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Nano Address Stamps
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Nano Stamp</title> | |
| <style> | |
| img { | |
| image-rendering: pixelated; | |
| border: 1px solid black; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <img id="main" width="135" height="135" /> | |
| <img id="four" width="36" height="36" /> | |
| <img id="two" width="18" height="18" /> | |
| <img id="original" width="9" height="9" /> | |
| <div> | |
| <input type="text" id="address" /> | |
| </div> | |
| <div style="margin-top: 15px; font-family: sans-serif;"> | |
| <span id="presented"></span> | |
| <img id="presented-img" width="27", height="27" /> | |
| </div> | |
| <div> | |
| <p>Examples:</p> | |
| <dl> | |
| <dd> | |
| <a href="javascript:fillAddress('nano_3ntf6crkan6114rfb39d51udqdw4mrbt1x7n8uphx44ojhxcjo3exhk6dsme')">Spark</a> | |
| </dd> | |
| <dd> | |
| <a href="javascript:fillAddress('nano_1ookerz3adg5rxc4zwwoshim5yyyihf6dpogjihwwq6ksjpq7ea4fuam5mmc')">NanoLooker</a> | |
| </dd> | |
| <dd> | |
| <a href="javascript:fillAddress('nano_3n7ky76t4g57o9skjawm8pprooz1bminkbeegsyt694xn6d31c6s744fjzzz')">HumbleNano.io</a> | |
| </dd> | |
| <dd> | |
| <a href="javascript:fillAddress('nano_3msc38fyn67pgio16dj586pdrceahtn75qgnx7fy19wscixrc8dbb3abhbw6')">Gr0vity</a> | |
| </dd> | |
| <dd> | |
| <a href="javascript:fillAddress('nano_1b9wguhh39at8qtm93oghd6r4f4ubk7zmqc9oi5ape6yyz4s1gamuwn3jjit')">Trustable - NN1</a> | |
| </dd> | |
| <dd> | |
| <a href="javascript:fillAddress('nano_1j78msn5omp8jrjge8txwxm4x3smusa1cojg7nuk8fdzoux41fqeeogg5aa1')">NanoBrasil</a> | |
| </dd> | |
| </dl> | |
| </div> | |
| <script src="nano_stamp.js"></script> | |
| <script> | |
| const addrInput = document.getElementById('address'); | |
| const main = document.getElementById('main'); | |
| const four = document.getElementById('four'); | |
| const two = document.getElementById('two'); | |
| const original = document.getElementById('original'); | |
| const presented = document.getElementById('presented'); | |
| const presentedImg = document.getElementById('presented-img'); | |
| const draw = () => { | |
| generateStamp(addrInput.value) | |
| .then(stamp => { | |
| main.src = stamp; | |
| four.src = stamp; | |
| two.src = stamp; | |
| original.src = stamp; | |
| presented.innerText = addrInput.value; | |
| presentedImg.src = stamp; | |
| }); | |
| } | |
| addrInput.addEventListener('blur', draw); | |
| function fillAddress(str) { | |
| addrInput.value = str; | |
| draw(); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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| const generateStamp = (function(){ | |
| function generate(address) { | |
| return new Promise((resolve, reject) => { | |
| truncated = address.replace(/^(?:nano_|xrb_)/, ''); | |
| if (truncated.length != 60) { | |
| reject("Invalid address!"); | |
| return; | |
| } | |
| sequence = normalize(truncated) | |
| rgb = sequence.splice(-3); | |
| extra = sequence.splice(-8); | |
| points = sequence.map((p, i) => ({ | |
| color: particle(rgb, p), | |
| x: i % 7 + 1, | |
| y: Math.floor(i / 7) + 1, | |
| })); | |
| [0, 7, 14, 21, 28, 35, 42, 48].forEach((v, i) => { | |
| points[v].color = points[v].color.map((c, j) => j <= 0 ? c * extra[i] : c); | |
| }); | |
| const buffer = document.createElement("canvas"); | |
| buffer.width = 135; | |
| buffer.height = 135; | |
| const ctx = buffer.getContext('2d'); | |
| ctx.scale(15, 15); | |
| ctx.fillStyle = '#fbfbfc'; | |
| ctx.fillRect(0, 0, 9, 9); | |
| ctx.imageSmoothingEnabled = false; | |
| points.push(...drawX(extra[7])); | |
| for (point of points) { | |
| ctx.fillStyle = `rgba(${point.color[0]}, ${point.color[1]}, ${point.color[2]}, ${point.color[3] || 1})`; | |
| ctx.fillRect(point.x, point.y, 1, 1); | |
| } | |
| resolve(buffer.toDataURL("image/png")); | |
| }); | |
| } | |
| function normalize(str) { | |
| return str.split('').map(c => Math.ceil(((n = c.charCodeAt(0) - 96) > 0 ? n + 9 : n + 48) / 35 * 255) / 255) | |
| } | |
| function particle(rgb, value) { | |
| return rgb.map(c => Math.ceil(((1 - c) * value + c) * 255)); | |
| } | |
| function drawX(value) { | |
| const index = Math.floor(value * 49); | |
| const center = { | |
| x: index % 7 + 1, | |
| y: Math.floor(index / 7) + 1, | |
| }; | |
| const color = [0, 0, 0, .9]; | |
| const points = [[-2,-3],[2,-3],[-1,-2],[1,-2],[0,-1],[-1,0],[0,0],[1,0],[0,1],[-1,2],[1,2],[-2,3],[2,3]]; | |
| return points.map(p => ({ | |
| color: color, | |
| x: p[0] + center.x, | |
| y: p[1] + center.y, | |
| })); | |
| } | |
| return generate; | |
| })(); |
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