Feat/block header 1

docs/predicate/asserta_1.md

@@ -54,9 +54,9 @@ answer:
   results:
   - substitutions:
     - variable: X
-      expression: "john"
-    - variable: Y
-      expression: "pete"
+      expression: john
+    - variable: 'Y'
+      expression: pete
 ```
 
 ### Only dynamic predicates can be asserted
@@ -127,10 +127,10 @@ answer:
   results:
   - substitutions:
     - variable: X
-      expression: "john"
+      expression: john
   - substitutions:
     - variable: X
-      expression: "jane"
+      expression: jane
 ```
 
 ### Shows a simple counter example

docs/predicate/assertz_1.md

@@ -54,9 +54,9 @@ answer:
   results:
   - substitutions:
     - variable: X
-      expression: "john"
-    - variable: Y
-      expression: "pete"
+      expression: john
+    - variable: 'Y'
+      expression: pete
 ```
 
 ### Only dynamic predicates can be asserted
@@ -127,10 +127,10 @@ answer:
   results:
   - substitutions:
     - variable: X
-      expression: "jane"
+      expression: jane
   - substitutions:
     - variable: X
-      expression: "john"
+      expression: john
 ```
 
 ### Add and remove items in an inventory

docs/predicate/block_header_1.md

@@ -0,0 +1,189 @@
+---
+sidebar_position: 10
+---
+[//]: # (This file is auto-generated. Please do not modify it yourself.)
+
+# block_header/1
+
+## Description
+
+`block_header/1` is a predicate which unifies the given term with the current block header.
+
+## Signature
+
+```text
+block_header(?Header) is det
+```
+
+where:
+
+- Header is a Dict representing the current chain header at the time of the query.
+
+## Examples
+
+### Retrieve the header of the current block
+
+This scenario demonstrates how to retrieve the header of the current block and obtain some of its properties.
+
+The header of a block carries important information about the state of the blockchain, such as basic information (chain id, the height,
+time, and height), the information about the last block, hashes, and the consensus info.
+
+The header is represented as a Prolog Dict, which is a collection of key-value pairs.
+
+Here are the steps of the scenario:
+
+- **Given** a block with the following header:
+
+```  yaml
+app_hash: Q0P6b2hoSUbmpCE6o6Dme4H4FBWqdcpqo89DrpBYSHQ=
+chain_id: axone-localnet
+height: 33
+next_validators_hash: EIQFMnCDepfXD2e3OeL1QoEfmu6BZQbKR500Wkl4gK0=
+proposer_address: yz7PSKMWniQlQWMd7LskBABgDKQ=
+time: "2024-11-22T21:22:04.676789Z"
+```
+
+- **Given** the query:
+
+```  prolog
+block_header(Header).
+```
+
+- **When** the query is run
+- **Then** the answer we get is:
+
+```  yaml
+height: 33
+gas_used: 3975
+answer:
+  has_more: false
+  variables: ["Header"]
+  results:
+  - substitutions:
+    - variable: Header
+      expression: >-
+        header{app_hash:[67,67,250,111,104,104,73,70,230,164,33,58,163,160,230,123,129,248,20,21,170,117,202,106,163,207,67,174,144,88,72,116],chain_id:'axone-localnet',consensus_hash:[],data_hash:[],evidence_hash:[],height:33,last_block_id:block_id{hash:[],part_set_header:part_set_header{hash:[],total:0}},last_commit_hash:[],last_results_hash:[],next_validators_hash:[16,132,5,50,112,131,122,151,215,15,103,183,57,226,245,66,129,31,154,238,129,101,6,202,71,157,52,90,73,120,128,173],proposer_address:[203,62,207,72,163,22,158,36,37,65,99,29,236,187,36,4,0,96,12,164],time:1732310524,validators_hash:[],version:consensus{app:0,block:0}}
+```
+
+### Retrieve the block height of the current block
+
+This scenario demonstrates how to retrieve the block height of the current block.
+
+Here are the steps of the scenario:
+
+- **Given** a block with the following header:
+
+```  yaml
+height: 100
+```
+
+- **Given** the program:
+
+```  prolog
+height(Height) :-
+    block_header(Header),
+    Height = Header.height.
+```
+
+- **Given** the query:
+
+```  prolog
+height(Height).
+```
+
+- **When** the query is run
+- **Then** the answer we get is:
+
+```  yaml
+height: 100
+gas_used: 3978
+answer:
+  has_more: false
+  variables: ["Height"]
+  results:
+  - substitutions:
+    - variable: Height
+      expression: "100"
+```
+
+### Retrieve the block time of the current block
+
+This scenario demonstrates how to retrieve the block time of the current block.
+
+Here are the steps of the scenario:
+
+- **Given** a block with the following header:
+
+```  yaml
+time: 2024-03-04T11:03:36.000Z
+```
+
+- **Given** the program:
+
+```  prolog
+time(Time) :-
+    block_header(Header),
+    Time = Header.time.
+```
+
+- **Given** the query:
+
+```  prolog
+time(Time).
+```
+
+- **When** the query is run
+- **Then** the answer we get is:
+
+```  yaml
+height: 42
+gas_used: 3978
+answer:
+  has_more: false
+  variables: ["Time"]
+  results:
+  - substitutions:
+    - variable: Time
+      expression: "1709550216"
+```
+
+### Evaluate a condition based on block time and height
+
+This scenario demonstrates how to evaluate a condition that depends on both the block time and block height.
+Specifically, it checks whether the block time is greater than 1709550216 seconds (Monday 4 March 2024 11:03:36 GMT)
+or the block height is greater than 42.
+
+Here are the steps of the scenario:
+
+- **Given** a block with the following header:
+
+```  yaml
+time: 2024-03-04T11:03:37.000Z
+```
+
+- **Given** the program:
+
+```  prolog
+evaluate :-
+    block_header(Header),
+    (Header.time > 1709550216; Header.height > 42),
+    !.
+```
+
+- **Given** the query:
+
+```  prolog
+evaluate.
+```
+
+- **When** the query is run
+- **Then** the answer we get is:
+
+```  yaml
+height: 42
+gas_used: 3981
+answer:
+  has_more: false
+  results:
+  - substitutions:
+```

docs/predicate/block_height_1.md

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 10
+sidebar_position: 11
 ---
 [//]: # (This file is auto-generated. Please do not modify it yourself.)
 
@@ -19,72 +19,4 @@ where:
 
 - Height represents the current chain height at the time of the query.
 
-## Examples
-
-### Retrieve the block height of the current block
-
-This scenario demonstrates how to retrieve the block height of the current block.
-
-Here are the steps of the scenario:
-
-- **Given** a block with the following header:
-
-| key | value |
-| --- | ----- |
-| Height | 100 |
-
-- **Given** the query:
-
-```  prolog
-block_height(Height).
-```
-
-- **When** the query is run
-- **Then** the answer we get is:
-
-```  yaml
-height: 100
-gas_used: 3975
-answer:
-  has_more: false
-  variables: ["Height"]
-  results:
-  - substitutions:
-    - variable: Height
-      expression: "100"
-```
-
-### Check that the block height is greater than a certain value
-
-This scenario demonstrates how to check that the block height is greater than 100. This predicate is useful for
-governance which requires a certain block height to be reached before a certain action is taken.
-
-Here are the steps of the scenario:
-
-- **Given** a block with the following header:
-
-| key | value |
-| --- | ----- |
-| Height | 101 |
-
-- **Given** the query:
-
-```  prolog
-block_height(Height),
-Height > 100.
-```
-
-- **When** the query is run
-- **Then** the answer we get is:
-
-```  yaml
-height: 101
-gas_used: 3976
-answer:
-  has_more: false
-  variables: ["Height"]
-  results:
-  - substitutions:
-    - variable: Height
-      expression: "101"
-```
+Deprecated: Use the \`block\_header/1\` predicate instead.