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ERC725

decodeData

erc725.decodeData(data [, schemas]);
ERC725.decodeData(data, schemas);

If you are reading the key-value store from an ERC725 smart-contract you can use the decodeData function to do the decoding for you.

tip

If you want total convenience, it is recommended to use the fetchData function, which automatically decodes and fetches external references.

Parameters

1. data - Object or array of Objects

An object or array of objects containing the following properties:

NameTypeDescription
keyNamestringCan be either the named key (i.e. LSP3Profile, LSP12IssuedAssetsMap:<address>) or the hashed key (with or without 0x prefix, i.e. 0x5ef... or 5ef...).
dynamicKeyParts (optional)string or
string[ ]
If keyName is a dynamic key, the dynamic parts of the keyName that will be used for encoding the key.
valuestring or
string[ ]
The value that should be decoded. Can be a string, an array of string or a JSON...

The keyName also supports dynamic keys for Mapping and MappingWithGrouping. Therefore, you can use variables in the key name such as LSP12IssuedAssetsMap:<address>. In that case, the value should also set the dynamicKeyParts property:

  • dynamicKeyParts: string or string[ ] which holds the variables that needs to be encoded.
2. schemas - Array of Objects (optional)

An array of extra LSP-2 ERC725YJSONSchema objects that can be used to find the schema. If called on an instance, it is optional and it will be concatenated with the schema provided on instantiation.

Returns

NameTypeDescription
decodedDataObject or ArrayThe decoded data as defined and expected in the following schemas.
info
  • If the input is an array of objects, the values will be returned in an array.
  • If the input is a single object, the output will be the decodedData object directly.

Single-Key Example

Decoding an object with one key
erc725.decodeData([
{
keyName: 'LSP3Profile',
value:
'0x6f357c6a820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361696670733a2f2f516d597231564a4c776572673670456f73636468564775676f3339706136727963455a4c6a7452504466573834554178',
},
]);
/**
[
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0x820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361',
url: 'ipfs://QmYr1VJLwerg6pEoscdhVGugo39pa6rycEZLjtRPDfW84UAx',
},
},
]
*/

erc725.decodeData({
keyName: 'LSP3Profile',
value:
'0x6f357c6a820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361696670733a2f2f516d597231564a4c776572673670456f73636468564775676f3339706136727963455a4c6a7452504466573834554178',
});
/**
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0x820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361',
url: 'ipfs://QmYr1VJLwerg6pEoscdhVGugo39pa6rycEZLjtRPDfW84UAx',
},
}
*/

Multi-Key Example

Decoding an object with multiple keys
erc725.decodeData([
{
keyName: 'LSP3Profile',
value:
'0x6f357c6a820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361696670733a2f2f516d597231564a4c776572673670456f73636468564775676f3339706136727963455a4c6a7452504466573834554178',
},
{
keyName: 'LSP12IssuedAssets[]',
value: [
{
key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
value:
'0x0000000000000000000000000000000000000000000000000000000000000002',
},
{
key: '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000000',
value: '0xd94353d9b005b3c0a9da169b768a31c57844e490',
},
{
key: '0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000001',
value: '0xdaea594e385fc724449e3118b2db7e86dfba1826',
},
],
},
]);
/**
[
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hash: '0x820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361',
hashFunction: 'keccak256(utf8)',
url: 'ipfs://QmYr1VJLwerg6pEoscdhVGugo39pa6rycEZLjtRPDfW84UAx',
},
},
{
name: 'LSP12IssuedAssets[]',
key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
value: [
'0xD94353D9B005B3c0A9Da169b768a31C57844e490',
'0xDaea594E385Fc724449E3118B2Db7E86dFBa1826',
],
},
];
*/

Dynamic-Key Example

Decoding an object with dynamic key and a custom schema
const schemas = [
{
name: 'MyKeyName:<bytes32>:<bool>',
key: '0x...',
keyType: 'Singleton',
valueType: 'bytes',
valueContent: 'JSONURL',
},
];

erc725.decodeData(
[
{
keyName: 'MyKeyName:<bytes32>:<bool>',
dynamicKeyParts: [
'0xaaaabbbbccccddddeeeeffff111122223333444455556666777788889999aaaa',
'true',
],
value:
'0x6f357c6a820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361696670733a2f2f516d597231564a4c776572673670456f73636468564775676f3339706136727963455a4c6a7452504466573834554178',
},
],
schemas,
);
/**
[
{
name: 'MyKeyName:aaaabbbbccccddddeeeeffff111122223333444455556666777788889999aaaa:true',
key: '0x35e6950bc8d2aaaabbbb00000000000000000000000000000000000000000001',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0x820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361',
url: 'ifps://QmYr1VJLwerg6pEoscdhVGugo39pa6rycEZLjtRPDfW84UAx',
},
},
];
*/

decodePermissions

ERC725.decodePermissions(permission);

Decodes permissions from hexadecimal defined by the LSP6 KeyManager Standard.

info

decodePermissions is available as either a static or non-static method so can be called without instantiating an ERC725 object.

Parameters

1. permission - String

The encoded permission (32bytes hex).

Returns

NameTypeDescription
decodedPermissionsObjectAn object specifying whether default LSP6 permissions are included in provided hexademical string.

Example

Decoding permissions
ERC725.decodePermissions('0x0000000000000000000000000000000000000000000000000000000000000110'),
/**
{
CHANGEOWNER: false,
CHANGEPERMISSIONS: false,
ADDPERMISSIONS: false,
SETDATA: false,
CALL: true,
STATICCALL: false,
DELEGATECALL: false,
DEPLOY: false,
TRANSFERVALUE: true,
SIGN: false,
}
*/

ERC725.decodePermissions('0x000000000000000000000000000000000000000000000000000000000000000a'),
/**
{
CHANGEOWNER: false,
CHANGEPERMISSIONS: true,
ADDPERMISSIONS: false,
SETDATA: true,
CALL: false,
STATICCALL: false,
DELEGATECALL: false,
DEPLOY: false,
TRANSFERVALUE: false,
SIGN: false,
}
*/

// This method is also available on the instance:
myErc725.decodePermissions('0x0000000000000000000000000000000000000000000000000000000000000110'),

encodeData

erc725.encodeData(data [, schemas]);
ERC725.encodeData(data, schemas);

Encode the data of a smart contract according to your ERC725JSONSchema so that you can store the information in smart contracts.

tip

When encoding JSON, it is possible to pass in the JSON object and the URL where it is available publicly. The JSON will be hashed with keccak256.

Parameters

1. data - Object or array of Objects

An object or array of objects containing the following properties:

NameTypeDescription
keyNamestringCan be either the named key (i.e. LSP3Profile, LSP12IssuedAssetsMap:<address>) or the hashed key (with or without 0x prefix, i.e. 0x5ef... or 5ef...).
dynamicKeyParts (optional)string or
string[ ]
The dynamic parts of the keyName that will be used for encoding the key.
valuestring or
string[ ]
JSON todo
The value that should be encoded. Can be a string, an array of string or a JSON...

The keyName also supports dynamic keys for Mapping and MappingWithGrouping. Therefore, you can use variables in the key name such as LSP12IssuedAssetsMap:<address>. In that case, the value should also set the dynamicKeyParts property:

  • dynamicKeyParts: string or string[ ] which holds the variables that needs to be encoded.
2. schemas - Array of Objects (optional)

An array of extra LSP-2 ERC725YJSONSchema objects that can be used to find the schema. If called on an instance, it is optional and it will be concatenated with the schema provided on instantiation.

Returns

NameTypeDescription
encodedDataObjectAn object containing the encoded keys and values according to the LSP2 ERC725Y JSON Schema of the data which was passed

After the data is encoded, the object is ready to be stored in smart contracts.

Examples

Encode a JSONURL with JSON and uploaded URL
erc725.encodeData([
{
keyName: 'LSP3Profile',
value: {
json: profileJson,
url: 'ipfs://QmQTqheBLZFnQUxu5RDs8tA9JtkxfZqMBcmGd9sukXxwRm',
},
},
]);
/**
{
keys: ['0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5'],
values: ['0x6f357c6a2404a2866f05e53e141eb61382a045e53c2fc54831daca9d9e1e039a11f739e1696670733a2f2f516d5154716865424c5a466e5155787535524473387441394a746b78665a714d42636d47643973756b587877526d'],
}
*/

// You can also use the hashed key (with or without 0x prefix)
erc725.encodeData([
{
keyName:
'0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
json: profileJson,
url: 'ipfs://QmQTqheBLZFnQUxu5RDs8tA9JtkxfZqMBcmGd9sukXxwRm',
},
},
]);
/**
{
keys: ['0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5'],
values: ['0x6f357c6a2404a2866f05e53e141eb61382a045e53c2fc54831daca9d9e1e039a11f739e1696670733a2f2f516d5154716865424c5a466e5155787535524473387441394a746b78665a714d42636d47643973756b587877526d'],
}
*/

erc725.encodeData([
{
keyName: '5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
json: profileJson,
url: 'ipfs://QmQTqheBLZFnQUxu5RDs8tA9JtkxfZqMBcmGd9sukXxwRm',
},
},
]);
/**
{
keys: ['0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5'],
values: ['0x6f357c6a2404a2866f05e53e141eb61382a045e53c2fc54831daca9d9e1e039a11f739e1696670733a2f2f516d5154716865424c5a466e5155787535524473387441394a746b78665a714d42636d47643973756b587877526d'],
}
*/
erc725.encodeData({
keyName: 'LSP1UniversalReceiverDelegate',
value: '0x1183790f29BE3cDfD0A102862fEA1a4a30b3AdAb',
});
/**
{
keys: ['0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47'],
values: ['0x1183790f29be3cdfd0a102862fea1a4a30b3adab'],
}
*/
Encode a JSONURL with hash function, hash and uploaded URL
erc725.encodeData([
{
keyName: 'LSP3Profile',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0x820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361',
url: 'ipfs://QmYr1VJLwerg6pEoscdhVGugo39pa6rycEZLjtRPDfW84UAx',
},
},
]);
/**
{
keys: ['0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5'],
values: ['0x6f357c6a820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361696670733a2f2f516d597231564a4c776572673670456f73636468564775676f3339706136727963455a4c6a7452504466573834554178'],
}
*/
Encode dynamic keys
const schemas = [
{
name: 'DynamicKey:<address>',
key: '0x0fb367364e1852abc5f20000<address>',
keyType: 'Mapping',
valueType: 'bytes',
valueContent: 'Address',
},
];

erc725.encodeData(
[
{
keyName: 'DynamicKey:<address>',
dynamicKeyParts: ['0xbedbedbedbedbedbedbedbedbedbedbedbedbedb'],
value: '0xcafecafecafecafecafecafecafecafecafecafe',
},
],
schemas,
);
/**
{
keys: ['0x0fb367364e1852abc5f20000bedbedbedbedbedbedbedbedbedbedbedbedbedb'],
values: ['0xcafecafecafecafecafecafecafecafecafecafe]
}
*/

const schemas = [
{
name: 'DynamicKey:<bytes4>:<string>',
key: '0xForDynamicKeysThisFieldIsIrrelevantAndWillBeOverwriten',
keyType: 'Mapping',
valueType: 'bytes',
valueContent: 'Address',
},
];

erc725.encodeData(
[
{
keyName: 'DynamicKey:<bytes4>:<string>',
dynamicKeyParts: ['0x11223344', 'Summer'],
value: '0xcafecafecafecafecafecafecafecafecafecafe',
},
],
schemas,
);
/**
{
keys: ['0x0fb367364e1852abc5f2000078c964cd805233eb39f2db152340079088809725'],
values: ['0xcafecafecafecafecafecafecafecafecafecafe']
}
*/
Encode multiple keys at once
erc725.encodeData([
{
keyName: 'LSP3Profile',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0x820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361',
url: 'ipfs://QmYr1VJLwerg6pEoscdhVGugo39pa6rycEZLjtRPDfW84UAx',
},
},
{
keyName: 'LSP12IssuedAssets[]',
value: [
'0xD94353D9B005B3c0A9Da169b768a31C57844e490',
'0xDaea594E385Fc724449E3118B2Db7E86dFBa1826',
],
},
{
keyName: 'LSP1UniversalReceiverDelegate',
value: '0x1183790f29BE3cDfD0A102862fEA1a4a30b3AdAb',
},
]);
/**
{
keys: [
'0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
'0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
'0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000000',
'0x7c8c3416d6cda87cd42c71ea1843df2800000000000000000000000000000001',
'0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
],
values: [
'0x6f357c6a820464ddfac1bec070cc14a8daf04129871d458f2ca94368aae8391311af6361696670733a2f2f516d597231564a4c776572673670456f73636468564775676f3339706136727963455a4c6a7452504466573834554178',
'0x0000000000000000000000000000000000000000000000000000000000000002',
'0xd94353d9b005b3c0a9da169b768a31c57844e490',
'0xdaea594e385fc724449e3118b2db7e86dfba1826',
'0x1183790f29be3cdfd0a102862fea1a4a30b3adab',
],
}
*/

encodeKeyName

ERC725.encodeKeyName(keyName [, dynamicKeyParts]);

Hashes a key name for use on an ERC725Y contract according to the LSP2 ERC725Y JSON Schema Standard.

info

encodeKeyName is available as either a static or non-static method so can be called without instantiating an ERC725 object.

Parameters

1. keyName - String

The key name you want to encode, for instance: LSP3Profile.

2. dynamicKeyParts - String or array of Strings (optional)

The variables used to encode the key name, if the key name is a dynamic (i.e.: MyKey:<address>...)

Returns

NameTypeDescription
encodedKeyNamestringThe keccak256 hash of the provided key name.

The hash must be retrievable from the ERC725Y contract via the getData function.

Example

Encode the key name
ERC725.encodeKeyName('LSP3Profile');
// '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5'

ERC725.encodeKeyName('SupportedStandards:LSP3UniversalProfile');
// '0xeafec4d89fa9619884b60000abe425d64acd861a49b8ddf5c0b6962110481f38'

ERC725.encodeKeyName(
'AddressPermissions:Permissions:cafecafecafecafecafecafecafecafecafecafe',
);
// '0x4b80742de2bf82acb3630000cafecafecafecafecafecafecafecafecafecafe'

ERC725.encodeKeyName('MyKeyName:<bool>', 'true');
// '0x35e6950bc8d21a1699e500000000000000000000000000000000000000000001'

ERC725.encodeKeyName('MyKeyName:<bytes2>:<uint32>', ['ffff', '4081242941']);
// 0x35e6950bc8d20000ffff000000000000000000000000000000000000f342d33d

ERC725.encodeKeyName('MyKeyName:<uint32>', ['4081242941']);
// 0x35e6950bc8d21a1699e5000000000000000000000000000000000000f342d33d

// This method is also available on the instance:
myErc725.encodeKeyName('LSP3Profile');

encodePermissions

ERC725.encodePermissions(permissions);

Encodes permissions into a hexadecimal string as defined by the LSP6 KeyManager Standard.

info

encodePermissions is available as either a static or non-static method so can be called without instantiating an ERC725 object.

Parameters

1. permissions - Object

An object with LSP6 KeyManager Permissions as keys and a boolean as value. Any ommited permissions will default to false.

Returns

NameTypeDescription
PromisestringThe permissions encoded as a hexadecimal string defined by the LSP6 KeyManager Standard

Example

Encoding permissions
ERC725.encodePermissions({
CHANGEOWNER: false,
CHANGEPERMISSIONS: false,
ADDPERMISSIONS: false,
SETDATA: false,
CALL: true,
STATICCALL: false,
DELEGATECALL: false,
DEPLOY: false,
TRANSFERVALUE: true,
SIGN: false,
}),
// '0x0000000000000000000000000000000000000000000000000000000000000110'

// Any ommited Permissions will default to false
ERC725.encodePermissions({
CHANGEPERMISSIONS: true,
SETDATA: true,
}),
// '0x000000000000000000000000000000000000000000000000000000000000000a'


// This method is also available on the instance:
myErc725.encodePermissions({
CHANGEPERMISSIONS: true,
SETDATA: true,
}),

fetchData

erc725.fetchData([keys]);

The fetchData function fetches smart contract data and can additionally return JSONURL or ASSETURL data from IPFS, HTTP, or HTTPS endpoints.

info

To ensure data authenticity fetchData compares the hash of the fetched JSON with the hash stored on the blockchain.

info

If you get the ReferenceError: fetch is not defined error, you need to install and import isomorphic-fetch.

Parameters

1. keys - String, Object or array of Strings or/and Objects (optional)

The name(s) (or the encoded name(s) as schema key) of the element(s) in the smart contract's schema. If no keys are set, it will fetch all the non dynamic schema keys given at instantiation. For dynamic keys, you can use the object below:

NameTypeDescription
keyNamestringThe dynamic key name, such as MyKey:<address>
dynamicKeyPartsstring or
string[ ]
The dynamic parts of the keyName that will be used for encoding the key.

Returns

NameTypeDescription
dataPromise<Array> or
Promise<Object>
An array with same objects as for decodeData() function but with the value being remplaced by the actual file for JSONURL and ASSETURL valueContent. If there is a hash mismatch, the value will be null.
info
  • If the input is an array, the values will be returned in an array.
  • If the input is a single key, the output will be the object directly.

All-Keys Example

Receiving all keys from the schema
await erc725.fetchData();
/**
[
{
name: 'SupportedStandards:LSP3UniversalProfile',
key: '0xeafec4d89fa9619884b60000abe425d64acd861a49b8ddf5c0b6962110481f38',
value: '0xabe425d6'
},
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: { LSP3Profile: [Object] }
},
{
name: 'LSP1UniversalReceiverDelegate',
key: '0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
value: '0xE2D6038acD92200790Df695Ebd13856CdF2a6942'
},
{
name: 'LSP12IssuedAssets[]',
key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
value: [
'0xc444009d38d3046bb0cF81Fa2Cd295ce46A67C78',
'0x4fEbC3491230571F6e1829E46602e3b110215A2E',
'0xB92a8DdA288638491AEE5C2a003D4CAbfa47aE3F',
'0x1e52e7F1707dcda57dD33F003B2311652A465acA',
'0x0BDA71aA980D37Ea56E8a3784E4c309101DAf3E4',
'0xfDB4D9C299438B9839e9d04E34B9609C5b56600D',
'0x081D3F0bff8ae2339cb65113822eEc1510704d5c',
'0x55C98c6944B7497FaAf4db0386a1aD1E6efF526E',
'0x90D1a1D68fa23AEEE991220703f1a1C3782e0b35',
'0xdB5AB19792d9fB61c1Dff57810Fb7C6f839Af8ED'
]
}
]
*/

Single-Key Example

Receiving one key from the schema
await erc725.fetchData('LSP3Profile');
/**
{
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
name: 'LSP3Profile',
value: { LSP3Profile: { name: 'Test', description: 'Cool' } }
}
*/
await erc725.fetchData(['LSP1UniversalReceiverDelegate']);
/**
[
{
name: 'LSP1UniversalReceiverDelegate',
key: '0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
value: '0xE2D6038acD92200790Df695Ebd13856CdF2a6942'
}
]
*/

Multi-Keys / Dynamic-Keys Example

Receiving multiple keys from the schema
await erc725.fetchData(['LSP3Profile', 'LSP1UniversalReceiverDelegate']);
/**
[
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: { LSP3Profile: [Object] }
},
{
name: 'LSP1UniversalReceiverDelegate',
key: '0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
value: '0xE2D6038acD92200790Df695Ebd13856CdF2a6942'
}
]
*/

await erc725.fetchData([
'LSP1UniversalReceiverDelegate',
{
keyName: 'LSP12IssuedAssetsMap:<address>',
dynamicKeyParts: '0xcafecafecafecafecafecafecafecafecafecafe',
},
]);
/**
[
{
name: 'LSP1UniversalReceiverDelegate',
key: '0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
value: '0xE2D6038acD92200790Df695Ebd13856CdF2a6942'
},
{
name: 'LSP12IssuedAssetsMap:cafecafecafecafecafecafecafecafecafecafe',
key: '0x74ac2555c10b9349e78f0000cafecafecafecafecafecafecafecafecafecafe',
value: null
}
]
*/

getData

erc725.getData([keys]);

Gets decoded data for one, many, or all of the specified ERC725 smart contract's keys. When omitting the keys parameter, it will give back every key (as per ERC725JSONSchema definition).

caution
  • Data returned by this function does not contain external data of JSONURL or ASSETURL schema elements.
  • If you would like to receive everything in one go, you can use fetchData.

Parameters

1. keys - String, Object or array of Strings or/and Objects (optional)

The name(s) (or the encoded name(s) as schema key) of the element(s) in the smart contract's schema. If no keys are set, it will fetch all the non dynamic schema keys given at instantiation. For dynamic keys, you can use the object below:

NameTypeDescription
keyNamestringThe dynamic key name, such as MyKey:<address>
dynamicKeyPartsstring or
string[ ]
The dynamic parts of the keyName that will be used for encoding the key.

Returns

NameTypeDescription
dataPromise<Array> or
Promise<Object>
An array with same objects as for decodeData() function.
info
  • If the input is an array, the values will be returned in an array.
  • If the input is a single key, the output will be the object directly.

All-Keys Example

Receiving all keys from the schema
await erc725.getData();
/**
[
{
name: 'SupportedStandards:LSP3UniversalProfile',
key: '0xeafec4d89fa9619884b60000abe425d64acd861a49b8ddf5c0b6962110481f38',
value: '0xabe425d6',
},
{
name: 'LSP1UniversalReceiverDelegate',
key: '0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
value: '0x50A02EF693fF6961A7F9178d1e53CC8BbE1DaD68',
},
{
name: 'LSP12IssuedAssets[]',
key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
value: [
'0xc444009d38d3046bb0cF81Fa2Cd295ce46A67C78',
'0x4fEbC3491230571F6e1829E46602e3b110215A2E',
'0xB92a8DdA288638491AEE5C2a003D4CAbfa47aE3F',
'0x1e52e7F1707dcda57dD33F003B2311652A465acA',
'0x0BDA71aA980D37Ea56E8a3784E4c309101DAf3E4',
'0xfDB4D9C299438B9839e9d04E34B9609C5b56600D',
'0x081D3F0bff8ae2339cb65113822eEc1510704d5c',
'0x55C98c6944B7497FaAf4db0386a1aD1E6efF526E',
'0x90D1a1D68fa23AEEE991220703f1a1C3782e0b35',
'0xdB5AB19792d9fB61c1Dff57810Fb7C6f839Af8ED'
],
},
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0x70546a2accab18748420b63c63b5af4cf710848ae83afc0c51dd8ad17fb5e8b3',
url: 'ipfs://QmecrGejUQVXpW4zS948pNvcnQrJ1KiAoM6bdfrVcWZsn5',
},
},
]
*/

Single-Key Example

Receiving one key from the schema
await erc725.getData('LSP3Profile');
/**
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0xd96ff7776660095f661d16010c4349aa7478a9129ce0670f771596a6ff2d864a',
url: 'ipfs://QmbTmcbp8ZW23vkQrqkasMFqNg2z1iP4e3BCUMz9PKDsSV'
},
}
*/

await erc725.getData(['LSP3Profile']);
/**
[
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0xd96ff7776660095f661d16010c4349aa7478a9129ce0670f771596a6ff2d864a',
url: 'ipfs://QmbTmcbp8ZW23vkQrqkasMFqNg2z1iP4e3BCUMz9PKDsSV'
},
}
]
*/

await erc725.getData('LSP1UniversalReceiverDelegate');
/**
{
name: 'LSP1UniversalReceiverDelegate',
key: '0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
value: '0x50A02EF693fF6961A7F9178d1e53CC8BbE1DaD68',
}
*/

Multi-Key Example

Receiving multiple keys from the schema
await erc725.getData(['LSP3Profile', 'LSP1UniversalReceiverDelegate']);
/**
[
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0xeeafeebeb416923dfb0dcf4c66b045c72742121ce2a06f93ae044ee0efb70777',
url: 'ipfs://QmZnG5Z5B5Dq8iFFtsL5i7AnrgH16P4DJ8UhY7j8RzX51p'
}
},
{
name: 'LSP1UniversalReceiverDelegate',
key: '0x0cfc51aec37c55a4d0b1a65c6255c4bf2fbdf6277f3cc0730c45b828b6db8b47',
value: '0xE2D6038acD92200790Df695Ebd13856CdF2a6942'
}
]
*/

Dynamic-Key Example

Receiving dynamic keys from the schema
await erc725.getData({
keyName: 'LSP12IssuedAssetsMap:<address>',
dynamicKeyParts: '0xcafecafecafecafecafecafecafecafecafecafe',
});
/**
{
name: 'LSP12IssuedAssetsMap:cafecafecafecafecafecafecafecafecafecafe',
key: '0x74ac2555c10b9349e78f0000cafecafecafecafecafecafecafecafecafecafe',
value: '0x6b175474e89094c44da98b954eedeac495271d0f',
}
*/

await erc725.getData([
{
keyName: 'LSP12IssuedAssetsMap:<address>',
dynamicKeyParts: '0xcafecafecafecafecafecafecafecafecafecafe',
},
]);
/**
[
{
name: 'LSP12IssuedAssetsMap:cafecafecafecafecafecafecafecafecafecafe',
key: '0x74ac2555c10b9349e78f0000cafecafecafecafecafecafecafecafecafecafe',
value: '0x6b175474e89094c44da98b954eedeac495271d0f',
}
]
*/
Receiving dynamic keys from the schema
await erc725.getData([
'LSP3Profile',
{
keyName: 'LSP12IssuedAssetsMap:<address>',
dynamicKeyParts: '0xcafecafecafecafecafecafecafecafecafecafe',
},
]);
/**
[
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
value: {
hashFunction: 'keccak256(utf8)',
hash: '0xeeafeebeb416923dfb0dcf4c66b045c72742121ce2a06f93ae044ee0efb70777',
url: 'ipfs://QmZnG5Z5B5Dq8iFFtsL5i7AnrgH16P4DJ8UhY7j8RzX51p'
}
},
{
name: 'LSP12IssuedAssetsMap:cafecafecafecafecafecafecafecafecafecafe',
key: '0x74ac2555c10b9349e78f0000cafecafecafecafecafecafecafecafecafecafe',
value: null
}
]
*/

getOwner

erc725.getOwner([address]);

Returns the contract owner and is not directly related to ERC725 specifications.

Parameters

1. address - String (optional)

The contract address you wish to find the owner of. If no address is set, will return the owner of the contract used to initialise the ERC725 class.

Returns

NameTypeDescription
PromisestringThe contract or EOA address of the owner.
info

The address of the contract owner as stored in the contract.

Example

Receiving the owner address
// If no address is set, it will return the owner of the contract used to initialise the ERC725() class.
await erc725.getOwner();
// '0x94933413384997F9402cc07a650e8A34d60F437A'

// You can also get the owner of a specific contract by setting the address parameter
await erc725.getOwner('0x3000783905Cc7170cCCe49a4112Deda952DDBe24');
// '0x7f1b797b2Ba023Da2482654b50724e92EB5a7091'

getSchema

erc725.getSchema(keys [, providedSchemas]);

Parses a hashed key or a list of hashed keys and will attempt to return its corresponding LSP2 ERC725YJSONSchema object. Additionally, it will look for a corresponding key within the schemas:

  • in the schemas folder (which includes all LSPs),
  • that were provided at ERC725 initialisation, and
  • that were provided in the function call (providedSchemas).

Parameters

1. keys - String or array of Strings

The key(s) you are trying to get the schema for.

2. providedSchemas - Object (optional)

An array of extra LSP-2 ERC725YJSONSchema objects that can be used to find the schema.

Returns

NameTypeDescription
resultERC725JSONSchemaIf the parameter keys is a string and the schema was found.
resultRecord stringIf the parameter keys is a string[ ] and the schema was found.
resultnullIf the schema was not found.

Example using a predefined LSP3 schema

Parsing the hashed key from the LSP3 schema
erc725.getSchema(
'0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
);
/**
{
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
keyType: 'Singleton',
valueContent: 'JSONURL',
valueType: 'bytes'
}
*/
erc725.getSchema([
'0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
'0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000001',
]);
/**
{
'0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5': {
name: 'LSP3Profile',
key: '0x5ef83ad9559033e6e941db7d7c495acdce616347d28e90c7ce47cbfcfcad3bc5',
keyType: 'Singleton',
valueContent: 'JSONURL',
valueType: 'bytes'
},
'0x3a47ab5bd3a594c3a8995f8fa58d087600000000000000000000000000000001': {
name: 'LSP12IssuedAssets[1]',
key: '0x7c8c3416d6cda87cd42c71ea1843df28ac4850354f988d55ee2eaa47b6dc05cd',
keyType: 'Singleton',
valueContent: 'Address',
valueType: 'address'
}
}
*/

Example using a custom schema

Parsing the hashed key from a custom schema
erc725.getSchema(
'0x777f55baf2e0c9f73d3bb456dfb8dbf6e609bf557969e3184c17ff925b3c402c',
[
{
name: 'ParameterSchema',
key: '0x777f55baf2e0c9f73d3bb456dfb8dbf6e609bf557969e3184c17ff925b3c402c',
keyType: 'Singleton',
valueContent: 'JSONURL',
valueType: 'bytes',
},
],
);
/**
{
name: 'ParameterSchema',
key: '0x777f55baf2e0c9f73d3bb456dfb8dbf6e609bf557969e3184c17ff925b3c402c',
keyType: 'Singleton',
valueContent: 'JSONURL',
valueType: 'bytes',
}
*/

isValidSignature

erc725.isValidSignature(messageOrHash, signature);

Checks if a signature was signed by the owner of the ERC725 Account contract, according to EIP-1271. If the owner is a contract itself, it will delegate the isValidsignature() call to the owner contract if it supports EIP-1271. Otherwise, it will fail.

Parameters

1. messageOrHash - String

Value of a message or hash that needs to be verified.

2. signature - String

The raw RLP encoded signature.

info
  • The hash must be 66 chars long with the 0x prefix, otherwise it will be interpreded as message.
  • The message will be: enveloped as "\x19Ethereum Signed Message:\n" + message.length + message and hashed using keccak256 function. The signature can be generated with web3.eth.accounts.sign().

Returns

NameTypeDescription
Promisebooleantrue if signature is valid, false if signature is invalid.
info
  • A valid signature means that the smart contract response IS the MAGICVALUE: 0x1626ba7e.
  • If this function is called on a contract which does not support EIP-1271, it will throw an error.

Examples

Checking the signature with a message
await erc725.isValidSignature(
'hello',
'0xb91467e570a6466aa9e9876cbcd013baba02900b8979d43fe208a4a4f339f5fd6007e74cd82e037b800186422fc2da167c747ef045e5d18a5f5d4300f8e1a0291c',
);
// true
Checking the signature with a hash
await erc725.isValidSignature(
'0x1da44b586eb0729ff70a73c326926f6ed5a25f5b056e7f47fbc6e58d86871655',
'0xcafecafeb915466aa9e9876cbcd013baba02900b8979d43fe208a4a4f339f5fd6007e74cd82e037b800186422fc2da167c747ef045e5d18a5f5d4300f8e1a0291c',
);
// false