From 54d860b0d4d36e147ad1b380b3a0cb0aecc591fa Mon Sep 17 00:00:00 2001
From: Hugo Trentesaux <hugo@trentesaux.fr>
Date: Sun, 15 Nov 2020 16:36:08 +0100
Subject: [PATCH] [ref] access target block from json
---
duniterpy/helpers/blockchain.py | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/duniterpy/helpers/blockchain.py b/duniterpy/helpers/blockchain.py
index 0e4e1090..46f4fdee 100644
--- a/duniterpy/helpers/blockchain.py
+++ b/duniterpy/helpers/blockchain.py
@@ -77,6 +77,18 @@ class JsonBlockchain:
self.current_block_in_chunk - 1
] # return block (before incrementation)
+ def current_block(self):
+ """returns current block as a duniterpy block document"""
+ json_block = self.chunk[self.current_block_in_chunk]
+ return Block.from_parsed_json(json_block)
+
+ def get_block_number(self, number):
+ """get one precise block (do not use for iteration)"""
+ self.current_chunk = number // CHUNK_SIZE
+ self.current_block_in_chunk = number % CHUNK_SIZE
+ self.parsechunk()
+ return self.current_block()
+
def Blockchain(json_blockchain):
"""convert json to duniterpy block document"""
@@ -85,10 +97,16 @@ def Blockchain(json_blockchain):
yield Block.from_parsed_json(jb)
+def load_json(path=DEFAULT_PATH):
+ """returns a JsonBlockchain object"""
+ path = pathlib.Path("~").joinpath(path).expanduser() # expand path
+ jbc = JsonBlockchain(path) # gets an iterator over json blockchain
+ return jbc
+
+
def load(path=DEFAULT_PATH):
"""returns an iterator allowing to browse all the blockchain
in practice, it will load chunk by chunk and only keep one in memory at a time"""
- path = pathlib.Path("~").joinpath(path).expanduser() # expand path
- jbc = JsonBlockchain(path) # gets an iterator over json blockchain
+ jbc = load_json(path)
bc = Blockchain(jbc) # convert it to an iterator over blocks
return bc # returns
--
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