Python區(qū)塊鏈塊的添加教程

更新時(shí)間：2022年05月23日 15:02:03 作者：菜鳥(niǎo)教程

這篇文章主要為大家介紹了Python區(qū)塊鏈塊的添加教程詳解，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進(jìn)步，早日升職加薪

添加第一個(gè)區(qū)塊

到添加一個(gè)新塊，我們首先創(chuàng)建一個(gè) Block 類的實(shí)例

block = Block()

我們從隊(duì)列中選取前3個(gè)交易并減去;

for?i?in?range(3):
???temp_transaction?=?transactions[last_transaction_index]
???#?validate?transaction

在將事務(wù)添加到塊之前礦工將驗(yàn)證交易的有效性.通過(guò)測(cè)試發(fā)送方提供的哈希與礦工使用發(fā)送方公鑰生成的哈希的相等性來(lái)驗(yàn)證交易有效性.此外，礦工將驗(yàn)證發(fā)件人是否有足夠的余額來(lái)支付當(dāng)前交易.

為簡(jiǎn)潔起見(jiàn)，我們未在教程中包含此功能.驗(yàn)證交易后，我們將其添加到塊實(shí)例中的 verified_transactions 列表中.

block.verified_transactions.append(temp_transaction)

我們遞增最后一個(gè)事務(wù)索引，以便下一個(gè)礦工將獲取隊(duì)列中的后續(xù)事務(wù)

last_transaction_index + = 1

我們?cè)趬K中添加了三個(gè)交易.完成此操作后，我們將初始化 Block 類的其余實(shí)例變量.我們首先添加最后一個(gè)塊的哈希值.

block.previous_block_hash = last_block_hash

接下來(lái)，我們挖掘難度等級(jí)為2的區(qū)塊.

block.Nonce = mine(block，2)

請(qǐng)注意， mine 函數(shù)的第一個(gè)參數(shù)是二進(jìn)制對(duì)象.我們現(xiàn)在對(duì)整個(gè)塊進(jìn)行哈希并在其上創(chuàng)建摘要.

digest = hash(block)

最后，我們將創(chuàng)建的塊添加到區(qū)塊鏈中，并重新初始化全局變量 last_block_hash ，以便在下一個(gè)區(qū)塊中使用.

添加塊的整個(gè)代碼顯示在下面 :

block?=?Block()
for?i?in?range(3):
???temp_transaction?=?transactions[last_transaction_index]
???#?validate?transaction
???#?if?valid
???block.verified_transactions.append?(temp_transaction)
???last_transaction_index?+=?1
block.previous_block_hash?=?last_block_hash
block.Nonce?=?mine?(block,?2)
digest?=?hash?(block)
TPCoins.append?(block)
last_block_hash?=?digest

添加更多塊

現(xiàn)在我們將向區(qū)塊鏈添加兩個(gè)塊.添加下兩個(gè)塊的代碼在下面和下面給出;

#?Miner?2?adds?a?block
block?=?Block()
for?i?in?range(3):
???temp_transaction?=?transactions[last_transaction_index]
???#?validate?transaction
???#?if?valid
???block.verified_transactions.append?(temp_transaction)
???last_transaction_index?+=?1
block.previous_block_hash?=?last_block_hash
block.Nonce?=?mine?(block,?2)digest?=?hash?(block)
TPCoins.append?(block)last_block_hash?=?digest
#?Miner?3?adds?a?block
block?=?Block()
for?i?in?range(3):
???temp_transaction?=?transactions[last_transaction_index]
???#display_transaction?(temp_transaction)
???#?validate?transaction
???#?if?valid
???block.verified_transactions.append?(temp_transaction)
???last_transaction_index?+=?1
block.previous_block_hash?=?last_block_hash
block.Nonce?=?mine?(block,?2)
digest?=?hash?(block)
TPCoins.append?(block)
last_block_hash?=?digest

當(dāng)你添加這兩個(gè)塊時(shí)，您還將看到查找Nonce所需的迭代次數(shù).此時(shí)，我們的區(qū)塊鏈共包含4個(gè)區(qū)塊，包括創(chuàng)世區(qū)塊.

轉(zhuǎn)儲(chǔ)整個(gè)區(qū)塊鏈

您可以驗(yàn)證整個(gè)區(qū)塊鏈的內(nèi)容使用以下語(yǔ)句 :

dump_blockchain(TPCoins)

你會(huì)看到輸出類似于下面顯示的那個(gè) :

Number?of?blocks?in?the?chain:?4
block?#?0
sender:?Genesis
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100ed272b52ccb539e2cd779
c6cc10ed1dfadf5d97c6ab6de90ed0372b2655626fb79f62d0e01081c163b0864cc68d426bbe943
8e8566303bb77414d4bfcaa3468ab7febac099294de10273a816f7047d4087b4bafa11f141544d4
8e2f10b842cab91faf33153900c7bf6c08c9e47a7df8aa7e60dc9e0798fb2ba3484bbdad2e44302
03010001
-----
value:?500.0
-----
time:?2019-01-14?16:18:02.042739
-----
--------------
=====================================
block?#?1
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100bb064c99c492144a9f463
480273aba93ac1db1f0da3cb9f3c1f9d058cf499fd8e54d244da0a8dd6ddd329ec86794b04d773e
b4841c9f935ea4d9ccc2821c7a1082d23b6c928d59863407f52fa05d8b47e5157f8fe56c2ce3279
c657f9c6a80500073b0be8093f748aef667c03e64f04f84d311c4d866c12d79d3fc3034563dfb02
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100be93b516b28c6e674abe7
abdb11ce0fdf5bb728b75216b73f37a6432e4b402b3ad8139b8c0ba541a72c8add126b6e1a1308f
b98b727beb63c6060356bb177bb7d54b54dbe87aee7353d0a6baa9397704de625d1836d3f42c7ee
5683f6703259592cc24b09699376807f28fe0e00ff882974484d805f874260dfc2d1627473b9102
03010001
-----
value:?15.0
-----
time:?2019-01-14?16:18:01.859915
-----
--------------
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100bb064c99c492144a9f463
480273aba93ac1db1f0da3cb9f3c1f9d058cf499fd8e54d244da0a8dd6ddd329ec86794b04d773e
b4841c9f935ea4d9ccc2821c7a1082d23b6c928d59863407f52fa05d8b47e5157f8fe56c2ce3279
c657f9c6a80500073b0be8093f748aef667c03e64f04f84d311c4d866c12d79d3fc3034563dfb02
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100a070c82b34ae143cbe59b
3a2afde7186e9d5bc274955d8112d87a00256a35369acc4d0edfe65e8f9dc93fbd9ee74b9e7ea12
334da38c8c9900e6ced1c4ce93f86e06611e656521a1eab561892b7db0961b4f212d1fd5b5e49ae
09cf8c603a068f9b723aa8a651032ff6f24e5de00387e4d062375799742a359b8f22c5362e56502
03010001
-----
value:?6.0
-----
time:?2019-01-14?16:18:01.860966
-----
--------------
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100be93b516b28c6e674abe7
abdb11ce0fdf5bb728b75216b73f37a6432e4b402b3ad8139b8c0ba541a72c8add126b6e1a1308f
b98b727beb63c6060356bb177bb7d54b54dbe87aee7353d0a6baa9397704de625d1836d3f42c7ee
5683f6703259592cc24b09699376807f28fe0e00ff882974484d805f874260dfc2d1627473b9102
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100cba097c0854876f41338c
62598c658f545182cfa4acebce147aedf328181f9c4930f14498fd03c0af6b0cce25be99452a81d
f4fa30a53eddbb7bb7b203adf8764a0ccd9db6913a576d68d642d8fd47452590137869c25d9ff83
d68ebe6d616056a8425b85b52e69715b8b85ae807b84638d8f00e321b65e4c33acaf6469e18e302
03010001
-----
value:?2.0
-----
time:?2019-01-14?16:18:01.861958
-----
--------------
=====================================
block?#?2
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100a070c82b34ae143cbe59b
3a2afde7186e9d5bc274955d8112d87a00256a35369acc4d0edfe65e8f9dc93fbd9ee74b9e7ea12
334da38c8c9900e6ced1c4ce93f86e06611e656521a1eab561892b7db0961b4f212d1fd5b5e49ae
09cf8c603a068f9b723aa8a651032ff6f24e5de00387e4d062375799742a359b8f22c5362e56502
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100be93b516b28c6e674abe7
abdb11ce0fdf5bb728b75216b73f37a6432e4b402b3ad8139b8c0ba541a72c8add126b6e1a1308f
b98b727beb63c6060356bb177bb7d54b54dbe87aee7353d0a6baa9397704de625d1836d3f42c7ee
5683f6703259592cc24b09699376807f28fe0e00ff882974484d805f874260dfc2d1627473b9102
03010001
-----
value:?4.0
-----
time:?2019-01-14?16:18:01.862946
-----
--------------
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100cba097c0854876f41338c
62598c658f545182cfa4acebce147aedf328181f9c4930f14498fd03c0af6b0cce25be99452a81d
f4fa30a53eddbb7bb7b203adf8764a0ccd9db6913a576d68d642d8fd47452590137869c25d9ff83
d68ebe6d616056a8425b85b52e69715b8b85ae807b84638d8f00e321b65e4c33acaf6469e18e302
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100a070c82b34ae143cbe59b
3a2afde7186e9d5bc274955d8112d87a00256a35369acc4d0edfe65e8f9dc93fbd9ee74b9e7ea12
334da38c8c9900e6ced1c4ce93f86e06611e656521a1eab561892b7db0961b4f212d1fd5b5e49ae
09cf8c603a068f9b723aa8a651032ff6f24e5de00387e4d062375799742a359b8f22c5362e56502
03010001
-----
value:?7.0
-----
time:?2019-01-14?16:18:01.863932
-----
--------------
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100be93b516b28c6e674abe7
abdb11ce0fdf5bb728b75216b73f37a6432e4b402b3ad8139b8c0ba541a72c8add126b6e1a1308f
b98b727beb63c6060356bb177bb7d54b54dbe87aee7353d0a6baa9397704de625d1836d3f42c7ee
5683f6703259592cc24b09699376807f28fe0e00ff882974484d805f874260dfc2d1627473b9102
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100a070c82b34ae143cbe59b
3a2afde7186e9d5bc274955d8112d87a00256a35369acc4d0edfe65e8f9dc93fbd9ee74b9e7ea12
334da38c8c9900e6ced1c4ce93f86e06611e656521a1eab561892b7db0961b4f212d1fd5b5e49ae
09cf8c603a068f9b723aa8a651032ff6f24e5de00387e4d062375799742a359b8f22c5362e56502
03010001
-----
value:?3.0
-----
time:?2019-01-14?16:18:01.865099
-----
--------------
=====================================
block?#?3
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100a070c82b34ae143cbe59b
3a2afde7186e9d5bc274955d8112d87a00256a35369acc4d0edfe65e8f9dc93fbd9ee74b9e7ea12
334da38c8c9900e6ced1c4ce93f86e06611e656521a1eab561892b7db0961b4f212d1fd5b5e49ae
09cf8c603a068f9b723aa8a651032ff6f24e5de00387e4d062375799742a359b8f22c5362e56502
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100bb064c99c492144a9f463
480273aba93ac1db1f0da3cb9f3c1f9d058cf499fd8e54d244da0a8dd6ddd329ec86794b04d773e
b4841c9f935ea4d9ccc2821c7a1082d23b6c928d59863407f52fa05d8b47e5157f8fe56c2ce3279
c657f9c6a80500073b0be8093f748aef667c03e64f04f84d311c4d866c12d79d3fc3034563dfb02
03010001
-----
value:?8.0
-----
time:?2019-01-14?16:18:01.866219
-----
--------------
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100a070c82b34ae143cbe59b
3a2afde7186e9d5bc274955d8112d87a00256a35369acc4d0edfe65e8f9dc93fbd9ee74b9e7ea12
334da38c8c9900e6ced1c4ce93f86e06611e656521a1eab561892b7db0961b4f212d1fd5b5e49ae
09cf8c603a068f9b723aa8a651032ff6f24e5de00387e4d062375799742a359b8f22c5362e56502
03010001
-----
recipient:
30819f300d06092a864886f70d010101050003818d0030818902818100be93b516b28c6e674abe7
abdb11ce0fdf5bb728b75216b73f37a6432e4b402b3ad8139b8c0ba541a72c8add126b6e1a1308f
b98b727beb63c6060356bb177bb7d54b54dbe87aee7353d0a6baa9397704de625d1836d3f42c7ee
5683f6703259592cc24b09699376807f28fe0e00ff882974484d805f874260dfc2d1627473b9102
03010001
-----
value:?1.0
-----
time:?2019-01-14?16:18:01.867223
-----
--------------
sender:
30819f300d06092a864886f70d010101050003818d0030818902818100cba097c0854876f41338c
62598c658f545182cfa4acebce147aedf328181f9c4930f14498fd03c0af6b0cce25be99452a81d
f4fa30a53eddbb7bb7b203adf8764a0ccd9db6913a576d68d642d8fd47452590137869c25d9ff83
d68ebe6d616056a8425b85b52e69715b8b85ae807b84638d8f00e321b65e4c33acaf6469e18e302
03010001
-----
recipient:?
30819f300d06092a864886f70d010101050003818d0030818902818100bb064c99c492144a9f463
480273aba93ac1db1f0da3cb9f3c1f9d058cf499fd8e54d244da0a8dd6ddd329ec86794b04d773e
b4841c9f935ea4d9ccc2821c7a1082d23b6c928d59863407f52fa05d8b47e5157f8fe56c2ce3279
c657f9c6a80500073b0be8093f748aef667c03e64f04f84d311c4d866c12d79d3fc3034563dfb02
03010001
-----
value:?5.0
-----
time:?2019-01-14?16:18:01.868241
-----
--------------
=====================================

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