Etherem Web Token
EWT bundles Ethereum function-calls into JWT-like tokens. It simplifies the use of ECDSA signatures for webapps and the development of Smart Oracles.
Installation
Install the package with npm i -S ethereum-web-token
from the npm registry ethereum-web-token
Usage
Create and Sign a Token
; let ABI = type: 'function' name: 'test' inputs: type: 'bool' type: 'string' ;let priv = '...'; ABI; 'aaaaaa.bbbbbb.cccccc'
Signed Token Example
eyJ0eXBlIjoiRVdUIiwiYWxnIjoiRVMyNTZrIn0
.eyJ0ZXN0IjpbeyJib29sIjp0cnVlfSx7InN0cmluZyI6ImpvaGJhIn1dfQ
.Xm0gkO3-jeAxsLU35g60hALU3CrIYQRFnyGv5vbdCDRlB1yABF8Qu8B9pjbIDwh7hfI_d_O5aQoZNib7WqOeLA
encodes
header: type: 'EWT' alg: 'ES256k' payload: test: bool: true string: 'johba' sig: v: 27 r: '5e6d2090edfe8de031b0b537e60eb48402d4dc2ac86104459f21afe6f6dd0834' s: '65075c80045f10bbc07da636c80f087b85f23f77f3b9690a193626fb5aa39e2c'
Parse a Token
; EWT; values: true 'string' signer: '...' //should match address of priv