How to use @polkadot/extrinsics - 10 common examples
To help you get started, we’ve selected a few @polkadot/extrinsics examples, based on popular ways it is used in public projects.
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polkadot-js / api / packages / type-primitives / src / codec / block / encode.spec.js View on Github 
it('encodes a block correctly (actual values)', () => {
expect(
encodeBlock(
blockBuilder({
header: {
number: 9,
parentHash: hexToU8a('0x737d699e4e42f78dc2fb098f01bb85389f2c7f0a77bb41918adac6bfa5b3ee46'),
stateRoot: hexToU8a('0xf707774183723f201b875024069f30e7089b7f83c3c3cdc534b10d15fca91262')
},
extrinsics: [
encodeUnchecked
(keyring.nobody, 0,
extrinsics.timestamp.public.set,
[0x5b13c3a4]
),
encodeUnchecked(
keyring.nobody, 0,
extrinsics.parachains.public.setHeads,
[[]]
)
]
})
)
).toEqual(
new Uint8Array([
115, 125, 105, 158, 78, 66, 247, 141, 194, 251, 9, 143, 1, 187, 133, 56, 159, 44, 127, 10, 119, 187, 65, 145, 138, 218, 198, 191, 165, 179, 238, 70, 9, 0, 0, 0, 0, 0, 0, 0, 247, 7, 119, 65, 131, 114, 63, 32, 27, 135, 80, 36, 6, 159, 48, 231, 8, 155, 127, 131, 195, 195, 205, 197, 52, 177, 13, 21, 252, 169, 18, 98, 140, 102, 133, 98, 214, 123, 73, 173, 122, 252, 247, 48, 181, 86, 77, 188, 213, 161, 17, 19, 73, 96, 158, 181, 249, 69, 97, 15, 186, 12, 45, 157, 0, 0, 0, 0, 2, 0, 0, 0, 111, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 164, 195, 19, 91, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 107, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
])
// hexToU8a(
// '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'
// )
);
});it('calculates the root correctly (actual)', () => {
expect(
root([
encodeUnchecked(
keyring.nobody, 0,
extrinsics.timestamp.public.set,
[0x5b13c3a4]
),
encodeUnchecked(
keyring.nobody, 0,
extrinsics.parachains.public.setHeads,
[[]]
)
])
).toEqual(
new Uint8Array([
140, 102, 133, 98, 214, 123, 73, 173, 122, 252, 247, 48, 181, 86, 77, 188, 213, 161, 17, 19, 73, 96, 158, 181, 249, 69, 97, 15, 186, 12, 45, 157
])
// hexToU8a(
// '0xab602f7974bbfb513f021f39777e2195094dc64a2c1b7c82a1781cb9fd4768a8'it('calculates the root correctly (actual)', () => {
expect(
root([
encodeUnchecked(keyring.nobody, 0)(
extrinsics.timestamp.public.set,
[0x5b13c3a4]
),
encodeUnchecked(keyring.nobody, 0)(
extrinsics.parachains.public.setHeads,
[[]]
)
])
).toEqual(
new Uint8Array([
140, 102, 133, 98, 214, 123, 73, 173, 122, 252, 247, 48, 181, 86, 77, 188, 213, 161, 17, 19, 73, 96, 158, 181, 249, 69, 97, 15, 186, 12, 45, 157
])
// hexToU8a(
// '0xab602f7974bbfb513f021f39777e2195094dc64a2c1b7c82a1781cb9fd4768a8'
// )
);it('calculates the root correctly (actual)', () => {
expect(
root([
encodeUnchecked(keyring.nobody, 0)(
extrinsics.timestamp.public.set,
[0x5b13c3a4]
),
encodeUnchecked(keyring.nobody, 0)(
extrinsics.parachains.public.setHeads,
[[]]
)
])
).toEqual(
new Uint8Array([
140, 102, 133, 98, 214, 123, 73, 173, 122, 252, 247, 48, 181, 86, 77, 188, 213, 161, 17, 19, 73, 96, 158, 181, 249, 69, 97, 15, 186, 12, 45, 157
])
// hexToU8a(
// '0xab602f7974bbfb513f021f39777e2195094dc64a2c1b7c82a1781cb9fd4768a8'
// )
);
});it('calculates the root correctly (actual)', () => {
expect(
root([
encodeUnchecked(keyring.nobody, 0)(
extrinsics.timestamp.public.set,
[0x5b13c3a4]
),
encodeUnchecked(keyring.nobody, 0)(
extrinsics.parachains.public.setHeads,
[[]]
)
])
).toEqual(
new Uint8Array([
140, 102, 133, 98, 214, 123, 73, 173, 122, 252, 247, 48, 181, 86, 77, 188, 213, 161, 17, 19, 73, 96, 158, 181, 249, 69, 97, 15, 186, 12, 45, 157
])
// hexToU8a(
// '0xab602f7974bbfb513f021f39777e2195094dc64a2c1b7c82a1781cb9fd4768a8'
// )
);
});it('calculates the root correctly (actual)', () => {
expect(
root([
encodeUnchecked(
keyring.nobody, 0,
extrinsics.timestamp.public.set,
[0x5b13c3a4]
),
encodeUnchecked(
keyring.nobody, 0,
extrinsics.parachains.public.setHeads,
[[]]
)
])
).toEqual(
new Uint8Array([
140, 102, 133, 98, 214, 123, 73, 173, 122, 252, 247, 48, 181, 86, 77, 188, 213, 161, 17, 19, 73, 96, 158, 181, 249, 69, 97, 15, 186, 12, 45, 157
])
// hexToU8a(
// '0xab602f7974bbfb513f021f39777e2195094dc64a2c1b7c82a1781cb9fd4768a8'
// )
);
});it('encodes a block correctly (actual values)', () => {
expect(
encodeBlock(
blockBuilder({
header: {
number: 9,
parentHash: hexToU8a('0x737d699e4e42f78dc2fb098f01bb85389f2c7f0a77bb41918adac6bfa5b3ee46'),
stateRoot: hexToU8a('0xf707774183723f201b875024069f30e7089b7f83c3c3cdc534b10d15fca91262')
},
extrinsics: [
encodeUnchecked(keyring.nobody, 0)(
extrinsics.timestamp.public.set,
[0x5b13c3a4]
),
encodeUnchecked(keyring.nobody, 0)(
extrinsics.parachains.public.setHeads,
[[]]
)
]
})
)
).toEqual(
new Uint8Array([
115, 125, 105, 158, 78, 66, 247, 141, 194, 251, 9, 143, 1, 187, 133, 56, 159, 44, 127, 10, 119, 187, 65, 145, 138, 218, 198, 191, 165, 179, 238, 70, 9, 0, 0, 0, 0, 0, 0, 0, 247, 7, 119, 65, 131, 114, 63, 32, 27, 135, 80, 36, 6, 159, 48, 231, 8, 155, 127, 131, 195, 195, 205, 197, 52, 177, 13, 21, 252, 169, 18, 98, 140, 102, 133, 98, 214, 123, 73, 173, 122, 252, 247, 48, 181, 86, 77, 188, 213, 161, 17, 19, 73, 96, 158, 181, 249, 69, 97, 15, 186, 12, 45, 157, 0, 0, 0, 0, 2, 0, 0, 0, 111, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 164, 195, 19, 91, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 107, 0, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
])
// hexToU8a(
// '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'
// )
);
});
});async function transfer (keyRingFrom, addressTo, amount) {
const accountIndex = await getAccountIndex(keyRingFrom.address());
console.log(`Current accountIndex: ${accountIndex}`);
// encode the call for signing
const message = encodeExtrinsic(
keyRingFrom.publicKey(),
accountIndex,
extrinsics.staking.public.transfer,
[addressTo, amount]
);
// get the signature
const signature = keyRingFrom.sign(message);
// encode the extrinsic for submission, adding the length (prefix) and the
// signature (postfix)Rödl
const encoded = encodeLength(
// When working with publicKeys, the prefix is 0xff for poc-2+
new Uint8Array([0xff]),
message,
signature
);
return api.author.submitExtrinsic(encoded);async function transfer (keyRingFrom, addressTo, amount) {
const nextAccountIndex = await getAccountIndex(keyRingFrom.address());
// encode the call for signing
const encoded = encodeExtrinsic(
keyRingFrom,
nextAccountIndex,
extrinsics.staking.public.transfer,
[addressTo, amount]
);
await api.author.submitExtrinsic(encoded)
.catch(e => console.log);
}async function transfer (keyRingFrom, addressTo, amount) {
const accountIndex = await getAccountIndex(keyRingFrom.address());
console.log(`Current accountIndex: ${accountIndex}`);
// encode the call for signing
const message = encodeExtrinsic(
keyRingFrom.publicKey(),
accountIndex,
extrinsics.staking.public.transfer,
[addressTo, amount]
);
// get the signature
const signature = keyRingFrom.sign(message);
// encode the extrinsic for submission, adding the length (prefix) and the
// signature (postfix)Rödl
const encoded = encodeLength(
// When working with publicKeys, the prefix is 0xff for poc-2+
new Uint8Array([0xff]),
message,
signature@polkadot/extrinsics
Base extrinsic definitions & codecs
Package Health Score
64 / 100Popular @polkadot/extrinsics functions
- @polkadot/extrinsics.default
- @polkadot/extrinsics.default.staking
- @polkadot/extrinsics.parachains
- @polkadot/extrinsics.staking
- @polkadot/extrinsics.timestamp
- @polkadot/extrinsics/codec/decode/length
- @polkadot/extrinsics/codec/encode.default
- @polkadot/extrinsics/codec/encode/call
- @polkadot/extrinsics/codec/encode/extrinsic
- @polkadot/extrinsics/codec/encode/length
- @polkadot/extrinsics/codec/encode/length.default
- @polkadot/extrinsics/codec/encode/prefixes.none
- @polkadot/extrinsics/codec/encode/prefixes.publicKey
- @polkadot/extrinsics/codec/encode/unchecked
- @polkadot/extrinsics/codec/encode/uncheckedLength.default
- @polkadot/extrinsics/fromMetadata