BlockStore

A key-value storage space on the blockchain.

Live BlockStore

Address 0xd9889b8649E8CC758782490229eb4F7F9A1d64d9

ABI [ { "constant": false, "inputs": [ { "name": "_key", "type": "string" } ], "name": "fetch", "outputs": [ { "name": "_value", "type": "string" } ], "payable": false, "type": "function" }, { "constant": false, "inputs": [ { "name": "_key", "type": "string" }, { "name": "_value", "type": "string" } ], "name": "store", "outputs": [ { "name": "_stored_val", "type": "string" } ], "payable": false, "type": "function" }, { "inputs": [], "payable": false, "type": "constructor" } ]

To use the BlockStore

In Geth :

To access the live BlockStore

> var abi = [ { "constant": false, "inputs": [ { "name": "_key", "type": "string" } ], "name": "fetch", "outputs": [ { "name": "_value", "type": "string" } ], "payable": false, "type": "function" }, { "constant": false, "inputs": [ { "name": "_key", "type": "string" }, { "name": "_value", "type": "string" } ], "name": "store", "outputs": [ { "name": "_stored_val", "type": "string" } ], "payable": false, "type": "function" }, { "inputs": [], "payable": false, "type": "constructor" } ];         
> var address = '0xd9889b8649E8CC758782490229eb4F7F9A1d64d9';       
> var blockStore = eth.contract(abi).at(address);    

To store a value

> blockStore.store( 'my_variable_name', 'my variable value' )

Use mist - I can't figure out how to call the store method succesfully using geth.

To retrieve a value

> blockStore.fetch.call( 'my_variable_name' )

State of the Daaps

Block Store is listed on the State of the Dapps website :

• https://dapps.ethercasts.com/dapp/block-store

Other Notes

Here are some of my working notes from start to finish creating an ethereum solidity smart contract :

• Getting started with Ethereum and writing Smart Contracts
• Getting a Contract onto the live Ethereum blockchain.
• Other handy geth commands