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Craft Extrinsic
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Transfer DOTs
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<!-- Title -->
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<h1>
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<a href="../.." >Transfer DOTs</a>
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<h1 id="tranfer-dots">Tranfer DOTs</h1>
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<p>This sample is more 'straight to the point' and shows the easiest way to transfer DOTs from an account to another.</p>
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<pre><code class="lang-javascript"><span class="hljs-keyword">const</span> Api = <span class="hljs-built_in">require</span>(<span class="hljs-string">'@polkadot/api'</span>).default
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<span class="hljs-keyword">const</span> WsProvider = <span class="hljs-built_in">require</span>(<span class="hljs-string">'@polkadot/api-provider/ws'</span>).default
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<span class="hljs-keyword">const</span> extrinsics = <span class="hljs-built_in">require</span>(<span class="hljs-string">'@polkadot/extrinsics'</span>).default
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<span class="hljs-keyword">const</span> encodeExtrinsic = <span class="hljs-built_in">require</span>(<span class="hljs-string">'@polkadot/extrinsics/codec/encode/uncheckedLength'</span>).default
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<span class="hljs-keyword">const</span> encodeLength = <span class="hljs-built_in">require</span>(<span class="hljs-string">'@polkadot/extrinsics/codec/encode/length'</span>).default
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<span class="hljs-keyword">const</span> Keyring = <span class="hljs-built_in">require</span>(<span class="hljs-string">'@polkadot/util-keyring'</span>).default
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<span class="hljs-keyword">const</span> storage = <span class="hljs-built_in">require</span>(<span class="hljs-string">'@polkadot/storage'</span>).default
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<span class="hljs-keyword">const</span> BN = <span class="hljs-built_in">require</span>(<span class="hljs-string">'bn.js'</span>)
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<span class="hljs-keyword">const</span> Encoder = <span class="hljs-keyword">new</span> TextEncoder()
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<span class="hljs-keyword">const</span> keyring = <span class="hljs-keyword">new</span> Keyring()
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<span class="hljs-keyword">const</span> provider = <span class="hljs-keyword">new</span> WsProvider(<span class="hljs-string">'ws://127.0.0.1:9944'</span>)
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<span class="hljs-keyword">const</span> api = <span class="hljs-keyword">new</span> Api(provider)
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<span class="hljs-keyword">async</span> <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">getAccountIndex</span> (<span class="hljs-params">address</span>) </span>{
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<span class="hljs-keyword">return</span> api.state.getStorage([storage.system.public.accountIndexOf, address])
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}
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<span class="hljs-keyword">async</span> <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">transfer</span> (<span class="hljs-params">keyRingFrom, addressTo, amount</span>) </span>{
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<span class="hljs-keyword">const</span> nextAccountIndex = <span class="hljs-keyword">await</span> getAccountIndex(keyRingFrom.address())
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<span class="hljs-comment">// encode the call for signing</span>
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<span class="hljs-keyword">const</span> encoded = encodeExtrinsic(
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keyRingFrom,
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nextAccountIndex,
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extrinsics.staking.public.transfer,
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[addressTo, amount]
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)
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<span class="hljs-keyword">await</span> api.author.submitExtrinsic(encoded)
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.catch(e => <span class="hljs-built_in">console</span>.log)
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}
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<span class="hljs-keyword">const</span> Alice = keyring.addFromSeed(Encoder.encode(<span class="hljs-string">'Alice '</span>))
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<span class="hljs-keyword">const</span> addressBob = <span class="hljs-string">'5Gw3s7q4QLkSWwknsiPtjujPv3XM4Trxi5d4PgKMMk3gfGTE'</span>
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<span class="hljs-keyword">const</span> amount = <span class="hljs-keyword">new</span> BN(<span class="hljs-number">999</span>) <span class="hljs-comment">// on dev chain, the fee is 1, that makes it a round 1000</span>
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<span class="hljs-built_in">console</span>.log(<span class="hljs-string">`Crafting and sending an extrinsic for Alice to send Bob <span class="hljs-subst">${amount}</span> DOTs`</span>)
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transfer(Alice, addressBob, amount)
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.then(() => <span class="hljs-built_in">console</span>.log(<span class="hljs-string">'Done'</span>))
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.catch((e) => <span class="hljs-built_in">console</span>.log(e))
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.finally(_ => process.exit(<span class="hljs-number">0</span>))
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</code></pre>
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