexing an ouput of the transaction refered by txid.
+          This output will be used as an input in the present transaction.
+      - id: script_len
+        type: u1
+        doc: |
+          ScriptSig's length.
+      - id: script_sig
+        size: script_len
+        type: script_signature
+        doc: |
+          ScriptSig.
+        doc-ref: |
+          https://en.bitcoin.it/wiki/Transaction#Input
+          https://en.bitcoin.it/wiki/Script
+      - id: end_of_vin
+        contents: [0xff, 0xff, 0xff, 0xff]
+        doc: |
+          Magic number indicating the end of the current input.
+  vout:
+    seq:
+      - id: amount
+        type: u8
+        doc: |
+          Number of Satoshis to be transfered.
+      - id: script_len
+        type: u1
+        doc: |
+          ScriptPubKey's length.
+      - id: script_pub_key
+        size: script_len
+        doc: |
+          ScriptPubKey.
+        doc-ref: |
+          https://en.bitcoin.it/wiki/Transaction#Output
+          https://en.bitcoin.it/wiki/Script
+  script_signature:
+    seq:
+      - id: sig_stack_len
+        type: u1
+      - id: der_sig
+        type: der_signature
+        doc: |
+          DER-encoded ECDSA signature.
+        doc-ref: |
+          https://en.wikipedia.org/wiki/X.690#DER_encoding
+          https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm
+      - id: sig_type
+        type: u1
+        enum: sighash_type
+        doc: |
+          Type of signature.
+      - id: pubkey_stack_len
+        type: u1
+      - id: pubkey
+        type: public_key
+        doc: |
+          Public key (bitcoin address of the recipient).
+  der_signature:
+    seq:
+      - id: sequence
+        contents: [0x30]
+      - id: sig_len
+        type: u1
+      - id: sep_1
+        contents: [0x02]
+      - id: sig_r_len
+        type: u1
+        doc: |
+          'r' value's length.
+      - id: sig_r
+        size: sig_r_len
+        doc: |
+          'r' value of the ECDSA signature.
+        doc-ref: 'https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm'
+      - id: sep_2
+        contents: [0x02]
+      - id: sig_s_len
+        type: u1
+        doc: |
+          's' value's length.
+      - id: sig_s
+        size: sig_s_len
+        doc: |
+          's' value of the ECDSA signature.
+        doc-ref: 'https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm'
+  public_key:
+    seq:
+      - id: type
+        type: u1
+      - id: x
+        size: 32
+        doc: |
+          'x' coordinate of the public key on the elliptic curve.
+      - id: y
+        size: 32
+        doc: |
+          'y' coordinate of the public key on the elliptic curve.
+enums:
+  sighash_type:
+    1: sighash_all
+    2: sighash_none
+    3: sighash_single
+    80: sighash_anyonecanpay